摘要
本文通过对６块样地１００多株被伐木的倾斜角、借向角、上口高度、下口高度等的调查、计算与分析．得出几点主要结论：在直立树的情况下．随着借向角β的增加．上口高度Ｈ１、下口高度Ｈ２及上、下口高差ｈ０的平均值都在增加；当α、β同时存在时．随着α、β角的增加．Ｈ１、Ｈ２和上下口高差的绝对值｜ｈ０｜的平均值都在增加。而ｈ０的平均值逐渐减小．这是由于下口高于上口的情况在增加、也就是ｈ０为负值的情况在增加。
The guiding angle β, leaning angle a. the heights of guide cuts H1 and the felling cats H2 are investigated and analyzed of more than 1000 fell trees in six sites. The research results show: to the straight trees. H1 and H2. as well as the average values of the difference of the heights of two cuts ho are increased with the increase of β; when β and α are occurrence to the same tree, with the increase of α. and β. the H1. H2 and the absolute value of h0 are increased while the average value of h0 is reduced.
出处
《森林工程》
北大核心
2001年第1期14-15,17,共3页
Forest Engineering
