目前，我国北方冷凉稻区有相当数量面积的稻田水源匮乏。特别是近年来，随着工业和城市生活用水的大幅度增长，水资源不足与发展稻作生产的矛盾日益严重。尤其是在春季水稻育秧，插秧和分蘖等时期，需水与枯水的矛盾十分明显。这就大大限制了水稻面积的扩大和单产的提高。针对 At present, there is a shortage of water resources in paddy fields in a large number of cold-paddy rice areas in northern China. Especially in recent years, with the substantial increase of water for industrial and urban living, the contradiction between water shortage and the development of rice production has become increasingly serious. Especially in the spring rice seedling, transplanting and tillering period, the contradiction between water and dry water is very obvious. This greatly limits the expansion of rice area and yield. against