干旱区生态环境知识资源中心

In order to popularize and apply technology of the corn regulated deficit irrigation in Northeast Semi-arid Region and achieve efficient use of water resources, the test was carried out to deal with different degrees of water deficit processing of corn in different growth stage, and studied the effects of Regulated Deficit Irrigation on maize’s water consumption, yield and water use efficiency (WUE). The results showed that: in terms of the regulated deficit irrigation of each growth stage, the heavy drought will affect the yield greatly during tasseling periods, while the water deficit had little effect on the yield in seedling stage. It showed a downward opening parabola relationship between the yield and water consumption, and if the maize is short of water in the jointing stage, the yield would be significantly decreased. It needs to be dealt with water deficit of maize appropriately, and the best irrigation treatment mode is the moderate water deficit in the seedling stage ( the upper limit of water control was 60%).