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RESPONSE OF SOME BREAD WHEAT CULTIVARS Triticum aestivum L.TO WATER STRESS UNDER FIELD CONDITIONS 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. A. Abdu; S. A. H. Ahmed; R. H. Baker | ||
| Abstract | ||
| A field trail was carried out at the experimental farm college of Agriculture, Abu Graib (latitude 32.2º N, longitude 44.2º E), during winter seasons of 2001-2002and 2002-2003. Soil texture was silt loam classified as Torrifluvent. The objective of this study was to determine the effect of treatment water stress on grain yield, yield components, consumptive use and water use efficiency of five bread wheat cultivars Triticum aestivum L. The experiment was arranged in a split- plot design with three replicates, water levels which consist of control treatment (a depletion of 50% of available water) and three other water depletion treatments (75, 50 and 25% of the water amount of the control). All these treatments were assigned in the main - plots while cultivars assigned in the sub-plots. No significant differences were revealed between the control treatment and 75% watering treatment of the control in grain yield in both seasons which produced about 6.8 ton/ha and 4.9 ton/ha in the first and the second season respectively. Therefore a 696.9 m3/ha and 490 m3/ha amount of water/ha could be saved without any significant reduction in grain yield. However a reduction of about 11% and 14% of a grain yield from the control treatment was detected when a 50% of watering treatment was applied with 1416 m3/ ha and 1080 m3/ ha of water could be saved in both seasons respectively. Irrigation treatments (75% and 50%) of the control treatment uses water much more efficientcy to produced grain per m3 of water (1.84 and 2.11) and (2.07 and 1.94) kg grain/ m3 than that of the control treatment. Significant difference mong cultivars in grain yield were revealed. IPA 99, Abu-Graib-3 and Ashore gave the highest grain yield, IPA 99 had the best water use efficiency (2.08 kg/ m3) in the first season whereas Abu-Graib 3 gave the highest value (2.15 kg/ m3) in second season. However Adnania 1 and Iraq cultivars had the lowest water use efficiency for grain for the first and the second season respectively. | ||
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