秀优57杂交稻是20世纪80年代从东北引入我区的一个高产、稳产、优质、抗病品种,深受广大农民朋友的欢迎。该品种属晚熟品种,分蘖力极强,对光照、温度比较敏感。但2004年种植的该品种部分田块表现出不同程度的减产,主要原因是:第一,育秧期推迟。秀优57杂交稻是一晚熟品种,在我区生育期为155d,如果育秧期推迟到4月10日以后, Xianyou 57 hybrid rice is a high-yield, stable yield, high-quality and disease-resistant variety introduced from the northeast in the 1980s in the 1980s. It has been well received by farmers and friends. The varieties are late-maturing varieties, strong tillering ability, more sensitive to light and temperature. However, some of the plots planted in 2004 showed different degrees of yield reduction, mainly due to the following reasons: First, delayed seedling raising. Xiulao 57 hybrid rice is a late-maturing cultivar with a growing period of 155 days in our district. If the seedling-raising period is postponed until April 10,