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东北北部地区春季缺水,初灌期短,用水集中。在稻田面积迅速扩大的形势下,水利工程不能赶上这种形势的发展,使得很多地区在水稻播种一个月后才能供应灌溉用水,严重的影响水稻生产。水稻出苗后灌水的方法是克服这种困难的农业技术。黑龙江省汤原县、依兰县农民在1949年已试行水稻旱种,效果良好。1956年黑龙江省水
The northern part of northeast China is short of water in spring and short in initial irrigation period, and the water is concentrated. With the rapid expansion of rice paddies, water conservancy projects can not keep up with the development of this situation, making it possible for many areas to supply irrigation water one month after sowing rice and seriously affecting rice production. The method of post-emergence rice irrigation is to overcome this difficult agricultural technique. Tangyuan County, Heilongjiang Province, Yilan County peasants in 1949 piloted dry cultivation of rice, the effect is good. 1956 Heilongjiang Province water