mohammadhossin rahimian; hamidreza zabihi
Abstract
In order to investigate the effect of different amounts of municipal compost and super absorbent polymer on yield of tomato (Solanum lycopersicum) and water use efficiency in greenhouse a factorial experiment was conducted with two factors in randomized complete block design in four replications in Khorasan ...
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In order to investigate the effect of different amounts of municipal compost and super absorbent polymer on yield of tomato (Solanum lycopersicum) and water use efficiency in greenhouse a factorial experiment was conducted with two factors in randomized complete block design in four replications in Khorasan Razavi Agriculture and Natural Resource Research and Education Center (torough station). First factor was four levels of compost including (C0=0, C15=15%, C30=30% and C50=50% weight of soil) and second factor was super absorbent polymer at four levels including (G0=0, G5=5, G10=10, G15=15 gram per pot). All fertilizers according to soil test as well compost and super absorbent polymers were used before planting. Pots were irrigated at 50% allowable moisture depletion. Results showed that interaction effect of Hydro gel and compost on yield of tomato was significant and the highest yield was 3520 (gr/pot) obtained from C30G0 treatment. The lowest yield was 1588 (gr/pot) and obtained from C50G15 treatment. Results showed that interaction effect of Hydro gel and compost on water use efficiency was significant too, and the highest WUE was 57.97kg/m3 obtain from C30G0 treatment and the lowest WUE was 15.64 kg/m3 Obtained from C0G15.The best of interval irrigation obtained from C50 treatments equal 8 days. According to the results and beneficial effects of compost on growth and yield of tomato use of compost I preparing of bedding of greenhouse tomato is recommended.
m.h r; m gh
Abstract
In order to optimize use of water resources with selection of suitable wheat genotype(s) and irrigation schedule, in this experiment, the effect of elimination of irrigation at terminal growth and development stages of five wheat genotypes was investigated in two successive growing seasons (2002-03 and ...
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In order to optimize use of water resources with selection of suitable wheat genotype(s) and irrigation schedule, in this experiment, the effect of elimination of irrigation at terminal growth and development stages of five wheat genotypes was investigated in two successive growing seasons (2002-03 and 2003-04) in the agricultural research station of Torogh Mashhad. Split plot experiments were used based on randomized complete block design with three replications. Irrigation treatments were allocated to the main plots as: W1: irrigation at stem elongation, flowering, milky, and doughy stages; W2: irrigation at stem elongation, flowering, and milky stages; and W3: irrigation at stem elongation and flowering stages. Five wheat genotypes including: C1: Toos, C2: C-78-4, C3: C-78-8, C4: C-79-6, and C5: C-79-16 were assigned to the sub plots. Results showed that the effect of irrigation treatments on biological yield (BY), grain yield (GY), thousands kernel weight (TKW) and water use efficiency (WUE) were significant. Elimination of irrigation in grain filling period i.e. milky and soft dough stages, decreased BY (4.17% and 12.1%, respectively) and GY (5.14% and 11.9%, respectively). The mean GY of bread wheat genotypes under W1, W2, and W3 irrigation treatments were 5834, 5549, and 5215 kg/ha, while WUE values were 1.022, 1.426 and 2.346 kg.m-3, respectively. Although elimination of irrigation in the critical periods of developmental stages (grain filling) of wheat had positive effects on WUE, it had negative effect on GY and, therefore, is not recommended. C4 and C5 genotypes had the highest GY and WUE (1.814 and 1.748 kg.m-3, respectively). However, C4 and C5 genotypes were more tolerant to terminal water stress.