جستجوی مقالات مرتبط با کلیدواژه « سولفات روی » در نشریات گروه « باغبانی »

In producing medicinal plants, it is critical to use plants with a high percentage of active ingredients and consume low amounts of water. Thymus daenensis Celak is a tolerant Thymus species for rainfed cultivation. In addition, using complementary irrigation regimes and applying anti-stress compounds at critical stages of plant growth are suitable programs for sustainable production and optimal water consumption under dry farming conditions. For this purpose, this experiment was to evaluate the effect of different complementary irrigation regimes along with sodium nitroprusside (SNP) as a nitric oxide donor, kaolin, and potassium spraying on yield and some biochemical characteristics of T. daenensis under rainfed conditions. This experiment was designed and implemented as a split plot based on a randomized complete blocks design with three replications in the research field of the Research Institute of Forests and Rangelands-Homand Rangelands Research Station (Damavand) for three years (2017-2019 crop years). The experimental treatments included complementary irrigation as the main factor at three levels: control (no irrigation), one and two complementary irrigation, and spraying of stress-modulating substances as a secondary factor with three compounds of SNP (200 µM), kaolin (5%) and potassium (75 kg/ha from a potassium sulfate source). Cultivation was indirect and through seedlings. To prepare seedlings, the seeds were planted in the cultivation trays in the greenhouse at the end of September. After growing in the greenhouse, the seedlings (8-10 leaves) were transferred to the field in November with rain monitoring. Complementary irrigation and different foliar spraying treatments were done twice in the pre-flowering and 10 % flowering stages. Treatments were applied in the third year of plant growth to increase economic yield. After applying the treatments, the plant's flowering branch was sampled to measure malondialdehyde (MDA). After measuring the morphological characteristics (plant height and canopy diameter) in the full flowering stage, plant shoots were harvested to determine the dry matter yield per square meter and hectare. Percentage and yield of essential oil, total phenol, total flavonoids, and antioxidant capacity were also determined. The results showed that increasing the number of complementary irrigations increased the crown diameter, plant height, and dry matter yield per plant and hectare. Kaolin treatment under two complementary irrigation regimes had the highest height (31.6 cm), and the control treatment under no irrigation had the lowest height (19.3 cm). Also, using kaolin and two complementary irrigations showed the highest dry matter yield per m2 (77.2 grams) and per hectare (771.4 kg). In addition, MDA content was lower in the double complementary irrigation treatment with kaolin foliar spraying (1.22 μmol/g of fresh weight). Foliar spraying of kaolin, potassium, and SNP under rainfed conditions (without irrigation) increased the amount of essential oil (by 1.83, 1.67, and 1.6 percent, respectively) compared to the control treatment (1.4 percent). In contrast, the maximum essential oil yield per hectare was related to the double complementary irrigation regime with potassium foliar spraying (10.6 kg/ha). Foliar spraying with potassium in the regimes of without irrigation (rainfed) and one-time complementary irrigation had the highest content of total phenols and flavonoids, respectively. The highest antioxidant capacity was obtained without irrigation and foliar spraying (control). This experiment showed that complementary irrigation increased dry matter yield per plant and hectare. On the other hand, foliar spraying with anti-stress compounds, especially kaolin, and potassium, along with complementary irrigation, increased essential oil yield per hectare. In general, based on the results of this experiment, it is suggested to use complementary irrigation regimes according to the available water sources. In addition, it is suggested to use kaolin or potassium foliar application under rainfed conditions for T. daenensis.

 Drought is the most important limiting factor for the yield and quality of products in the world. Fertilizer application can mitigate drought stress in plants. Most farmers prefer to use inorganic (chemical) fertilizers because of their fast impact on plant growth. The reasonable cost of inorganic fertilizers and their availability are the other reasons. However, the long-term effects of organic fertilizers on plant growth and soil fertility has been proved. The grapevines are one of the most important garden products in the world as well as in Iran. It has been reported that the application of biochar has significant effects on soil fertility as well as plant growth. Biochars have properties such as highly porous structure, high specific surface area, higher water holding capacity of the soil, the long-term stability in the soil. In addition, our previous study indicated that it could decrease the hazard of sodium in soil compared with compost. In Iran, the cultivation area of grapevines was the second grade after the pistachio cultivation area in 2019. According to statistical data on agriculture in 2019, the cultivation area of irrigated and rain-fed grapevines in Kermanshah province was 7710 and 1515 ha, respectively. According to this report, the production of irrigated and rain-fed grapevines in Kermanshah province in 2019 was 82718 and 1763 tons, respectively. The effect of application of some inorganic and organic fertilizers under drought stress on yield, water use efficiency, and some biochemical characteristics of the grapevine leaves cultivar Bidane-Ghermez has been previously studied. In this research, the effect of drought stress and the application of potassium sulfate, compost, and biochar on antioxidant activities of the grapevine leaves cultivar Bidane-Ghermez was investigated.
 
