推广杂交水稻已有十年历史,原种生产已经历了一个从简单到复杂的发展过程。1979年余江会议前后是分步提纯法,1981年长沙会议以后主要是同步提纯法,1982年2月由江西、广西、四川、福建、湖南五省共同起草了一个规程。现在南方各省有各种方法,四川的“三 The promotion of hybrid rice has ten years of history, the original species production has undergone a simple to complex development process. In 1979, the Yujiang Conference was a step-by-step purification method. After the 1981 Changsha Conference, it was mainly a synchronous purification method. In February 1982, a regulation was drafted jointly by Jiangxi, Guangxi, Sichuan, Fujian and Hunan provinces. There are various methods in the southern provinces nowadays, and the “three in Sichuan.”