Effects of Regulated Deficit Irrigation on Water Consumption in Spring Wheat Field in Hexi Oasis Irrigation Region
The soil water consumption in 0～120cm layer in the spring wheat field,the correlations between the yield related variables and the phasic water consumption and soil water contents during different developmental stages under regulated deficit irrigation (RDI) in Hexi oasis irrigation region were analyzed.The results indicated that no significant difference was found between phasic and daily water consumption among different water deficit treatments and under various yield performance levels.Furthermore,the phasic crop water consumption ratio in total water use for spring wheat subjected to various RDI regimes performed similarly,minimized during both sowing to tiller and tiller to jointing and maximized during both jointing to booting and heading to filling.In addition,further timely,proper and strict soil water deficit during booting and heading of wheat could be exerted based on present study,without resulting in yield loss,while further decrease in soil water contents during wheat maturity not only would not result in wheat yield loss,but also would improve its water use efficiency and water supply use efficiency.
water consumption characteristics regulated deficit irrigation hexi oasis spring wheat
Zhang Buchong
Department of Water Resources Engineering,Gansu Agricultural University,Lanzhou,730070
国际会议
南京
英文
115-123
2006-08-16（万方平台首次上网日期，不代表论文的发表时间）