长江流域是“全国农业发展纲要”中规定粮食产量由四百斤到八百斤的主要地区,也是复种面积要达到百分之二百左右的主要地区,同肘也是我国水稻的主要产地,几乎有三分之二的面积和产量集中在这个地区。一九五八年水稻的产量占我国粮食总产量的百分之四十五,所以为了提前实现全国农业发展纲要,增加长江流域水稻的每亩产量和总产量,是有非常重大的意义的。长江流域的水稻栽培,在解放前,除湖南、江西、浙江的南部栽培有双季稻外, The Yangtze River Basin is a major area stipulated in the “Outline of National Agricultural Development” for grain output from 400 pounds to 800 kilograms. It is also a major area where the area of ​​multiple crops reaches about 200 percent, and is also the major producing area for rice in China. Almost Two thirds of the area and production are concentrated in the area. In 1958, the output of rice accounted for 45% of the total output of grain in our country. Therefore, in order to advance the implementation of the national plan for agricultural development and increase the output per mu of paddy in the Yangtze River Basin and the total output, it is of great significance. Before the liberation, in addition to the double cropping rice cultivation in the southern part of Hunan, Jiangxi and Zhejiang provinces,