جستجوی مقالات مرتبط با کلیدواژه "سوپر جاذب" در نشریات گروه "زراعت"

This research was carried out in a completely randomized as potted experiment with eight treatments in order to investigate the effect of different fertilizers and super absorbent polymer on the growth of agave plant. Experimental treatments included two types of iron chelate fertilizer (foreign and Iranian), zinc chelate, complete fertilizer 20-20-20, complete fertilizer 15-5-30, complete fertilizer 12-12-36, super absorbent polymer and control. The results showed that the highest concentration of saponin was observed in the treatment of 12-12-36 (with an amount of 19756 ppm) and the lowest concentration was observed in the control treatment (10681 ppm). In terms of the amount of chlorophyll a, b and total chlorophyll, the 20-20-20 fertilizer treatment produced the highest amount, while the dry weight in the zinc fertilizer treatment was more than the other treatments. Although all fertilizer treatments increased dry weight compared to the control, no significant difference was observed between these treatments. According to the test results, it is recommended to use complete fertilizers as well as iron and zinc chelates in order to increase the amount of agave medicinal plant metabolites (especially saponin and hecogenin).

Proper management and the use of advanced methods to preserve and store soil moisture and increase water containment capacity are among the most effective measures to increase water use efficiency and thus improve the utilization of water resources of the country. Considering the importance of chickpea as a source of protein and, on the other hand, the irreparable damage of drought stress to chickpea performance, it is very important to adopt methods that can increase the plant tolerance to drought stress. Considering the importance of chickpea as a source of protein and, on the other hand, the irreparable damage of drought stress to chickpea performance, it is very important to adopt methods that can increase the plant tolerance to drought stress. Recently, the use of superabsorbent has increased due to the ability to absorb and maintain water and consequently increase water use efficiency in the soil. Therefore, the aim of this study was to determine the proper amount of diatomite to obtain maximum chickpea yield under drought stress conditions.

In order to investigate the effect of diatomite on some of the morphological and physiological characteristics of chickpea under different irrigation regimes, a test was conducted in Khaf in the year 1397-1396. This research was conducted as split plot based on randomized complete block design with three replications. The main factor of irrigation regimes was five levels (full irrigation, rainfed, one irrigation only in vegetative stage, one irrigation interval only at reproductive stage, two irrigation intervals, one vegetative stage and one reproductive stage) and factor The subdivisions of Diatomite were in three levels (0, 3.5 t/ha and 7 t/ha). Each plot had 6 planting lines at a distance of 30 cm from each other and 3 m long. In this experiment, diatomite was placed under the seeds next to the ridges at a depth of 20 cm (maximum root density area). Cultivation was done manually on the 15th of Esfand month with a density of 45 plants per square meter and a depth of 5 cm. In this experiment, native chickpea mass of Khaf region was used.

The results showed that changing the irrigation regime from full to dry farming irrigation reduced Height stem, stem diameter, Number of primary branches, Number of secondary branches, relative water content, seed yield and increased relative electrolyte leakage. Application of diatomite under different irrigation regimes increased all evaluated traits and seed yield. The application of 7 t/ha of diatomite compared to the non-application of diatomite increased 29, 29, 77 and 39 percent of seed yield in irrigation regimes, including dry farming, one irrigation in the vegetative stage, one irrigation in the reproductive stage, two irrigations included vegetative and reproductive stages. The results of interactions showed that the application of 7 t/ha of diatomite under irrigation treatment in the vegetative and reproductive stages in stem diameter, Number of secondary branches, relative water content and relative electrolyte leakage was significantly different from the application of 3.5 t/ha of diatomite. Only in seed yield under irrigation treatment in vegetative and reproductive stages, application of 7 t/ha of diatomite in the joint statistical group with application of 3.5 t/ha of diatomite was included, although it had a higher numerical value.

In general, using diatomite as a superabsorbent while saving the cost of production in arid areas, by maintaining and storing soil moisture and improving soil water permeability can be an effective step towards exploiting limited water resources. And increase grain yield in the harvest. It is also recommended to further study and use different amounts of diatomite in a certain range of moisture stress and also the effect of its use on the amount of nutrients in soil and water.

