烟草是云南省重要的一种经济作物。漂浮育苗技术,是一种利用无土育苗技术人为最大限度地控制烟苗生长所需的肥力、温度、水分等环境因子,培育出根系发达、生长整齐、壮苗率高烟苗的实用技术。漂浮育苗系统提供了较为稳定的温、湿环境,但也为病菌侵染和蔓延提供了有利的条件,在整个育苗期还经过数次的剪叶,使其感染或者是病菌滋生的几率大大增加,在移栽后突然改变其生长环境,病菌便开始大量滋生。目 Tobacco is an important cash crop in Yunnan Province. Floating nursery technology is a practical technology for using soilless nursery technology to control the environmental factors such as fertility, temperature and water required for the growth of tobacco seedlings to the maximum extent and to cultivate a well-developed rooted tobacco seedling with high growth rate and strong seedling rate. Floating nursery system to provide a more stable temperature and humidity environment, but also for the infection and spread of germs provided favorable conditions in the entire seedling stage also after several times to cut leaves, so that their risk of infection or the proliferation of bacteria greatly increased , Suddenly changed its growth environment after transplanting, germs began to flourish. Head