2022
DOI: 10.52547/jast.24.6.1487
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Effects of Different Water Stress Levels on Biomass, Root Yield, and Some Physiological Parameters of Sorghum

Abstract: This study was conducted under water stress conditions for two years (2017-2018) to investigate the effects of different water stress levels on biomass yield, root yield, root/shoot ratio, some physiological characteristics, Water Use Efficiency (WUE), seasonal water consumption, and yield reduction ratio of silage sorghum. Experiments were conducted in randomized blocks design. There were four different irrigation treatments including I 1 : Full irrigation; I 2 : 75% of I 1 ; I 3 : 50% of I 1 , and I 4 : 25% … Show more

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“…The exposure of the plant to moisture stress also reduces the amounts of irrigation water that the plant receives, which has a significant effect on the leaf area, where it leads to a reduction in the number of leaves and reduces the ability of the plant to elongate, this agrees with [16]. It can be inferred from figures (3,4) the effect of reducing water quantities on the dry weight of the root, as the full irrigation treatment (FI 100%) gave the highest value for the root weight amounting to 277.73 g. It reached 272.82 and 269.06 g. Because of the deficit water and the water stress to which it was exposed, the stress reduced the average dry weight of root for the deficient irrigation treatments of 60, 50, and 40%, in which the dry weight values of the roots decreased, reaching 84.20, 70.12, and 69.74 g for the treatments, in order, since 70% of the root weight of the grain Sorghum bicolor crop is concentrated in the layer from 0-15 cm, Where the root spread is in the layer with high moisture content and the decrease in the amount of irrigation, the number of spreading roots decreases [17].…”
Section: Grain Yieldmentioning
confidence: 89%
“…The exposure of the plant to moisture stress also reduces the amounts of irrigation water that the plant receives, which has a significant effect on the leaf area, where it leads to a reduction in the number of leaves and reduces the ability of the plant to elongate, this agrees with [16]. It can be inferred from figures (3,4) the effect of reducing water quantities on the dry weight of the root, as the full irrigation treatment (FI 100%) gave the highest value for the root weight amounting to 277.73 g. It reached 272.82 and 269.06 g. Because of the deficit water and the water stress to which it was exposed, the stress reduced the average dry weight of root for the deficient irrigation treatments of 60, 50, and 40%, in which the dry weight values of the roots decreased, reaching 84.20, 70.12, and 69.74 g for the treatments, in order, since 70% of the root weight of the grain Sorghum bicolor crop is concentrated in the layer from 0-15 cm, Where the root spread is in the layer with high moisture content and the decrease in the amount of irrigation, the number of spreading roots decreases [17].…”
Section: Grain Yieldmentioning
confidence: 89%