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天山中东部林区,从解放初期开发以来,森林利用面积年年在缩小,采伐迹地面积年年在增大,目前为止,各林场迹地面积,约占森林面积的百分之十左右。特别是一些老林场,需要更新的迹地面积不下三万亩。使林相遭到破坏,森林失去了原有的生态平衡。有些地,变成草场,急需更新恢复森林。 “以营林为基础”的林业方针,在新疆林区已贯彻了廿多年。采伐迹地更新工作一从林九五七年开始,各林场作了不少工作,有成功的经验,也有失败的教训。有些场在同一块迹地上,年年更新,年年补植,累计更新面积很大,实际保存面积较小。追其原因:有的是更
Since the initial development of the liberation, the forest area in the central and eastern Tianshan Mountains has been shrinking year by year. The area of deforested land has been growing year by year. Up to now, the total area of forest land has reached about 10% of the total area of forest land. In particular, some old forest farms need to update the area of no less than thirty thousand acres. The forest was destroyed, the forest lost its original ecological balance. In some places, it becomes a grassland and there is an urgent need to renew the forest. The forest policy based on silviculture has been implemented for more than 20 years in the forest area of Xinjiang. Renewal work on deforested land Since the beginning of 1957, various forest farms have done a lot of work, with successful experiences and failed lessons. Some fields on the same track, updated every year, replanting every year, the cumulative update a large area, the actual preservation of the smaller area. Chase its reason: some are even more