جستجوی مقالات مرتبط با کلیدواژه "proline" در نشریات گروه "اقتصاد کشاورزی"

In order to investigate the effect of using superabsorbent polymer on some growth parameters and performance of chickpea under drought stress conditions, a factorial experiment was carried out in the form of a randomized complete block design with four replications in the crop year of 2021 in Horand region of East Azarbaijan province. The experimental treatments include three levels of irrigation (full irrigation as a control, mild water restriction or irrigation interruption in the pod setting stage, and severe water restriction or irrigation interruption in the flowering stage) and different amounts of superabsorbent (no use of superabsorbent, 50, 100 and 150 kg/ha), respectively. The results of the analysis of variance of the studied traits showed that the application of stress and the effect of using superabsorbent polymer on all the evaluated traits were significant at the probability level of 1%. The interaction of drought stress and superabsorbent polymer on plant height, leaf chlorophyll content, number of pods per plant, grain yield and biological yield at the probability level of 1% and had no significant effect on other traits. so that the highest grain yield (1710.94 kg.ha-1) was given to the treatment (full irrigation and 150 kg.ha-1). The results showed that with increasing drought stress, the values of physiological traits such as chlorophyll content and relative water content of leaves decreased, but proline content of leaves increased. If the use of superabsorbent significantly increased the physiological traits. According to the obtained results, the superabsorbent reduced the damage caused by drought.

In order to evaluate the physiological and biochemical characteristics of rapeseed (Brassica napus L) cultivars in terms of irrigation interruption and delay planting date، an experiment was implemented in two crop years as a factorial split-plot in the form of a randomized complete block design with three replications in Karaj region. In the present study، irrigation in two levels including normal irrigation (80 mm evaporation from Class A evaporation pan) and irrigation cut-off from the stage of sowing and pod formation stages in two levels including Sep، 26 and Oct، 26 was placed in main plot and four winter rapeseed cultivars including Tassilo، Elvise، Neptune and Okapi were placed in subplots. According to the results، the highest content of chlorophyll in both planting dates (Sep. 26 and Oct. 26، respectively، with values of 1.59 and 1.88 mg. g-1 FW) and under normal irrigation conditions belonged to Elvise cultivar. The results showed that irrigation cut-off reduced the relative water content of leaves and increased leaf proline، soluble protein content and soluble carbohydrate content. Elvise and Neptune cultivars had the highest grain yield under normal irrigation conditions with 3346 and 3220 kg / ha، respectively، and under irrigation cut-off conditions، with a mean of 3211 and 3081 kg / ha، respectively. According to the Stress Tolerance Index (STI)، Elvise cultivar was identified as the most tolerant cultivar under dehydration stress in the pod formation stage onwards.

This experiment was conducted in Karaj as split plot in a RCBD with 3 replications in 2017. The experimental treatments included irrigation management at three levels: irrigation with surface brush, sub surface (15 cm depth), and atmospheric and backyard in the main plot and irrigation management at three levels: 50, 100 and 150 mm evaporation from the pan in subplots and application of titanium dioxide nanoparticles in three levels: zero (control), 2 and 4 mg/lit in sub-sub plots. The results of this study indicated that divergence method (sub surface type) can be used to optimize the use of water resources to reduce irrigation losses and achieve high yield in corn production. Application of irrigation management of subsurface ribbon barrels along with titanium dioxide nanoparticles of four milligrams per liter in corn fields reduced 85% of weeds. Result showded that corn and weed competition reduced tissue texture and allocated photosynthetic sources to seed more than stems and corn leaves. Also, the use of titanium dioxide nanoparticles increased the activity of antioxidant enzymes and corn yields. The highest yield in this treatment was obtained at 10450 kg/ha.

In order to assess the response of ajowan to drought stress that induced by PEG 6000 on germination and growth stages, two separate experiments that in each useed completely randomized design with three replications were done. In first experiment, the response of germination of ajowan seeds was investigated to different levels of drought stress include osmotic potential of zero (control), - 1.5, -2, -2.5 and -3bar that prepared by PEG6000. The second experiment was same first, but in this experiment, morphological and physiological characters of ajowan in different level of drought stress were evaluated. Results of Anova at our data showed that drought stress has significant effect (p≤0/01) on germination characters such as germination percentage, germination rate, height of plumule, length of radicle, dry weight of radicle and plumule. Mean comparison of treatments showed, with increase in drought stress, all the above characters have been reduced. Morphological traits such as leaf area, fresh and dry weight of shoot and root and shoot dry weight ratio to root decreased under drought stress.

This study was carried out to evatuate the effects of combined application of chemical and biological Potassium fertilizer, on biochemical characteristics and grain yield of corn hybrids under drought stress conditions in 2015 and 2016 years in Dehloran city. The experiment was conducted as split-split plots in a randomized completely block design (RCBD) with three replications. The main factor consists of three levels of stress,optimum irrigation, irrigation cut in 12 leaf stage and irrigation cut at the corn flower emergence stage, Sub-factor contains of three levels of potassium: application of 100% fertilizer requirements as Potassium sulfate fertilizer, application of 70% Potassium sulfate fertilizer along with 30% Pta-Barvar-2 bio-fertilizer, 50% Potassium sulfate fertilizer along with 50% Pta-Barvar-2 bio-fertilizer and sub-sub- factor contains of three corn hybrids: AS71, NS640 and CORDONA. The results of compound analysis showed that the interaction between year, drought stress, fertilizer and hybrid were significant on chlorophyll content, proline and grain protein at 1% probability level. Also, the interaction of drought stress, fertilizer, hybrid had significant effects on the enzyme superoxide dismutase, potassium grain and grain yield. Also, Application of biological and chemical potassium fertilizers under drought stress had a positive effect on biochemical characteristics and grain yield. Based on the interaction between treatments, the highest grain yield (12230 kg.ha-1) was found in 50% potassium fertilizer + 50% fertilizer Peta Fertilizer in hybrid AS71 under favorable irrigation conditions and the lowest grain yield (4616 kg.ha-1) obtained by NS640 hybrid and 100% chemical fertilizer application and by the irrigation cut at the corn flower emergence stage.