一、引言水稻的长期生产实践证明,数量足质量好的壮秧,是夺取水稻大面积均衡高产的重要物质基础。回顾水稻生产育苗方式的发展过程,先后经历了水育苗、湿润育苗、油纸保温育苗、隔离层育苗、塑料薄膜保温旱育苗,近年来又出现了开闭式薄膜保温旱育苗,由于育苗方式的不断改革,管理技术的不断提高,使水稻生产的播种期和插秧期大幅度提前,秧苗素质也有了 I. INTRODUCTION The long-term production practice of rice proves that the strong seedlings of sufficient quantity and good quality are the important material basis for seizing large-area, balanced and high-yield rice. Recalling the development of rice production and breeding methods, has experienced water and seedlings, wet seedling, oil and paper seedling insulation, isolation seedling, plastic film insulation dry nursery seedlings, in recent years there have been open and closed film insulation dry nursery seedlings, nursery means of continuous Reform, management technology continues to improve, so that the sowing date of rice production and planting a substantial advance in advance, seedling quality also has