Effect of Deficit Irrigation in Corrugation and Border Methods on Yield and Water Use Efficiency of Wheat cv. Hamoon

In order to determine the effects of deficit irrigation on qualitative and quantitative characteristics of wheat cv. Hamoon, an experiment was conducted with two irrigation treatments including closed-end border with cut back and corrugation method (as the main plots) and three amounts of irrigation treatments (in subplots) including full irrigation (T1), 75% of full irrigation (T2), and 55% of full irrigation (T3). The experimental design was a randomized complete block in a split plot arrangement in three replicates and was conducted at Zabol Research Station for 2 years. The measured parameters included height of plant and spike, number of seeds per spike, number of spikes per m2, weight of 1000 seeds, biological yield, seed yield, and water use efficiency. Results showed that irrigation methods did not have any significant effect on the abovementioned characters, but amount of irrigation treatment had significant effect on growth factors of plant. The mean of water use in full irrigation (T1), T2, and T3 were 4473, 3505, and 2730 m3/ha, respectively, and water use efficiency was obtained in the range of 0.95- 1.17 kg/m3. In general, the treatment of 75% of full irrigation in border method with water use efficiency of 1.15 kg/m3 and yield of 4040 kg/ha is recommended for deficit irrigation in Sistan region.