RESPONSE OF TWO SORGHUM CULTIVARS (Sorghum bicolor (L.) Moench) TO WATER STRESS UNDER  FIELD CONDITION 1-EFFECTS ON GRAIN YIELD, YIELD COMPONENTS, CONSUMPTIVE USE AND WATER USE EFFICIENCY

A. H. Ahmed, S.; H. Baker, R.; A. Muhemmed, D.

	RESPONSE OF TWO SORGHUM CULTIVARS (Sorghum bicolor (L.) Moench) TO WATER STRESS UNDER FIELD CONDITION 1-EFFECTS ON GRAIN YIELD, YIELD COMPONENTS, CONSUMPTIVE USE AND WATER USE EFFICIENCY
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 19, Issue 7, 2014, Pages 0-0
Authors
S. A. H. Ahmed; R. H. Baker; D. A. Muhemmed
Abstract
To study the effect of deficit irrigaton water on grain yield, consumptive use and water use efficiency of two sorghum cultivars (Sorghum bicolor (L.) Moench), a field experiment was conducted at the College of Agriculture, Abu Graib, (latitude 32.2 N, longitude 44.2 E and altitude 34.1m) during the fall seasons of 2004 and 2005. The experiment was arranged in a split-plot design with four replications. Control treatment (S1 a depletion of 50% of available water] and three other treatments S2,S3,S4 which represented 75%, 50% and 25% of the water amount of the control respectively. All these treatments were assigned in the main plots whereas cultivars (Inqath and Kaffir-2) were assigned in the sup-plots. The results showed that Irrigation treatment (75% watering amount of the control) could saved on average 1576.35 m3 amount of water/ha in both seasons without any significant reduction in grain yield compared with that of the control treatment which gave the highest grain yield (10.91, 9.78) ton/ha in the first and the second season respectively. However watering with 50% and 25% amount of water of the control treatment caused a reduction in grain yield reached on average 32% and 54% respectively compared with that of the control treatment. 75% and 50% watering treatment gave the best water use efficiency (1.75, 1.85) and (1.68, 1.70) kg/m3 in the first and the second season respectively compared with the control treatment which gave (1.63, 1.38) kg/m3 at the two seasons respectively .Significant difference between cultivars were reveald" Inqath"gave the best grain yield 8.64 and 8.28 ton/ha, in the first and second season respectively compared with Kafir-2 cultivar. Also the same cultivar gave the best water use efficiency for grain yield (1.9 and 1.79) kg.m-3 in the first and second seasons respectively. Maximum water consumptive use was reached for control treatment of ''Inqath "(729) mm. and Kafir-2( 688.5) mm/season.

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