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一、水稻旱种技术的背景水稻是我国重要的粮食作物。但主要分布在长江流域及其以南各省。新中国成立后,在人民政府的领导下,兴水利,开水田,我国北方地区的水稻生产有了较快的发展,华北、东北、西北的稻田面积达三千万亩左右,较解放前扩大了一倍多。水稻面积的发展加重了水源不足的矛盾,一遇天旱少雨。水稻就难免大幅度减产。以北京市为例,1970年水稻面积92.1万亩,为1949年的15.8倍;总产32.1万吨,为1949的51.9倍。1970—1972年连续天旱,1973年面积下降到31.5万亩。总量10.6万吨,均减了三分之二,这是一次严重的教训。北方水稻生产的出路在哪里?六十年代,天津稻
First, the background of rice cultivation technology Rice is an important food crops in China. However, they are mainly distributed in the Yangtze River Basin and its south provinces. After the founding of new China, under the leadership of the people’s government, rice production in Xingshui and Kaiyuan, northern China had a rapid development. The paddy fields in North China, Northeast China and Northwest China had an area of about 30 million mu, which was larger than before the liberation More than doubled. The development of rice area aggravates the contradiction of lack of water resources, in case of drought and no rain. Rice will inevitably be significantly reduced. Take Beijing as an example. In 1970, the rice area was 921,000 hectares, 15.8 times that of 1949, with a total output of 321,000 tons, 51.9 times that of 1949. 1970-1972 continuous drought, in 1973 the area dropped to 315,000 mu. The total amount of 106,000 tons, both reduced by two-thirds, this is a serious lesson. In the 1960s, Tianjin rice