A greenhouse study with a factorial experiment based on a block of randomized completely design was conducted with fertilizer treatments including control, potassium sulfate (1250 mg kg-1), compost (5% w/w), and biochar (10% w/w) without and with drought stress conditions (80 and 40% FC, respectively) during 2017-2018. For this research, the biochar was produced from apple tree pruning under low oxygen conditions by slow pyrolysis at 400 ◦C. The compost was purchased from the municipal compost factory of Kermanshah province. To evaluate drought stress and inorganic and organic fertilizers' application on antioxidant enzymes activities, the superoxide dismutase and peroxidase activities and total soluble protein of grapevine leaves were determined. The data were analyzed by ANOVA and the mean of studied characteristics was compared by Duncan’s test at 5% probability level using SAS software.
the results indicated that the interaction effect of fertilizers treatments and drought stress on the superoxide dismutase and peroxidase activities as well as total soluble protein was significant (P<0.01). Under drought stress conditions, among fertilizers’ treatments, the activity of superoxide dismutase for potassium sulfate was significantly lower than compost and biochar treatments (P<0.01). The results also showed that the peroxidase activity for compost was significantly higher than potassium sulfate and biochar treatments (P<0.01). Besides, the highest total soluble protein amount was found for biochar treatment (P<0.01).
 
 according to the results of this study, it can be concluded that the increase of total soluble protein of grapevine leaves under drought stress conditions by biochar application contributed to the increase of superoxide dismutase and peroxidase activities also increasing the bioavailability of macro-and micronutrients. Biochar application increased significantly the potassium concentration of the leaves of the grapevines. Potassium regulates water movement at the plant and also provides a higher relative water content of grapevine leaves. Moreover, potassium decreases the non-stomatal effects are also attributed to stomatal closure during drought stress conditions. Furthermore, potassium contributes to protein synthesis. Biochar application also increased the phosphorus, copper, and magnesium of the leaves of the grapevine. Higher concentration of phosphorus under drought stress conditions caused the grapevine leaves to suffer less from phosphorus deficiency. Copper exists in superoxide dismutase and is considered a key player in superoxide detoxification. Under drought stress conditions, higher manganese concentration by biochar application resulted in more protection of the cellular membrane against Reactive Oxygen Species (ROS). For fertilizer recommendation in order to reduce drought stress effects on some antioxidant enzymes activities of Bidane-Ghermez grapevine leaves, the application of biochar is recommended first then potassium sulfate and compost.

 Fertilizer management is one of the main factors in achieving sustainable agriculture. Therefore, the integrated agricultural system recommends the use of organic matter along with the optimal use of chemical fertilizers. This method is a balanced way to improve the physical and chemical properties of the soil, which leads to improved growth and increased plant yield. Organic fertilizers, especially livestock manures, have higher levels of organic matter than chemical fertilizers, and can be considered as sources of nutrients, especially nitrogen, phosphorus and potassium. One of these organic fertilizers is poultry manure, which in addition to having macro and micro elements (manganese, iron, copper, and boron) is one of the cheapest fertilizers compared to other fertilizers used. It is also richer in terms of nitrogen than other animal fertilizers. Soil fertility is the factor that change the amount of active substances and essential oils. Micronutrients such as zinc, although needed in small amounts by plants, play an important role in plant growth and development. The application of zinc sulfate fertilizer improved the quantitative and qualitative attributes of basil, peppermint, sage, and rosemary. Researchers stated that the application of a combination of chemical fertilizers and poultry manure has increased the yield of garlic essential oil. Therefore, in recent years, integrated plant nutrition management has been discussed. Integrated plant nutrition management is based on the simultaneous application of organic, chemical, and biological fertilizers. Because organic fertilizers alone can’t provide the needs of high-yielding plants. Combined application of organic, chemical, and biological fertilizers can improve the physical and chemical conditions of the soil and increase organic carbon and nutrients.  Savory is an aromatic medicinal plant from the mint family. This plant has a lot of essential oils and is very important in the food, pharmaceutical, and health industries. The aim of this study was to investigate the role of poultry manure and zinc sulfate in the cultivation of savory.

 The present experiment was performed as a factorial in a completely randomized design with 3 replications. The factors consisted of poultry manure with four levels (0, 3, 6, and 9 t.ha-1) and the second factor zinc sulfate with four levels (0, 50, 100 and 150 mg.kg-1 soil).

 According to the obtained results, the effect of poultry manure, zinc sulfate, and their interaction on most of the studied traits was significant. The highest height was observed in the treatment of poultry manure of 9 t.ha-1 + zinc sulfate in 100 mg. kg-1 soil, which showed an increase of 79.26% compared to the control, and the lowest height belonged to the control treatment. The total chlorophyll in the chicken manure treatment of 6 t.ha-1 + zinc sulfate in 150 mg. kg-1 had a significant increase compared to the control. The highest amount of leaf nitrogen was obtained in the treatment of poultry manure of 9 t.ha-1 + 50 mg.kg-1 with an increase of 82.03% compared to the control. Zinc element was observed with a 222.75% increase in poultry manure treatment of 9 t.ha-1 + 150 mg.kg-1. Poultry manure treatment of 6 tons per hectare + 150 mg.kg-1 with 261.53% increase compared to the control contained the highest percentage of essential oil.

