水稻是我国主要的粮食作物之一，我国幅员辽阔，南北气候差异很大，所以在栽培技术上南北方也有很大的差异。南方诸省的早稻烤田期常与梅雨季节相吻合，所以烤田工作常受到影响，造成无效分蘖多、茎秆细、易倒伏，严重影响早稻的产量.为了克服影响产量的因素，1990年我们按照省 Rice is one of the main food crops in our country. Because of its vast territory and large difference in climate between North and South, rice is also greatly different in cultivation techniques. The early rice paddy fields in southern provinces coincide with the rainy season, so the work in the field is often affected, resulting in more invalid tillers, thin stems and easy lodging, seriously affecting the yield of early rice.In order to overcome the factors that affect the yield, We follow the province