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天山云杉林区是新疆的水源林区,主要用材基地,但由于伐得多,迹地多,更新跟不上,问题突出.在摸索天山采伐迹地更新的道路上,林业战线的同志们做了许多工作,各场在各种迹地上都搞过人工更新,并取得一定经验.这些是我们讨论按适地适树原则继续提高更新质量,加速恢复森林的良好基础.要做好这一工作,还必须对更新迹地的类型及其特征,更新树种的自然分布和生长(包括混交林)规律,有一个基本的认识,然后才能使二者正确结合,这就是更新造林中科学方案的来源.亩更新400—200株,分布基本均匀).火烧迹地的天然更新一般是良好的,它存在三种更新方式:地形好的,小面积的云杉能直接更新;大面积的,当立地处于海拔2200米以下(有些地区略高些),需经阔叶林的演替过程,云杉才能更新良好;但在海拔2200米以上的区域,若种源有保证,云杉也可直接天然更新,如呼图壁的奇尤布尔湖就有一大片.至于大面积皆伐迹地和过伐迹地,实践
Tianshan spruce forest area is the water source forest area in Xinjiang, the main timber base, but because of the more cut, many traces, update keep up, the problem is prominent in exploration of Tianshan cuttings on the road to update, the forestry comrades done A lot of work and various field trials and experiences have been made and some experience gained.This is a good basis for us to discuss how to continue to improve the quality of renewal and accelerate the restoration of forests according to the principle of appropriate tree planting.To do this well, There must also be a basic understanding of the types and characteristics of the renewal sites, the updating of the natural distribution and growth of species, including the law of mixed forests, and then the correct combination of the two, which is the source of the scientific program for reforestation. Update 400-200 strains, distribution is basically uniform.) The natural renewal of the burned-out area is generally good with three updates: topography, small areas of spruce can be directly updated; large areas, standing at an elevation of 2200 Spruce can only be renewed well under the rice (slightly higher in some areas), and the spruce can be renewed well after the succession process of broadleaf forest. However, if the provenance is guaranteed in the area above 2200 meters above sea level, the spruce can also be directly renewed naturally. Hutu wall Qiyoubuer there is a large lake. As a large area Cutovers and over-felling sites, practice