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杂交水稻具有根系发达,长势旺盛,穗大粒多,适应性广等优点,比常规品种显著增产,深受群众欢迎,近年来已在生产上,特别是晚稻生产上广泛应用.但由于结实率不如一般常规品种,空、秕粒较多,因此增产潜力没有充分发挥.为提高杂交水稻的结实率,我们从1978年开始即在这方面进行探讨.1980年,在以往试验基础上,继续对结实率影响面最大、关系全局的主要气象因子-安全开花结实温度指标作进一步的研究.现将试验结果整理如下.
Hybrid rice has developed root system, strong growth, spike large grain, wide adaptability and other advantages, significantly increased than conventional varieties, welcomed by the masses, in recent years has been widely used in production, especially in late rice. However, General conventional varieties, empty, nodules more, so the yield potential did not give full play to improve the seed setting rate of hybrid rice, we have been in this area since 1978. In 1980, based on previous tests, continue to bear fruit The rate of influence is the largest, the overall relationship between the main meteorological factors - safety flowering sturdy temperature indicators for further study now test results are summarized below.