فهرست مطالب m. h. gharineh

In order to investigate the effect of planting method and sugarcane residue compost fertilizer on morphological and physiological traits and grain yield of corn, a field experiment using a split-plot arrangement was accomplished in a randomized complete block design with four replicates in Mian-Ab, Shooshtar, south-west Iran in summer 2018. Experimental factors included four planting methods (on ridges, on watermark, in furrows, and on flat ground) as main factor in main plots and four amounts of sugarcane residues compost (0, 10, 20, and 30 t ha-1) in sub-plots. Results showed that the effects of planting method, sugarcane residue compost, and their interaction were significant on the leaf area index, plant height, ear height, SPAD, chlorophyll a, chlorophyll b, total chlorophyll, grains/ear, thousand grain weight and grain yield. Mean comparison showed that the maximum amount of the examined corn traits was obtained in furrow planting and using 30 t ha-1 of sugarcane residue compost and the lowest amounts were observed in ridge planting and absence of sugarcane residue compost. The highest grain yield (6497 kg ha-1) was achieved in furrow planting and presence of 30 t ha-1 of sugarcane residue compost and the lowest grain yield (3870 kg ha-1) was in ridge planting and absence of sugarcane residue compost. In general, it seems that furrow planting by providing better growth conditions and consumption of sugarcane residues compost fertilizer due perhaps to improvement in soil nutrient availability and moisture storage capacity increase the growth and grain yield of corn in Shooshtar region.

Dehydration and deficiency of nitrogen fertilizer are important factors in reducing the quantitative and qualitative yield of wheat. The use of appropriate cultivars and some agricultural operations can help reduce the damage of these factors. In order to investigate the effect of irrigation cut and different amonts of nitrogen fertilizer on some quantitative, qualitative characteristics and redistribution rate of photosynthetic materials stored in durum wheat plant, the present experiment was carried out in a statistical form of split -split plots in a randomized complete blocks design in three replications in Ramhormoz during 2013-14 cropping year. Experimental factors include three levels of irrigation cut in the spike stage, at the beginning of the seeding stage and full irrigation in the main plots, four levels of nitrogen (zero, 60, 120 and 180 kilogram per hectare of pure nitrogen from the urea source) in the subplots and two durum wheat cultivars Yavaros and Behrang were in the sub-sub plots. The results showed that irrigation cut and nitrogen fertilizer content treatments had a significant effect on quantitative, qualitative and redistribution rate traits of photosynthetic materials and there was also a significant difference between investigated wheat cultivars in terms of growth response to irrigation cut and nitrogen fertilizer content. The highest grain yield (3587.3587 kilogram per hectare), harvesting index and redistribution of total shoot (0.96 gram per plant) in Behrang cultivar with consumption of 180 kilogram per hectare of nitrogen fertilizer in full irrigation was obtained. In general, it can be said that reducing the effects of irrigation cut by balanced selection of nitrogen fertilizer and the correct choice of cultivar (Yavarus) can be a good opportunity to make optimal use of low irrigation techniques to combat water shortage.

Medical pumpkin (Cucurbita pepo L. var. Styriaca) contains valuable edible oils and compounds that are used to prevent and treat prostate cancer. To evaluate the effects of vermicompost (no application, 5, and 10 t ha-1) as the main factor, biological nitrogen (no application and application of Barvar 1), and biological phosphorus (no application and application of Barvar 2) as sub-factors on the yield and yield components of medical pumpkin, an experiment was conducted as a split-factorial based on a randomized complete block design with three replications in Islam Abad-e-Gharb, Kermanshah province, in 2015. Studied traits included male to female flower ratio, number of fruits plant-1, number of seeds fruit-1, average dry fruit yield, stem length, number of days to flowering, seed yield, and seed oil yield and percentage. Vermicompost had a significant effect on the number of seeds fruit-1, dry fruit yield, and flowering date. The highest oil yield (30 kg ha-1) was obtained from the combination of bio-phosphorus application and non-application of vermicompost treatments, and the highest seed yield (195 kg ha-1) was obtained from the combination of bio-nitrogen, non-application of bio-phosphorus, and non-application of vermicompost treatments. A combination of non-application of bio-phosphorus and bio-nitrogen and application of 5 t ha-1 vermicompost treatments resulted in the least male to female flower ratio (39); however, the highest one (66) was obtained in the combination of non-application of bio-nitrogen, application of bio-phosphorus, and  10 t ha-1 vermicompost. In general, the highest seed and oil yield was obtained from a single application of bio-nitrogen and bio-phosphorus fertilizers, respectively.