 The results of the study showed that the use of combined ratios of poultry organic fertilizer and zinc sulfate has been effective in improving vegetative attributes, available plant elements, and essential oil content.

To investigate the effects of zinc, boron, and sulfur on the quantitative characteristics, elements uptake, and allicin content in Ziabar local garlic (Allium sativum L.), an experiment was conducted as a completely randomized block design with three replications in 2019-20. The treatments included 1- control (without fertilizer use), 2- Zn, 3- B, 4- S, 5- Zn+S, 6- Zn+B, 7- B+S, and 8- S+B+Zn. Sulfur, zinc, and boron fertilizers were added to the soil as sulfur flower (100 kg ha-1), ZnSO4·7H2O (20 kg ha−1), and H3BO3 (5 kg ha−1) at two vegetative growth and bulb filling stages. The results showed that the S+B+Zn treatment was significantly superior to other treatments in all studied traits. Among the single fertilizer treatments, the highest economic yield and boron uptake rate was observed with the B application. The S application resulted in the highest S uptake. The highest Zn uptake and allicin content was observed in the Zn application treatment. Among the dual treatments, the B+S treatment caused the highest economic yield and S and B uptake rate. The Zn+B treatment showed the highest Zn uptake. The highest allicin content (29%) was observed in the S+B+Zn treatment. The highest garlic economic yield (3000 kg ha-1) and the best quality in terms of allicin content (29%), S uptake (0.73 kg ha-1), Zn uptake (39.6 kg ha-1), and B uptake (12.96 kg ha-1) were obtained in the S+B+Zn treatment. According to the present results, the use of zinc, boron, and sulfur fertilizers along with basal fertilizers could be recommended to increase the quantitative and qualitative yield of garlic.

The marshmallow is used in Iranian traditional medicine and the pharmaceutical industry for various ailments, including digestive problems, skin irritation and coughs. Zinc plays an important role in the metabolic activities of plants and can affect the quantity and quality of medicinal plants. Osmopriming of seeds could be helping to increase germination, coming out of the soil, establishment, and growth of plants in the field conditions. The experiment was carried out as factorial based on a randomized complete blocks design. The first factor was  seed osmopriming with polyethylene glycol 6000 at four levels (control, -3, -6 and -9 bar) and the second factor was zinc foliar spraying from zinc sulfate source at four levels (0, 1, 2 and 3 g. l-1). Osmopriming on dry weight of the flowers and mucilage yield and zinc foliar spraying on dry weight of flower, number of seeds per fruit and mucilage yield had a significant effect. Treatments had no significant effect on 1000-seed weight. The interaction of osmopriming and zinc foliar spraying in the traits of the number of flowers and fruits per plant, dry weight of fruit, seed yield and mucilage percentage was significant. Foliar spraying 2 g.l-1 of zinc increased the mucilage yield and the flower dry weight, 46% and 57% compared to the control, respectively. The highest mucilage percentage was obtained from control treatments. Generally, the highest yield of flowers and mucilage was obtained from the middle levels of treatments (2 g. l-1 zinc sulfate and -6 bar osmopriming).

 the lack of water resources in arid and semi-arid regions is one of the most important limiting factors of the growth of plants, especially fruit trees. Grapevines are one of the most important horticultural products in the world as well as in Iran. The water content of plant tissues, their growth, and the availability of different nutrients in the soil are significantly reduced under water stress conditions. Therefore, the successful production of the plant under water stress conditions depends on the management of plant nutrition. By application of organic and chemical fertilizers, the physical, chemical, and biological properties of soil can be improved. Besides, it can reduce the adverse effects of drought stress conditions.    

 To evaluate the effect of compost, biochar, and potassium sulfate application on dry matter, relative water content (RWC), chlorophyll a, b, total, and carotenoid contents, as well as the concentration of macro-and micronutrients of leaves of grapevines ‘Bidane-Ghermez’ under two drought stress conditions, this experiment, was conducted in the research greenhouse during 2017-2018. The experiment was carried out as a factorial experiment based on a randomized complete block design (RCBD) with two factors and four replications. The first factor, without drought stress conditions (80% field capacity (FC)), and drought stress conditions (40% FC), and fertilizer treatments included potassium sulfate (1.25 g.kg-1), compost (5 % w/w), and biochar (10% w/w).
  

