壮苗是瓜菜类作物早熟、优质、丰产的基础。传统的早春直播,就地搭棚育苗移栽的育苗方式已不适应现代农业生产的要求。特别是晋北地区,无霜期短,春季风沙大,倒春寒屡屡发生,传统的育苗方法根量少,伤根严重,移栽后不定根难以形成,瘦弱的 Strong seedlings are melons vegetables early, high quality, high yield basis. The traditional live broadcast in early spring, local scaffold nursery transplanting seedling breeding methods have not adapted to the requirements of modern agricultural production. Especially in the northern part of North China, the frost-free period is short, the sandstorm in spring is large, and the late spring cold often occurs. The traditional methods of seedling emergence are few, the root is serious, adventitious roots are difficult to form after transplanting,