农作物综合抗旱性指标的评价

阐述了作物综合抗旱性指标的研究进展、各指标应用的局限性。目前评价作物抗旱性的综合指标都仅仅是从产量方面去考察，为此，本着作物产量与品质并重的原则，提出了作物的“综合抗旱指数”（CDI），数学表达式如下：CDI ＝（DC或DI×100＋I）/2。通过对两个水稻品种不同生育时期、不同程度的控水处理，发现长穗期综合抗旱指数最小，因此，长穗期不仅是水稻产量的水分敏感期，也是品质的水分敏感期。

Evaluation on comprehensive drought resistant index of crops

The advancement of comprehensive drought resistant index of crops and its limitation on application were explicated .Surveying from the yield in index of evaluating the drought resistance of crops at present, Principle which we regard as equally important in line with the yield and quality of crops ,comprehensive drought resistant index of crops were put forward, the expression formula of mathematics is as follows: CDI =(DC or DI *100+I) /2. Controlling water treatments (CWT) for the two varieties, Shangyu 397 and Suijing 3 of different soil water potential were carried out during different periods, comprehensive drought resistant index of panicle formation stage was the smallest. Therefore , water sensitive stage of yield and quality was panicle formation stage.