森林资源连续清查中未测采伐量测算方法

在森林资源连续清查中，按照一般的未测采伐量测算方法，考察了不同树种及径阶采伐木对未测采伐量的影响，而忽略了采伐木斯初蓄积在各年度间的梯度分布和某一年度内生长季节前后采伐量不均匀分布的影响。研究认为，上述4个月因素应同时考虑，并导算出相应的计算公式。从举例说明的结果看，在不同条件下测算的未测采伐量比综合考虑4个因素的未测采伐量分别偏大9．9％－37．4％。表2参6

Calculating method of unmeasured cut in continuous forest inventory

In continuous forest inventory(CFI),according to normal calculating method of unmeasured cut,it is considered that the unmeasured cut is affected by different psecies of tress and classes cut,but which ignored that the beginning foest stock of cut distrbutes with gradient on per year and does unevenly before and after the growing season in a certain year.As a result of study,authors thought that the four factors should be considered together,then guided corresponding calcuating formula.From the result of examples,we can see the calculated unmeasured cut in different conditions is higher between 9 9% to 37 4% than it in the condition based on the four factors.