多效唑是一种高效植物生长调节剂 ,广泛应用于杂交中、晚稻水育秧 ,其主要作用是有效控制秧苗高度 ,促进根系生长和提高低节位分蘖 ,增加叶绿素含量，达到培育壮秧、增产的目的。但多效唑在晚稻塑盘旱育抛秧中试验和应用 ,则处于起步阶段 ,目前试验研究报道尚少。湖北省监利县 Paclobutrazol is an efficient plant growth regulator, widely used in hybridization, late rice watering seedlings, its main role is to effectively control the seedling height, promote root growth and increase low-node tillering, increase chlorophyll content, to cultivate strong seedling, yield purpose. However, paclobutrazol in late rice plastic tray drought nursery throwing in the trial and application, is in its infancy, the current experimental study is still reported. Jianli County, Hubei Province