摘要
分析了代根过低给森林采运作业带来的不利影响．阐述了伐根高度与根部形状的关系。为了研究伐木作业时伐根的适宜高度．引进了根形系数．并根据数理统计的原理．计算出白桦、红松、白杨、云杉和榆树５种树种的根形系数。由此得出结论、不同树种的根形系数不同；
To study the suitable heights of stumps as falling. the disadvantageous impacts of lower stumps onforest harvesting were analyzed, and the relations of stump heights and root shape coefficients were alsoexpounded. According to the principles of mathematical statistics, the root shape coefficients of five treespecies. namely. birch, Korean pine, popular. spruce and elm. were calculated. The results showed thatthe root shape coefficients were different with different species and that the suitable stump heights weredefined with the root shape coefficient of specific species.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1999年第4期42-45,共4页
Journal of Northeast Forestry University
