水稻品种的生育期長短,在选种引种和栽培上,都很重要。支配品种生育期的因素不仅是品种的遺傳性,并且和环境条件、栽培条件等都有关系,特別是和栽培地区的日照長短、温度高低等,关系更为密切。 在国內外有不少的水稻研究工作者,認 The length of rice growth period, the introduction of selection and cultivation, are very important. The factors controlling the growth period of the cultivars are not only the hereditary nature of the cultivars, but also the environmental conditions and cultivation conditions. In particular, they are closely related to the length of daylight, temperature and other factors in cultivated areas. There are quite a few rice researchers at home and abroad