我区冬季气候寒冷,当年所育的树苗容易遭受冻害,因此在入冬以前(冬至前后),应对针叶树和一些抗寒力差的阔叶树幼苗采取防寒措施,以保证其安全越冬。经常采用的幼苗防寒措施主要有三种:(一)覆土防寒。即利用土壤掩盖幼苗达到防寒目的。覆土的时间应在苗木停止生长、土壤冻结以前3—5天进行。覆土时用犁或锄 In winter, the winter weather in our district is cold. When the saplings were bred in the year, frost damage would easily occur. Therefore, before winter (before and after the winter solstice), conifers and some hardy hardwood seedlings should be cold-protected to ensure their safe wintering. Often used three measures of cold-resistant seedlings: (A) Cover cold. The use of soil to cover seedlings to achieve the purpose of cold. Covering the time should stop growing seedlings, soil freezing 3-5 days before. Cover with plow or hoe