论文部分内容阅读
由于历史的原因,我场现有森林绝大部分遭受过严重破坏,形成了大面积的过伐林。为了解和掌握过伐林采伐后林分质量的变化情况,于1981年冬对我场北沟营林区三个林班中的三个小班进行了调查。结果表明,过伐林择伐后其林分质量发生了很大变化。一、调查区林分概况和两次采伐位于我场的北沟营林区,在原13林班1小班、30林班1小班和31林班4小班内各设置
Due to historical reasons, most of the existing forests in our field have suffered serious damage and a large area of over-cut forests have been formed. In order to understand and master the changes of the stand quality after harvesting in the overburden, three small classes in the three stands of Beigouying forest in our field were investigated in the winter of 1981. The results showed that the quality of forest changed greatly after selective logging. First, the survey area overview and two logging in my field of Beigouying forest, in the original 13 forest classes 1 small class, a small class of 30 forest classes and 31 forest classes 4 small classes set