 The results of the analysis of variance (ANOVA) showed that the interaction effect of drought stress ×fertilizers application was not significant for dry matter, and RWC (P>0.05). Also, the results of ANOVA indicated that the simple effect of drought stress conditions was not significant for dry matter but the simple effect of fertilizer application was significant for leaf dry matter (P<0.01). Without drought stress conditions, there were no significant differences in leaf dry matter between different fertilizer treatments. However, under drought stress conditions, the highest dry matter of grapevine leaves was observed in biochar, compost, and potassium sulfate, respectively. Also, there were no significant differences in leaf dry matter of grapevine between biochar treatment under drought stress conditions and all fertilizer treatments without drought stress conditions. The simple effect of drought stress conditions was significant for leaf dry matter (P<0.05). The results of ANOVA revealed that the interaction effect of drought stress ×fertilizer application was not significant for chlorophyll a, b, total, and carotenoid contents of grapevine leaves. However, the simple effects of drought stress conditions and fertilizer application were significant for chlorophyll a, b, total, and carotenoid contents of grapevine leaves (P<0.01). Relative water, chlorophyll a and carotenoid contents of grapevine leaves were not significantly different among fertilizers treatments. The increase of chlorophyll a/b ratio compared with control was changed in order biochar>potassium sulfate>compost. Moreover, the interaction effect of drought stress ×fertilizer application was significant for nitrogen (N), magnesium (Mg), ferrous (Fe), zinc (Zn), and copper (Cu) concentrations of grapevine leaves (P<0.01). The ANOVA indicated that the simple effects of drought stress conditions and fertilizer application had a significant effect (P<0.01) on macro- and micro-elements concentrations of grapevine leaves. By application of biochar, the concentration of P, K, Mg, and Cu of grapevine leaves significantly were higher than compost and potassium sulfate applications. This consequently resulted in higher chlorophyll a/b ratio and dry matter of grapevine leaves in biochar treatment for control under drought stress conditions.

 Based on the results of this research, it can be concluded that the application of fertilizers reduced drought stress effects on biochemical characteristics and dry matter of grapevine leaves. According to the results, at first the application of biochar is recommended, then potassium sulfate and compost. Our previous results indicated that by application of compost, the available sodium (Na) of soil was increased 8.53 and 60.52 % for potassium sulfate and compost treatments compared to control, respectively. While, by application of biochar, the available Na of soil reduced 3.73 % in comparison with control. This finding is so important regarding the Na effects on soil structure, the toxicity of Na for plants as well as the interaction between Na and K. Considering K is a critical element to regulate the water content of plant tissue and reduces the hazards of water stress conditions, the higher concentration of Na prevents K uptake from the soil solution by plant.

Iron and zinc deficiencies are common in most limy soils of Iran. In order to study the effect of foliar application of iron and zinc on leaf and fruit nutrients concentrations of apple cultivar Gala an experiment was carried out as factorial based on randomized complete block design with three replications in Horticulture Research Station, University College of Agriculutre & Natural Resources, University of Tehran. The first factor was foliar application of zinc as zinc sulfate at three levels (0, 10 and 100 mg per liter) and the second factor was foliar application of iron as iron chelate at three levels (0, 100 and 1000 mg per liter). Results showed that the foliar application of iron and zinc had a significant effect on yield and leaf and fruit nutrients concentrations and increased the nutrient content of leaves and fruits. According to these results using iron increased yield, weight, iron, zinc and potassium content of leaves and the amount of iron, zinc, potassium, calcium and phosphorus of fruits also increased. Also zinc increased yield, TSS, zinc content of the leaves and the iron and zinc content of fruits. According to the results, the effect of treatments used on the leaves and fruits nitrogen content was not significant. This study showed foliar application of iron and zinc increased yield, quality and leaf and fruit nutrients concentrations of apple cv. Gala.

In order to evaluate of sowing date and fertilizers, super phosphate triple and zinc sulfate on quantitative yield of annual medics (Medicago scutellata cv. Robinson) in summer cropping, an experiment was conducted as split factorial arranged in completely randomized block design (CRBD) with four replications in crop season 2011-2012 research farm of agriculture faculty of Lorestan university in Khorramabad. The main factor was the sowing date in two level T1: (20th June) and T2: (16th July) and the sub factor was fertilizer super phosphate triple in three levels (P0=0, P1=150 æP2=250 kg.ha-1) and fertilizer zinc sulfate in three levels (Zn1=0, Zn0=50æ Zn2=100 kg.ha-1). The results showed that, triple interaction effects of sowing date, super phosphate triple and zinc fertilizer on the biological yield and 1000 seed weight were significant in 0.01 probable levels. Also triple interaction had significant effect on seed yield and harvest index in 0.05 probable levels. The mean comparison of the triple interactions on the biological yield showed that the highest biological yield (3504.6 kg.ha-1) was obtained in (T2P1Zn1). Therefore it is recommendable treatment in the annual medic to production of dry forage. Also the mean comparison of effects showed that highest seed yield (807.9kg.ha) was obtained in (T2P2Zn1) and lowest seed yield obtained in (T2P1Zn0). Therefore treatment (t2p1zn1) recommendable for production of dry forage and production seed treatment (T2P2Zn1) recommendable.

