王广平“水稻三旱一稀覆膜栽培法”因地制宜选择高产优质良种２育秧在旱育稀植的基础上有两点改进（１）加大育秧密度，一般每平方米播稻种０．１５～０．２ｋｇ；（２）在炼苗前增加３～４ｄ的冻苗时间。即在２叶１芯时，在太阳落山时把苗床两头薄膜放开，在早晨重新盖好... Wang Guangping “Three dry and one thin film of rice cultivation method” according to local conditions to choose high-yielding high-quality seed 2 nursery seedlings in the dry planting thinning on the basis of two improvements (1) increase the density of seedling planting, 0.2kg; (2) increase in frying seedlings 3 ~ 4d before frying time. That is, in 2 leaves 1 core, when the sun sets the seedbed two film release, re-cover in the morning ...