研究土壤水分状况对水稻生长与生理的影响,是确定合理灌溉的基础。在60年代,我国余叔文、倪文、崔澂和崔继林等曾在这方面做了大量工作。此后,我国有关水稻水分生理生态的研究报道甚少。70年代以来,国际水稻所的 K.T.Ingram、日本的小叶田等在抗旱品种的选育及其形态生理指标等方面进行了研究,但由于选取材料和试验条件不同,结论不尽一致。目前我国现用品种 (组合) 的株型和生育特点较60年代所用品种已有很大的变化,现用品种对土壤水分反应如何?其间有何差异?值得研究。特别是近年来由于“旱改水”的扩大以及工业用水剧增,使水稻生产的需水供水矛盾十分突出,因受旱而造成的水稻欠收已成 Studying the effect of soil moisture status on the growth and physiology of rice is the basis for determining proper irrigation. In the 1960s, Yu Shuwen, Ni Wen, Cui Wei and Cui Jilin in our country had done a great deal of work in this respect. Since then, little has been reported about the physiological and ecological status of rice in China. Since the 1970s, K.T.Ingram at the International Rice Research Institute, Japan’s Xiaobiantian, etc. have studied the breeding of drought-resistant cultivars and their morphological and physiological indices. However, the conclusions are not consistent due to the different materials and test conditions. At present, the plant type and reproductive characteristics of the current cultivars (combinations) in our country have changed a lot compared with the cultivars used in the 1960s. How are the cultivars responding to soil moisture? What is the difference between them? Especially in recent years, due to the expansion of “drought-relief water” and the dramatic increase of industrial water use, the contradiction between water supply and demand for rice production has become very prominent. As a result of the drought,