摘要： 研究了抗旱能力不同的品种对反复干旱的生理反应及土壤、植株水分的供需关系，结果表明反复干旱法能够鉴定作物或品种的抗旱性，反复干旱后的存活率是作物或品种对干旱反应的综合结果，可以代表该品种的抗旱能力。还研究了反复干旱法用于小麦后期的抗旱性鉴定，结果与大田鉴定基本一致。

关键词: 农作物, 反复干旱, 生理反应, 土壤水分, 存活率

Abstract: The presented work studied the physiololgical base of repeated drought method.The paper illustrated that the repeated drought method can fully reflect the drough resistance of crops or varieties by physiological responses of drought resistant varieties in different degree,and the relationship between water supply and demand in soil and plant.The survival rate after undergoing the repeated drought is a comprehensive result of the drought reaction of crops or varieties.It can represent the drought resistance of the tested varieties.This paper also studied the appraisal of drought resistance of wheat varieties in later growing stages.The result of repeated drought method shows the same as that in the field.

Key words: Crop, Drought physiological response, Soil water, Survival rate

中图分类号: 

• S311