“种子落地,管字当先”。苗床管理的核心是合理调控床内的温度与湿度,促进棉苗快生健长,形成壮苗。壮苗是早发的基础,壮苗的具体指标可概括为:苗高3～4寸,真叶2～3片,叶绿无病斑,茎粗子叶肥,苗茎红绿各一半,侧根多而白。总结多年的育苗实践,培育壮苗的技术措施可归纳为“四促四防”。一、增温足湿促齐苗,防高温烧苗苗床从播种至棉苗子叶平展期,要充分发挥塑膜增温保湿的作用,形 “Seed landing, tube word first ”. The core of seedbed management is to reasonably regulate the temperature and humidity inside the bed to promote fast growth of cotton seedlings and to form strong seedlings. Strong seedling is the basis of early onset, strong seedling specific indicators can be summarized as: 3 to 4 inches high seedlings, true leaves 2 to 3, leaves no disease spots, stems cotyledons, stems red and green halves, lateral roots More white. Summary of many years of nursery practice, nurturing seedlings of the technical measures can be summarized as “four promote four defenses.” First, the warming foot full wet Qi, anti-high-temperature seedling burn seedling beds from sowing to cotton seedling extension period, we must give full play plastic film warming moisturizing effect, shape