This study was carried out on the effect of iron and zinc foliar applications on quantity and quality trait of apple ‘Delbar estival’ fruit. The research experiment was carried out as factorial in a randomized complete block design with 3 replications on 8-year-old ‘Delbar estival’ apple trees on M9, trained to Y system in Horticultural Department, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. During growth season, iron chelate (Fe-EDDHA) in three levels (0, 50, 100 mg/l) and zinc sulfate in three levels (0, 5, 10 mg/l) were sprayed 30, 60 and 90 days after full-bloom. Harvested fruits were transferred to cold storage with 0±1˚C and 85-90% relative humidity and kept for 5 months. In order to measure the treatments effects on qualitative and quantitative fruit traits, samples were assessed at harvest time and monthly intervals during cold storage. Results showed that increased Fe concentration caused enhancement of fruit flesh firmness, vitamin C, soluble solids, antioxidant content and dry matter. Zn could increase vitamin C, soluble solids, dry matter but reduced flesh firmness and total phenols. It can be concluded that, iron and zinc application was suitable for improving the quality indexes for this apple cultivar.

Micronutrient deficit is the one of major factors in reduction of citrus yield and quality. This study was conducted to investigate the effect of pre harvest treatments of zinc and manganese sulfate on quantity and quality characteristics of Washington Navel orange fruit at harvest time as factorial experiment based on randomized complete block design with three replications. Experimental factors were spraying of zinc sulfate (0, 2, 4 and 6 g lit-1) and manganese sulfate (0, 1, 2 and 4 g lit-1) in two stages, the first stage,15 days before full bloom (March 2nd) and second stage15 days after full bloom (April 9th). Results indicated that both zinc sulfate and manganese sulfate could improve the quality of orange fruit in the time of harvest as compared to control. Although, sprayed fruits had higher fruit number, length, diameter and weight, juice content, total soluble solid (TSS), Vitamin C as compared to control. Most effective treatments in all factors were obtained in 4 g lit-1 zinc sulfate + 1 g lit-1 manganese sulfate. Over all, results showed that combined treatment including 4 g lit-1 zinc sulfate + 1 g lit-1 manganese sulfate, 6 g lit-1 zinc sulfate + 1 g lit-1 manganese sulfate and 6 g lit-1 zinc sulfate + 4 g lit-1 manganese sulfate had better results. Generally, both zinc sulfate and manganese sulfate improved fruit quality and quantity during the harvest time compared to the control.

In order to study the effect of humi potas and potassium sulfate on some morphological traits of Stockflower, this research was conducted at Research Farm of Shahid Chamran University in Ahvaz in 2015. This experiments was performed as factorial bassed on RCBD with three replications. Treatments included humi potas with 3 levels of 0, 500 and 1000 mg l-1 and potassium sulfate fertilizer with 3 levels 0, 50 and 100 kg / h. During growth period, Evaluated vegetative indices (length and diameter of stem, number and leaf area) In 6 stage at intervals every 21 days once and reproductive characteristics (Flower durability, number of days to flowering and seed yield per square meter) at the end stage of plant growth.Treatments with Humi potas were effective on the vegetative properties of stem diameter, leaf number and leaf area, and on the reproductive characteristics of days to flowering and Flower durability. Treatment with potassium sulfate was significant only on stem length and diameter characteristics. the interaction of Humi potas fertilizer and potassium sulfate also showed a significant effect on the growth characteristics of stem diameter, number and leaf area, Flower durability and seed yield. The highest stem diameter, number of leaves, leaf area and Flower durability were related to interaction treatment (1000 mg/l Humi potas and 100 kg/ha potassium sulfate). Overall, it can be said that the use of Humi potas fertilizer in combination with potassium sulfate fertilizer, in addition to improving the growth characteristics of Flower, can play a positive role in decreasing the use of chemical fertilizers and reducing environmental pollution.

