Azimeh Bagheri; Ataalah Siadat; Ahmad Koochekzadeh; Mohammad Reza Moradi Telavat; Masoud Rafiee
Abstract
In order to investigate the physiological responses of chickpea cultivars to supplemental irrigation and super-absorbent polymer use, an experiment was conducted in 2015 using a split factorial experiment based on randomized complete block design in the research farm of Khorramabad Agricultural Research ...
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In order to investigate the physiological responses of chickpea cultivars to supplemental irrigation and super-absorbent polymer use, an experiment was conducted in 2015 using a split factorial experiment based on randomized complete block design in the research farm of Khorramabad Agricultural Research Center. Factors were supplemental irrigation times (without supplemental irrigation, irrigation in 50 percent of flowering and irrigation in 50 percent of seed filling) as main factor and cultivars (Arman, Azad and Greet) and super absorbent polymer (zero, 100 and 200 kg/ha) in the sub plots. The result showed that the supplemental irrigation and super absorbent polymer reduced soluble carbohydrates and seed protein and increased insoluble carbohydrates, chlorophyll a, chlorophyll b and total chlorophyll. Supplemental irrigation in 50 percent of flowering satge increased 74 percent of seed yield compared to dry land condition. The highest seed yield, biological yield and harvest index were obtained from Greet cultivar with supplemental irrigation at 50 percent of flowering stage and application of 200 kg/ha super absorbent polymer, with the averages 2179 kg/ha, 4012 kg/ha and 54.3 percent, respectively. The results showed that at all levels of supplemental irrigation, the use of superabsorbent polymer improves plant growth conditions and, consequently, significantly increased seed yield. This will increase further by increasing the consumption of super absorbent polymer within supplementary irrigation.
Mohammad saeed Hasanvandi; Masoud Rafiee; Azimeh bagheri
Abstract
Growth analysis is a valuable method in the quantitative analysis of crop growth, development and cropproduction. In order to evaluate effects of nitrogen rates and plant density on physiological growth indicesof safflower, an experiment was conducted at Khorramabad, Lorestan province in 2008. The experimentwas ...
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Growth analysis is a valuable method in the quantitative analysis of crop growth, development and cropproduction. In order to evaluate effects of nitrogen rates and plant density on physiological growth indicesof safflower, an experiment was conducted at Khorramabad, Lorestan province in 2008. The experimentwas carried out as split plot in basis of randomized complete block design with four replications. Threenitrogen application rates were as main plots (N1=control, N2=75 and N3=150 kg/ha net nitrogen) andplant density was as sub plots in 3 levels (D1=40, D2=50 and D3=60 plant/m2). The growth degree dayindex was used to examine more closely fitting growth curves using non-linear regression models.Appropriate model was selected for each growth index. The results showed that application of nitrogenled to increasing of growth indexes including leaf area, total dry matter and crop growth rate. But, netassimilation rate was reduced. Growth indexes such as, leaf area, total dry matter, did not change withincreasing plant density, due to branching of safflower. However, crop growth and net assimilation ratewere reduced in plants. Overall, the results show that applied nitrogen has a more positive effect onsafflower growth index compared to density changes.