春玉米不同灌溉定额条件下抗旱指数的运用研究

以18个玉米品种为材料,研究了不同灌溉定额条件下不同品种玉米产量特性和抗旱指数的关系。结果表明:不同水分和不同品种间的产量差异均极显著。不同灌溉定额条件下抗旱指数均和无灌溉条件下产量显著相关。中玉9号抗旱指数最高。干旱条件下有限灌溉可使玉米产量有较大幅度增长。抗旱指数较高的沈玉18、屯玉38在中灌溉条件下产量已达到或接近试验条件下的高点。

The Study of Index of Drought Resistance for Maize Under Different Water Stress

The relation between yield characteristic and index of drought resistance of 18 maize varieties on different irrigation ration was studied. The results showed that there were obvious differences on drought resistance among the varieties and different soil water conditions. The index of drought resisting on different irrigation ration was obvious correlation with the yield without irrigation. The index of drought resisting of Zhongyu9 was the biggest. Greater increase of corn yield could be achieved by finite irrigation in drought condition. The yield of Shengyu18 and Tunyu38 whose index of drought resisting was higher could be reached or approached to the highest point in this experiment on the middling irrigation ration and the purpose of water economizing and high yield was obtained.