Evaluation of the effects of various wheat cultivars and different planting method under drought stress and normal irrigation conditions on yield and yield components of bread wheat
2008
Barati, V | Solhjoo, Ali Akbar | Dabiri, Mohammad Reza
Fars is the largest wheat producer province in Iran. In terms of planted area and output, wheat (Triticum aestivum L.) is the number one crop in Fars and currently almost all irrigated wheat is conventionally planted in narrow spaced rows or broadcasting on the flat and is irrigated by flood irrigation within bordered basins. Conventional flat planting for wheat has some disadvantages. In order to study the response of wheat genotypes to flat planting and bed planting under different irrigation regimes, experiments will be conducted in Darab Agricultural Research Station in the 2006-07 and 2007-08 growing seasons. The experimental design was split- split plot with three replications. Main factor was two irrigation regimes (W1: irrigation was applied normally, W2: irrigation cut of after flowering stage). Sub plots were two planting methods (FP: flat planting, BP: bed planting). Sub sub plots were four different wheat genotypes (Shiroudi-local check, S-83-3, S-82-10, and S-80-18). Based on results, post anthesis drought stress decreased grain yield and its components in all genotypes. Main reason of grain yield reduction in stress condition was reduction in grain number per spike and grain weight. S-80-18 produced the highest grain yield (5712 kg ha-1) in non-stress condition and the highest grain yield in drought stress (3148 kg ha-1) condition was belonged to Shiroudi cultivar. Bed planting method improved WUE (water use efficiency) by 21.7%. Biological yield and harvest index was positively affected by bed planting. These advantages and their interactive together, were found to increase grain yield by more than 13% in bed planting method
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