近几年来,随着种植制度的调整改进,我们江苏省水稻低温危害有所减轻,但因气候的年际变化较大,水稻穗花期的低温危害仍然存在。如1979年仅徐州地区就有17.8万亩水稻抽穗开花期遇到低温危害,致使结实率和千粒重都明显下降,严重地影响了产量。1981年,苏 In recent years, with the improvement of cropping system, the damage caused by low temperature of rice in Jiangsu Province has been alleviated. However, due to the large interannual variation of climate, the low temperature damage of rice paddy still exists. For example, in 1979, only 178,000 mu of rice in Xuzhou area experienced low temperature damage during heading and flowering, resulting in a significant drop in the seed setting rate and 1000-grain weight, which seriously affected output. In 1981, Su