根据自然条件的分析,从无霜期的长短,4月份与10月份的平均氣温看来,长江流域一般都有条件种植双季稻的。四川瀘州起到上海为止,在农民中已经有试种成功的经验,而且在安徽省淮河以北徐家港亦已试种成功,这些事实充分说明长江流域以南单季稻改双季稻的可能性。为了推行这个行之有效的增产关键,除了作好思想动员工作以外,我们应特别注意解决在单季稻改双季连作稻後农业技术上产生的一些主要问题。现就今年水稻阶段发育研究工作谈 According to the analysis of natural conditions, from the frost-free period length, April and October the average temperature seems, the Yangtze River Basin generally have the conditions for the cultivation of double cropping rice. Luzhou, Sichuan Province has played a successful role in experimenting with farmers and has succeeded in trial planting in Xujiagang, north of Huaihe River in Anhui Province. These facts fully illustrate the possibility of changing single-crop rice to double-crop rice in the south of the Yangtze River Basin . In order to promote this effective key to increasing production, we should devote special attention to solving some of the major problems that arise from the single-cropping of rice and the double-cropping of rice after agro-technology in addition to the ideological mobilization. Now on the development of rice stage research work