该地区对一年生油松历年均采用覆土方法进行防寒越冬(以下简称土防)。即在当年10月下旬至11月上旬用土把松苗埋实,翌年4月上、中旬再把防寒土撤掉。其目的是防止苗木冬春被风吹失水而引起死亡。该法工序复杂、费工。笔者试图用灌水方法和药膜封闭气孔方法解决苗木防寒越冬问题。为此, In this area, the overwintering perennials of annual Pinus tabulaeformis are covered with cold-wintering winter (hereinafter referred to as earth-defense). That is, in late October to early November of that year, soil was used to solidate pine seedlings. In April of the next year, cold soil was removed again in the middle of the following year. Its purpose is to prevent seedlings from being killed by wind and water loss in winter and spring. The process is complicated and laborious. I tried to use irrigation methods and membrane stomatal closure methods to solve winter cold seedlings problem. to this end,