Among the heavy metals, cadmium, because of high mobility and bioavailability in soil and also toxicity at low concentrations is very important. Cadmium (Cd) is known as carcinogen and can induce many types of cancers. Human activities (metallic industries, contaminated fertilizer, herbicides or insecticides, irrigation with contaminated groundwater, and use of contaminated sewage sludge) are largely responsible for accumulation of different levels of Cd in soil. Saint John’s Wort (Hypericum perforatum L.) is a medicinal plant and belongs to the family Hypericaceae which its extract, one of the best-characterized herbal medicines, known as the Cd-hyperaccumulator, is widely sold for the treatment of depression. Hyperaccumulator plants are species able to accumulate high amounts of heavy metals in their tissue at concentrations of 10 to 100 times higher than tolerated by crop plants. Zinc (Zn) is an essential element occurring in several enzymes, where it plays a catalytic or structural role. Cadmium and zinc have similar electron configuration, valence state as well as affinity to S, N and O donor ligands and thus their geochemical and environmental properties are comparable. The antagonism activity between Cd and Zn in the environment and their chemical similarity can lead to interactions between Cd and Zn during plant uptake, transport from roots to shoots, or accumulation in edible tissues. Ion exchange is one of the methods used for the removal of several toxic substances. In recent years, natural amendments, such as zeolite have been widely used to address trace metals contamination. Therefore, adding zinc and zeolite to the growth medium of plant can be moderating the toxic effects of cadmium.
This pot experiment was conducted at the Experimental Field of Ferdowsi University of Mashhad (FUM) from September 2013 to June 2014. Treatments consisted of three levels of cadmium (0, 10 and 20 mg Cd kg-1 soil), three levels of zinc (0, 25 and 50 mg Zn kg-1 soil) and three levels of Zeolite (Clinoptilolite) (0, 5 and 10g zeolite kg-1 soil) arranged in a factorial based on Randomized Complete Block Design (RCBD) with three replications. Cadmium sulfate (CdSO4·4H2O) and zinc sulfate (ZnSO4·7H2O) were purchased from MERCK company. The zeolite used in this research was collected from the Semnan mine, located in South of Semnan Province. After preparing the soil, the pots (30 cm in diameter with 18 kg capacity) were filled with 18 kg soil and thoroughly mixed with appropriate amounts of cadmium, zinc and zeolite diluted in distilled water. Seeds of H. perforatum L. cv. “Topaz” were obtained from the FUM Research Field. After 24 hours of soaking in tap water, the seeds were sown on the surface of moistened soil in each pot and germinated after 10 days. Following germination, the seedlings (about 1.0 cm high) were thinned and only 10 seedlings in each pot were kept. At the full flowering stage, these plants were harvested after 9 months. Plant height, root length, flowering stem and flower number, leaf area, relative chlorophyll and number of black nodules was measured. Chlorophyll (Chl) content were determined by leaf area meter (Li-Cor-1300,USA) and SPAD chlorophyll meter. Data were analyzed statistically by using JMP 8 and Excel software. The differences between averages were tested by Tukeyʼs test at P The results showed that increasing cadmium levels lead to significant decrease of 6.28, 3.45, 2.04, 5.49, 0.82, 15.71 percents in plant height, root length, flowering stem, flower number, leaf area and relative chlorophyll, respectively compared with control. In comparison to control, the number of black nodules in leaf significantly increased by 4.23 percent. Combined application of cadmium and zinc could significantly decline the effects of cadmium on plant height and root length. Meanwhile, interaction effect of cadmium and zeolite was detected significantly on root length and number of flowers. The results of three-way interactions for root length were superior in Zn0Cd0Z10 treatment. Cadmium is an inhibitor of uptake and accumulation of essential mineral nutrients, reduces conductivity of stomata andwater potential of cells and damaged photosystems; therefore, can decrease biomass production in stem, flower and root. The reduction of Chl content could lead to enzymatic degradation of these pigments or inhibition of their biosynthesis, which could be connected with Cd-induced deficiency of iron and zinc, decrease of magnesium content or cadmium bond to essential thiol groups in both the protochlorophyllide reductase protein and other enzymes involved in the light dependent synthesis of 5-aminolevulinic acid. Heavy metal stress with impact on biosynthetic pathways of pharmacologically active molecules can either increase or decrease them. Changes in black nodules number, containing hypericin and other secondary metabolites in H. perforatum in response to heavy metals can help us understand the role of this material in stress conditions. It could be assumed that high metal accumulating ability of plants producing specific secondary metabolites in H. perforatum could be also connected with chelation of toxic metals with mentioned substances.
Our results confirmed that the addition of zeolite and zinc presumably improved plant growth, because of increased availability of essential nutrient elements such as K, Mg, Ca, NH4, and micronutrients in presence of zeolite or decreased Cd sorption and transmission in presence of zinc.

The aim of this study was to evaluate the effects of purslane (Portulaca oleracea L.) on liver necrosis induced by copper sulfate in rats. Twenty-eight male rats were divided into four groups as follows: 1) Normal, 2) Toxicant control (CuSo4 was given orally (200 mg/kg b.w), 3) Purslane was given orally (400 mg/kg b.w) and 4) Toxicant purslane. At the end of the four weeks, all the rats were sacrificed and some biochemical parameters of serum such as alanine aminotransferase (ALT), aspartate aminotransferase (AST) and concentrations of alondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) in serum were estimated. CuSo4 significantly increased the levels of ALT, AST, and MDA and decreased the levels of CAT, SOD, and GPx in toxicant rats. The toxicant purslane group restored these changes to normal levels. Histopathological findings are consistent with biochemical findings. Purslane has a hepatoprotective effect on CuSo4-induced hepatic damage in rats and these effects might be contributed to modulation of detoxification enzymes and antioxidant and free radical scavenger effects.

