建国以来,为了改变我省森林分布不均、西木东调的不合理局面,党和政府重点在工农业生产比较发达,交通比较方便,人口稠密的昆明市郊、滇南及滇东北的一些地区建设了国营林场。经过近三十年的努力,几百万亩人工中幼林成长起来了。这些人工林对于保持水土、防风固沙,保障农牧业的发展起到了很大的作用。森林郁闭后,树木为了适应环境条件以 Since the founding of the People’s Republic of China, in order to change the irrational distribution of forests in our province and the unreasonable West-East transfer, the party and the government have focused on the construction of some areas in Kunming, Diannan, and northeast Yunnan where the industrial and agricultural production is relatively developed and the transportation is relatively convenient. State-owned forest farm. After nearly thirty years of hard work, millions of mu of artificial young and middle-aged trees have grown up. These plantations have played a significant role in maintaining the soil and water, preventing wind and sand, and ensuring the development of agriculture and animal husbandry. After the forest is closed, trees in order to adapt to environmental conditions