Optimal Coupling Combinations between Irrigation and Seeding Rates for Improving Production and Water Use Efficiency of Wheat Grown under Arid Conditions | ||
| Journal of Plant Production Sciences | ||
| Article 1, Volume 5, Issue 1, December 2016, Pages 1-11 PDF (1.42 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpps.2016.7390 | ||
| Author | ||
| Salah El-Hendawy | ||
| Department of Plant Production, College of Food and Agriculture Sciences, King Saud University, 11451 Riyadh, Saudi Arabia &Agronomy Department, Faculty of Agriculture, Suez Canal University, 41522 Ismailia, Egypt | ||
| Abstract | ||
| The sustainable use of water is becoming increasingly important for food security in arid and semi-arid regions with limited water resources. This study was conducted to determine the optimal coupling combinations between irrigation and seeding rates in order to achieve the high grain yield and efficient irrigation water use simultaneously for wheat grown under arid conditions. The experiment was conducted during 2013/2014 and 2014/2015 growing seasons to study the effect of three irrigation rates i.e. 1.00, 0.75, and 0.50 of the estimated evapotranspiration (ET) and five seeding rates i.e. 150, 250, 350, 450 and 550 seeds/m2 on yield components, grain yield and irrigation water use efficiency (IWUE). The results indicated that grain yield and yield components of Sakha 94 were gradually decreased by decreasing irrigation rates and increasing seeding rates. The values of IWUE and harvest index were decreased also by decreasing irrigation rate, while the highest values for both traits were achieved at 350 seeds/m2. The seeding rate of 350 and 250 seeds/m2 were most effective to obtain the lowest value for seasonal yield response factors under 0.75 and 0.50 ET, respectively. Based on the production functions of grain yield versus seeding rates for each irrigation rate, the optimum seeding rate for the maximum grain were 411 and 425 seeds/m2 for 1.00 ET, 362 and 378 seeds/m2 for 0.75 ET and 315 and 350 seeds/ m2 for 0.50 ET in the first and second season, respectively. | ||
| Keywords | ||
| Deficit Irrigation; harvest index; water production functions; yield response factor | ||
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