In order to evaluate the effect of application of natural zeolite and zinc sulfate on wheat yield, an experiment was conducted as a split plot in a randomized complete block design with four replications as a field in Jalilabad village of Pishva in Varamin region during 2019-2020 experimental year. Main factor included the treatment of natural zeolite (clinoptilolite) at three levels of zero, 10 and 20 ton/ha and the second factor included the treatment of zinc sulfate (36% zinc) at three levels of zero, 30 and 60 kg/ha. The results showed that the effect of natural zeolite and zinc sulfate alone and their interaction at the level of one percent on most of the studied traits were significant. In comparing the mean interaction of natural zeolite and zinc sulfate, maximum plant height, spike length, peduncle length, flag leaf length, number of seeds per spike, number of fertile spikes per square meter, grain yield, biological yield and protein percentage were obtained in the treatment of 20 ton/ha of natural zeolite with 60 kg/ha of zinc sulfate. The highest harvest index was obtained in the treatment of 30 kg/ha of zinc sulfate. None of the mentioned treatments had a significant effect on 1000/grain weight. Combined use of natural zeolite and zinc sulfate increased the yield of wheat by 67.1% compared to control.

Anethum graveolens L is used to treat colds, coughs, urinary problems, bloating, and spasms. Water deficit may cause significant changes in the yield and composition of essential oils of medicinal plants. In order to improve water stress tolerance of plants, various mechanisms have been proposed. The use of materials such as vermicompost, zeolite, superabsorbent and methanol can partially compensate for the lowering of yield from drought stress. Therefore, it is important to use methods that can tolerate plants under drought stress conditions.

To evaluate the effect of organic and chemical growth improvers application on yield and essential oil percentage of dill (Anethum graveolens L.) under water deficit stress conditions, a field experiment was conducted as split plot in randomized complete block design with three replications in Birjand, Iran, during 2017 growing season. The main factor included three levels of water stress (60, 120, 180 mm evaporation form class A pan) and the sub-factor included five levels of organic and chemical growth improvers; control (no application), zeolite (5 t.ha-1), vermi compost (6.5 t.ha-1), super absorbent polymer (100 kg.ha-1) and methanol (20 v/v).

The results showed that water deficit significantly reduced all studied traits except harvest index and essential oil percentage. Also, organic and chemical improvement agents had a positive and significant effect on plant height, number of umbrellas per plant, grain yield, biological yield and essential oil yield. Interaction of water deficit stress and organic and chemical improvement agents was significant on number of umbrellas per plant, number of seeds per umbrella, grain yield, biological yield and essential oil yield. By increasing the intensity of water deficit stress, the use of organic and chemical improvers increased the yield of seeds and essential oils. Under severe stress conditions and in comparison, with control treatment, super absorbent application increased the yield of seeds and essential oil to 34.43 and 37.27%, respectively, and methanol spraying increased the yield of seeds and essential oils by 34.17% and 42.85. The results of this experiment showed that the use of organic and chemical improvers reduced the damage to seed yield and essential oil yield under water deficit stress conditions. Also, the results revealed that when the plant is exposed to intensive stress, substances such as superabsorbent and methanol can be used to modify the stress. Using these materials under severe stress conditions increased the grain yield by 34% compared to the control. In order to achieve maximum yield of essential oil, use of organic and chemical improvers has been beneficial. Under severe stress conditions, methanol spraying and super absorbent application increased the essential oil yield of dill (Anethum graveolens L.) in Birjand region.

In order to achieve the maximum yield of essential oil, use of organic and chemical improvers has been beneficial. Under severe stress conditions, methanol spraying and super absorbent application increased the essential oil yield of dill (Anethum graveolens L.) in Birjand region.