In order to increase the quality of agricultural products and improve healthy food production systems, application of organic fertilizers has become very important in agroecosystems. To investigate the effect of different concentrations and time of humic acid foliar application on the qualitative characteristics and shoot and grain micronutrients content of Triticale, an experiment was conducted at the Research Field of Agricultural Sciences and Natural Resources University of Khuzestan during the 2017-2018 growing season. The experimental design was a split plot based on the randomized complete block design with four replications. Treatments included the time of foliar application at four levels (tillering, stem elongation, flag leaf, anthesis) in the main plot and spraying concentrations at four levels (0, 200, 400 and 600 mg L-1) in the sub plots. The results showed that the foliar application of humic acid at the flag leaf and anthesis stages had the greatest impact on the plant physiological traits. The highest chlorophyll b content, leaf area index and total chlorophyll (SPAD) were obtained from the application of 600 mg L-1 humic acid and the highest chlorophyll a content was gained from the spraying of 400 mg L-1. The maximum grain iron (40.44 mg kg-1) was related to the spraying of 200 mg L-1   of fertilizer at the tillering stage. The highest protein yield (745.65 kg ha-1) was obtained from the foliar application of 200 mg L-1 humic acid in the flag leaf stage. The highest amount of manganese (30.73 mg kg-1) was related to the application at the stem elongation stage and the concentration of 200 mg L-1. Based on the findings of this study, humic acid foliar application can increase the accumulation of micronutrients in plant and improve the qualitative traits of triticale.

The seeds of oilseed plants are susceptible to deterioration and the seed power in oilseed plants decreases faster over the time. In order to evaluate the effect of salicylic acid and seed aging on germination characteristics and biochemical changes of Carthamus tinctorius L. cv. Soffeh seeds,an experiment was conducted as a factorial base on completely randomized design with fourand three replications for germination and biochemical characteristics respectively. The first factor was priming by salicylic acid include seven levels in 0 (distilled water), 50 and 100 ppm for 24 and 48 h in 15°Cand without priming (control)and secondary factor was combinations four levels of aging (0, 2, 4 and 6 days). Results showed that the interaction of priming and aging effects on germination rate, normal seedling percentage, abnormal seedling percentage, seedling length, length of seed vigor index, seedling dry weight, weight of seed vigor index and EC were significant, but on germination percentage, total protein, catalase and ascorbate peroxidase only affected by the main effects.Results showed that germination characteristics with increasing in the aging duration were reduced significantly and using priming germination characteristics were increased but protein, catalase and ascorbate peroxidase decline along with increasing seed aging. In the study, using priming treatment salicylic acid 50 ppm for 48 h had higher germination characteristics and antioxidant activity and soluble proteins in comparison with untreated or control of safflower seeds.

The aim of this researchwas to investigate the possibility of using image processing to determine the quality of seed germination after applying dynamic loads. For this purpose, mechanical damage at four levels (0.0404, 0.0808, 0.1212 and 0.1617) on three cultivars of chickpea seed (Azad, Hashem and ILC) were investigated. The study was conducted based on a completely randomized factorial design. The results showed that the ILC had the lowest electrical conductivity (12.02), the highest germination rate (10.31), the highest seedling growth (18.69), the most vigor (84.2), the maximum radicle length (13.29), radicle dry weight (0.574), hypocotyle dry weight (0.271) and the highest seedling dry weight (0.844) among other cultivars. Mean comparison of energy treatment showed that with inceasing energy level, germination quality and vigor were reduced. Then, length and area of radicle were evaluated using image processing. Based on statistical analysis, there was no significant difference between image processing and manual measurments. This shows the potential of replacement of time-consuming manual with image processing method for examination of seedling parameters

In order to study the effects of different waterlogging duration in growth stages ZGS11, ZGS13 and ZGS31 on root and shoot growth of three wheat genotypes Chamran, Vee/Nac and Yavaros, a pot experiment was carried out in the Ramin Agricultural and Natural Resources University in 2004. The experiment was a factorial according to a Randomized Complete Block Design with three replications. Study of root dry weight and root elongation trend showed different responses among genotypes, start of waterlogging periods and different waterlogging levels, as short period of waterlogging (10 days), had unrecoverable effects on the growth. Analysis of variance of root dry weight and root length at the anthesis and physiological maturity stages indicated significant different among all of treatments levels. Vee/Nac genotype was found superior with respect of root dry weight and root length to other genotypes. ZGS11 and ZGS31, had the highest and the lowest responses to waterlogging, respectively. Duration of 10, 20 and 30 days waterlogging at anthesis stage decreased 37.75, 44.31 and 54.01% of root dry weight, and 25.85, 47.02 and 58.88% of root length compared to control, respectively. Investigation of the root anatomy of wheat genotypes under waterlogging stress showed formation of cortical root aerenchyma as a waterlogging-resistantce mechanism.