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为了探索棉花地膜平盖育苗的增产效应及其培管特点,以改进目前推广应用的薄膜支架育苗,达到省工降本增收的目的。1983～1984年试验在本所进行。以育苗的不同播期为主要处理,以支架育苗为对照。1983年
In order to explore the plastic film flat cover nursery yield-increasing effect and its characteristics of culture, in order to improve the current promotion of the use of film stent nursery, to achieve the purpose of reducing costs and income. 1983 ~ 1984 test carried out in our home. Seedling of different sowing date as the main treatment to bracket nursery as a control. 1983