采用低棚深沟肥床旱育秧的技术，培育迟中稻中大苗。结果表明，该技术能在夏季高温多雨条件下，省工节本地控制苗床温湿度，以利于秧苗旱育生长。旱育秧的叶龄、苗高、干重和单株分蘖数与同期水秧相近；苗高比水秧矮１／３；栽后３ｄ发根数比水秧多５０％。 Using low-shed deep groove bed dry seedling technology, cultivate late medium-sized rice seedlings. The results show that the technology can control the temperature and humidity of seedbed under the condition of high temperature and rainy summer and provincial section to facilitate the growth of nursery. The leaf age, seedling height, dry weight and number of tillers per plant in the dry nursery seedlings were similar to those in the same period. The seedling height was 1/3 less than the water seedlings;