入梅以来的持续强降雨,造成长江中下游部分地区棉花渍涝,科学应对可以把因灾损失降到最低。1.抢排渍涝,清洗污泥因苗情、降水量、地势及排涝能力的不同,棉花遭渍涝的程度亦有所别,但抢排渍涝,缩短渍涝时间是减少损失的首要措施。对受渍涝的棉田做到边退水边扶正棉株,并用清水冲洗沾有泥浆的植物器官(茎、叶、蕾、铃),使其尽早恢复功能。2.分类管理,科学减灾(1)淹水时间超过3天的棉田,要及时改种其他作物。(2)受淹3天以内的棉田,不轻易改种其他作物,确保棉田面积。据试验研究,棉株淹水没顶3天的棉花,死苗率为47.7%;棉株叶片大部分脱落,但只要其主茎皮为绿色,主茎节上处于潜伏状态的腋芽被激活 Continuous heavy rains since plum blossom have caused cotton waterlogging in some areas of the middle and lower reaches of the Yangtze River, and scientific responses can minimize losses due to the disaster. 1. Scattered row of waterlogging, cleaning the sludge due to the situation of seedling, precipitation, topography and drainage capacity, the extent of cotton was also waterlogging, but grab row of waterlogging, shorten the time of waterlogging is to reduce the loss of primary Measures. Cotton fields affected by waterlogging should be reclaimed, and the cotton plants should be repaired. The muddy plant organs (stems, leaves, buds and bell) should be rinsed with water to restore their functions as soon as possible. 2. Classification Management, Scientific Disaster Reduction (1) Cotton fields flooded for more than 3 days must be replanted with other crops in a timely manner. (2) Cotton fields within 3 days of inundation will not be easily re-cultivated for other crops to ensure the area of ​​cotton fields. According to the experimental study, cotton plants were flooded without top for three days and the rate of dead seedlings was 47.7%. Most of the leaves of cotton plants were shed, but as long as the main stem bark was green, the axillary buds in the latent state on the main stem were activated