inclusion of legumes in rotation to reduce chemical fertilizers has been of interest. The use of biological resources instead of chemicals can play an important role in maintaining fertility and soil biological activities; also increased the quality of agricultural products and ecosystem health. Applying mycorrhiza and superabsorbent as factors of preserving water and supplying nutrients for plants are important in dry farming.
The experiment was conducted in Lorestan province (Noor Abad city) as a split-factorial arrangement based on a randomized complete block design (RCBD) with three replications. Two different chickpea cultivars (‘Arman’ and ‘Azad’) were used as the main plot and superabsorbent polymer at three levels (0, 100 and 200 kg ha-1) and mycorrhiza at two levels (0 and 200 kg ha-1) were served as the sub-plots.
applying superabsorbent and mycorrhiza increased root traits and grain yield, however, when they were used together, their positive effects on the yield and root traits were more than they were applied separately. Regarding to the water resources shortage in the country, simultaneous using of mycorrhiza and superabsorbent; in addition to improving chickpea yield under rain-fed conditions, can provide bases for organic agriculture, system sustainability, finally more environment health.
Finding: Cultivars were not different according to considered traits. Using superabsorbent (200 kg/ha) increased biological yield (5.9%), grain yield (9.4%), root length (18.5%), number of nodules (19.7%) and root volume (21.9%). Results indicated that mycorrhiza application improved biological yield (4.7%), grain yield (4%), root length (12.8%), root dry weight (8.3%), and root volume (11.7%). The interaction of superabsorbent and mycorrhiza was statistically significant on biological yield, grain yield, root length, and the number of root nodules of chickpea.

Effect of super absorbent polymer, manure and potassium on the physiological and morphological characteristics of pumpkin (Cucurbita pepo) in drought conditions, split-plot experimental design with three replications in a randomized complete block design, at the Research Station of Sistan Dam located in the city of Zabol implemented. Treatments consisted of three irrigation regimes, to 5, 8 and 11 days of treatment, no use of manure as a source of potassium and super absorbent polymer (control) at a rate of 40 t ha farmyard manure, potassium (k2so4) to the extent 100 kg per hectare to 300 kg per hectare and super absorbent polymer as a minor, was considered. The results showed a very significant effect of treatments on RWC, chlorophyll a, b, chlorophyll, number of branches, the carotenoids, root biomass and root dry weight, respectively. Super Absorbent Polymer greatest impact on the number of branches, chlorophyll a, b and total chlorophyll a.Was obtained. The results of this study, none of the treatments had no significant effect on the amount of chlorophyll fluorescence.

Drought stress has an important role in yield reduction of crops. To investigate the effects of applying zeolite hydrogel (as a superabsorbent) in reduction of adverse effects of drought stress on chlorophyll content, nitrogen, growth indices and their relationships with quantitative and qualitative yield of pearl millet (cv. Nitrifeed), a split plot experiment (in space and time), based on randomized complete blocks design with three replications, was carried out at Research Farm of Shahid Bahonar University, Kerman, Iran, in 2011. Treatments included drought stress at four levels (irrigation at 40, 60, 80 and 100% of field capacity) as the main factor and superabsorbent hydrogel at three levels (0, 150 and 300 kg/ha) as the sub-factor. Results revealed that there was a positive and significant correlation (r = 0.97**) between chlorophyll content and leaf nitrogen percentage. Also, significant correlation was observed between these traits and forage fresh and dry weight of forage, protein yield and raw fiber percentage of the forage. As drought stress increased, the measured traits showed a descending trend. The superabsorbent polymer increased the fresh and dry weight of forage, growth indices and qualitative traits of pearl millet. Mean fresh weight of forage, chlorophyll content, protein content and percentage of fiber showed no significant difference between 100% and 80% irrigation levels. Superabsorbent application led to 20% water saving. Therefore, it can be said that superabsorbent hydrogel application under drought stress will improve yield, qualitative traits and growth indices of pearl millet through increasing soil water holding capacity, reducing nutrient leaching, fast and optimal growth of roots and better soil aeration.

In order to study the effect of IBA hormone and super observant (polyacrylamid) treatments on the rooting percentage of magnolia cv. Violet (Winter magnolia), an experiment was conducted in split- plot, based on RCD design with three replication, in green house of horticulture department, university college of agriculture and natural resources, university of Tehran. In this study, effect of tow factors, including tow levels of IBA hormone (0 and 3000 ppm) and four levels of super observant polymer (0, 0.4, 0.6 & 0.8 percentage) were considered. Semi woody cuttings of magnolia were potted in prepared medium after treatment with IBA. After that, pots containing treated cuttings were transferred the intermitted mist condition. Results showed that the percentage of rooting was significantly affected by IBA treatment but super absorbent had not significant effect. The results of this experiment indicated that maximum rooting percentage 26-66 by the IBA treatment, especially at 3000 ppm in combination with 0.8 % absorbent polymer treatment.