In order to study the effect of different amounts of potassium silicate and potassium sulfate on growth traits of pistachio seedlings cv. Badami-E-Riz Kerman, an experiment was done as factorial with three factors, including two levels of salinity as source of NaCl (0 and 90 mM), three levels of silicon as source of potassium silicate (0, 50 and 100 mgL-1) and three levels of potassium as source of potassium sulfate (0, 1 and 2%), in compeletely randomized design with three replications. 45 days after the emergence of seeds, seedlings were exposed to salt stress foliar application of potassium silicate and potassium sulfate, both a week before and after starting salinity stress. The results showed that salinity decreased leaf relative water content, water use efficiency, leaf total soluble protein and increased electrolytes leakage, proline, soluble sugars, phenolic compounds in leaf and glycine betaine in leaf and root. Foliar application of potassium silicate and potassium sulfate increased leaf relative water content, water use efficiency, leaf total soluble protein, proline, soluble sugars, phenolic compounds and glycine betaine in leaf and roots, and reduced electrolytes leakage under salinity conditions. The most effective treatments were 50 mgL-1 potassium silicate and 2% potassium sulfate.

Calcareous soils with high pH in Jiroft region have caused difficulties in uptake of micronutrients, particularly iron (Fe), by strawberry plant. In the present greenhouse research, treatments consist of combination of different sources, application method and amount of iron application. Results showed that soil application of 10.5 kg/ha chelated iron (Fe-EDDHA) had the highest fruit yield, average fruit weight and vitamin C content. Based on the orthogonal comparison, in general, applying iron with any method of application and combination significantly affected most of the measured plant traits (with the exception of fruit acidity and vitamin C content). Therefore, regardless of the type and method of iron application, its application is necessary to increase yield and other quality parameters of the strawberry under greenhouses conditions in Jiroft region. Economic evaluation of the treatments showed that spraying iron sulfate and Fe-HEEDTA is not economically justified due to the costs imposed on greenhouse owner. Generally, soil application of Sequestrene-138-Fe is economically valuable, compared with spraying of iron sulfate and Fe-HEEDTA. Using 4.5 kg/ha Sequestrene-138-Fe has higher economic justification and higher profitability rate (1979.95% in comparison with 1345 and 1176.89%, respectively) compared to 7.5 and 10.5 kg/ha. Thus, soil application of 4.5 kg/ha Sequestrene-138-Fe (Fe-EDDHA) for greenhouse production of strawberry in Jiroft region, which have similar conditions to the present experiment, is recommended.

Date bunch fading disorder has been one of the most important problems, which caused economic damage to date plantation area of Iran. It has been first reported on Mozafti cultivar in Kahnuj area, Kerman province. It has often been observed on soft and mid ripening cultivars such as Mozafti, Mordaseng and Kalote. Furthermore, it usually appears on Mozafti cultivar when fruits change from Khalal to Rutab stage. The most important symptoms of this disorder are sudden wilting of fruits and necrotic strips on the upper surface of the main bunch stalk. Incidence and development of these symptoms increase by high temperature, low relative humidity, and hot and dry wind. Several research studies have been carried out on this disorder so far, but the only research about the effect of nutrition on disorder was performed by Rosta (2003). The aim of the present study was to investigate the effect of calcium and potassium spray on date bunch fading and some traits of date fruit in Rigan region, Kerman province.
The experiment was conducted based on randomized complete block designs with three replicates in Rigan located in east south of Kerman province, Iran, in 2012. Treatments were: T1: control, T2: spray of calcium nitrate at the concentration of 5 ppm, T3: spray of potassium sulfate at the concentration of 5 ppm, and T4: combined spray of calcium nitrate and potassium sulfate at the concentration of 5 ppm. Treatments were applied at Kimri, Hobabok and Khalal stages. Sampling was performed from 3 date palms (3 bunches from each date palm were selected randomly) at the second date harvest. Totally, the traits of 200 fruits were measured in each date palm. The traits measured in the present study were: fruit length, fruit diameter, fruit weight, stone weight, stone diameter, and bunch fading percentage.
According to the data of variance analysis, treatments had a significant effect on wet fruit weight, fruit length, fruit diameter, stone weight, stone diameter, and bunch fading percentage at 1℅ level. The highest wet fruit weight, fruit length, fruit diameter, stone weight, and stone diameter were attained in the treatment containing combined application of calcium nitrate and potassium sulfate. Furthermore, the lowest amounts of these traits were obtained in control. The lowest and highest percentage of date bunch fading belonged to the combined treatment of calcium nitrate and potassium sulfate, and control, respectively. In general, application of calcium nitrate and potassium sulfate with each other improved fruit traits and reduced bunch fading percentage. Calcium mobility in the plant takes place mainly in the xylem, together with water. Therefore, calcium uptake is directly related to plant transpiration rate. Conditions of high humidity, cold and low transpiration rates may result in calcium deficiency. Salinity might also cause calcium deficiency because it decreases water uptake by the plant. Since calcium mobility in plants is limited, calcium deficiency appears in younger leaves and in fruits, because they have a very low transpiration rate. Therefore, it is necessary to have a constant supply of calcium for continued growth. Calcium deficiency is usually caused by low calcium availability or water stress which results in low transpiration rates. Calcium is an essential plant nutrient with many roles including participation in metabolic processes of other nutrients uptake, promotion of proper plant cell elongation, and improvement of cell wall structure – calcium is an essential part of plant cell wall. It forms calcium pectate compounds which give stability to cell walls and bind cells together. It also helps protecting the plant against heat stress - calcium improves stomata function and participates in induction of heat shock proteins. In addition, it helps protecting the plant against diseases - numerous fungi and bacteria secret enzymes which impair plant cell wall. Stronger cell walls, induced by calcium, can avoid the invasion of diseases. Considering the important roles of calcium, calcium spray increased thetraits of date fruit and decreased bunch fading percentage. As an important element in photosynthesis, , potassium regulates the opening and closing of stomata, and therefore regulates CO2 uptake. Potassium plays a major role in the regulation of water in plants (osmo-regulation). Both uptake of water through plant roots and its loss through the stomata are affected by potassium. Moreover, protein and starch synthesis in plants requires potassium, so that the enzymes responsible for starch synthesis are activated by potassium. Potassium has also an important role in the activation of many growth related enzymes in plants. Results of the analysis of the studied soil showed that available potassium content in soil was less than plant requirement. So spraying of potassium sulfate could result in the improvement of date fruit traits and reduction of bunch fading disorder. Finally, combined spray of calcium and potassium caused a significant reduction in date bunch fading percentage.
The results of the present study indicated that spray of calcium and potassium solely improved fruit traits and bunch fading disorder, but maximum values of fruit yield components and minimum bunch fading percentage obtained from foliar spray of calcium and potassium together.

