我区由于冬季低温时间长,昼夜温差大,干燥多风,常造成幼龄果树越冬伤亡,使幼龄果树越冬伤亡成为制约我区经济林发展,致使经济林不能及时发挥效益的主要原因和症结。我们从92年开始,尝试用地膜覆盖越冬,经过两年多的探索、实践,证实切实可行,现就主要技术措施总结如下,供各地参考。 Due to the long time of low temperature in winter, the large temperature difference between day and night and the dry and windy conditions, the overwintering injuries and deaths of young fruit trees are often caused in our region. The overwintering casualties of young fruit trees have become the main reason and crux of the problems that restrict the development of economic forest in our region. Since 92, we tried to cover the wintering with plastic film. After more than two years of exploration and practice, we have proved that it is feasible. The main technical measures are summarized as follows for reference.