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前言我省早稻生育后划的高温干燥气候是严重影响水稻生产的一大自然灾害,以七月上、中旬频繁出现的高温火南风尤为突出。到目前为止,国内、外科学工作者主要在水稻生育后期高温伤害的敏感期,高温对植株生理代谢过程的影响以及高温伤害机理等方面做了一些有意义的工作。前人的研究表明:高温影响实粒率的敏感期在乳熟前期,而影响千粒重的敏感期在乳熟后期。佐藤(1973、1978)研究了灌浆结实期间高温对植株的碳水化合物、含氮量等方面的影响,认为:单穗茎中的TAC含量经高温处理后减少,但千粒重减少的程度越
Preface The high temperature and dry climate planted in early rice after birth in our province is a major natural disaster that seriously affects the rice production. In particular, the high temperature fire south southerly wind that appears frequently in the upper and middle of July is particularly prominent. So far, domestic and foreign scientists have done some meaningful work mainly in the sensitive period of high temperature injury in the late rice growth stage, the impact of high temperature on plant physiological metabolic processes and the mechanism of high temperature injury. Previous studies have shown that the sensitive period of high temperature affecting the grain rate is in the early stage of milk ripening while the sensitive period affecting the 1000 grain weight is in the late stage of milk ripening. Sato (1973, 1978) studied the effect of high temperature on the carbohydrate content and nitrogen content of the plants during grain filling. The results showed that the content of TAC in single-ear stems decreased after high temperature treatment, but the degree of thousand-grain weight decrease