To study the effects of copper on quantitative and qualitative characteristics of basil, an experiment was conducted by hydroponics method. Experimental factors include solutions containing copper (copper sulfate or chelated copper) copper concentration (zero as control, 0.5, 1 and 2 per thousand of dissolved copper) and copper spraying time (2, 3 and 4 weeks after seedling emergence). Results showed that the effect of copper on the shoot fresh and dry weight (p

Foliar application of micronutrients is a useful technique for rapid absorption of minerals in the plants and avoids soil contamination. To evaluate the effect of foliar application of micronutrients (iron and zinc) on yield, yield components, and essential oil of fennel (Foeniculum vulgare Mill.), an experiment was conducted as factorial based on randomized complete blocks design with three replications at the Faculty of Agriculture, University of Zanjan during the growing season of 2012. In this experiment, the effect of foliar application of Fe (using ferrous sulphate) at four concentrations (0, 1, 2 and 3 gr.L-1) and foliar application of Zn (using zinc sulphate) at three concentrations (0, 2 and 4 gr.L-1) were investigated. Results showed that the majority of measured traits including number of umbels per plant, 1000-seed weight, grain yield, essential oil content and essential oil yield were significantly affected (p≤ 0.01) by combined application of iron and zinc. Therefore, the highest grain yield (2637.96 kg ha-1) was obtained in foliar application of Fe + Zn at a concentration of 0.2%. In addition, the highest essential oil content (2.88%) and essential oil yield (75.71 kg ha-1) were obtained in combined application of Fe 0.3% and Zn 0.2% and the lowest content of mentioned traits was obtained in control.

This experiment to study aim effect of different levels of plant density and zinc sulfate on quantitative yield of triticale and its rule on human and livestock feed was conducted at deh-sefid village of Khorramabad¡ in cropping year 2009- 2010 (November 13¡ 2009). The application of three levels of zinc sulfate (Control¡ 40 and 60 kg / ha) and three plant densities (200¡ 300 and 400 plant / m2) were combined factorially based on the randomized complete block desing with three replications. Results showed that interaction of density and different levels of zinc sulfate treatments on variables¡ such straw yield¡ economical yield (seed) and biological yield (1% prob) as harvest index (5% prob) were affected significantly. The higher production. The highest straw and seed yield (12810¡ 12770 kg / ha) was observed in200 and 300 plant / m2 to using 60 kg/ha zinc sulfate (d2f3 and d1 3)¡ biologic yield (22303 kg / ha) and harvest index (44.53%) was obtained from treatment 300 plant / m2) to using 40 kg / ha zinc sulfate (d2f2). Thus was concluded that minum and optimum of plant density (200 and 300 plant / m2) increased yield to ratio using fertilizer (40 and 60 kg / ha)¡ therefor¡ can proposed using fertilizer to further yield. The highest and lowest percent protein were obtained from treatments d3f2 (400 plant / m2. 40 kg / ha zinc sulfate ) and d2f2 (300 plant / m2 .40 kg / ha zinc sulfate) equal to 9.8 and 7.08 % respectively.