塞罕坝机械林场位于内蒙古高原的南部,每年春末夏初,由于西伯利亚寒流南下,造成短时内大幅度降温现象即霜冻。对苗圃刚刚开始萌发或长出幼嫩新梢的留床红皮云杉苗产生程度不同的冻害,如我场三道河口苗圃和大梨树沟苗圃八四、八五两年,其苗木受害率达30%,严重影响了苗木的使用价值,造成了较大的经济损失。为此本文将冻害防护研究的有关情况简介如下。 Saihanba Machinery Forest Farm is located in the south of the Inner Mongolia Plateau. At the beginning of spring, summer and early summer, due to the cold flow of Siberia southward, it causes frost to freeze rapidly in a short period of time. On the nursery has just begun to germinate or grow young shoots of red bed spruce seedlings have different degrees of frost damage, such as my field three mouth estuary nursery and Daliushuogou nursery eight or eight two two years, the seedlings victims Rate of 30%, seriously affecting the value of seedlings, resulting in greater economic losses. In this paper, the frost damage prevention research on the situation below is as follows.