玉米是一种需水量大而又不耐涝的作物。据观测，土壤湿度超过持水量的80％时，植株的生长发育即受到影响，尤其是在幼苗期，表现更为明显。玉米生长后期，在高温多雨条件下，根际常因缺氧而窒息坏死，造成生活力迅速衰退，植株未熟先枯，对产量影响很大。有资料表明，玉米一般 Corn is a crop that requires large amounts of water and is not resistant to waterlogging. It is observed that when the soil humidity exceeds 80% of the water holding capacity, the growth and development of the plant is affected, especially in the seedling stage, the performance is more obvious. Late corn growth, under high temperature and rainy conditions, rhizosphere often due to hypoxia and suffocation necrosis, resulting in a rapid decline in viability, unripe plants first dry, a significant impact on the yield. Data show that corn in general