水稻品种在一个地区的生育期是品种的感光性、感温性和基本营养生长性在一定环境下的表现,是因种栽培的基础。所谓“感光性”,系指品种在缩短日照的条件下,能促进幼穗分化,提早抽穗的特性;“感温性”即是品种在温度增高的情况下,能促进抽穗的特性;“基本营养生长期”就是品种在当地适当短日照和适当高温条件下,还要进行一段营养生长,才能实现发育 Rice varieties in a region of the growing period is the variety of photosensitive, temperature-sensitive and basic vegetative growth performance in a certain environment, is due to the cultivation of the foundation. The so-called “photosensitive” refers to the species in the conditions of shortening the sunshine, can promote spike differentiation, early heading characteristics; “temperature-sensitive” is the variety under the conditions of increased temperature, can promote the characteristics of heading; “Basic Nutritional growth period ”is the species in the local appropriate short sunshine and appropriate high temperature conditions, but also for a period of vegetative growth, in order to achieve development