应用生长率模型测算林分生长量的方法

提出一种新的测算林分生长量的方法，即根据经验方程Ｐ＝ａ／ｔ＋ｂｔ＋ｃ导算出不同地区各树种林分生长率计算公式，算出不同林龄林分生长率，再根据林分蓄积量即可推算出林分生长量。以油松树种为例分析了林龄与生长率的关系，不同立地条件对林分生长率的影响，进行了生长率模型的拟合，计算了公式拟合精度，编制出秦岭东部林区树种生长率表。

Estimating Stand Increment by Increment Percent Model

According to stand volume and stand increment percent estimated by experiential equation P=a/t bt c , stand increment could be deduced. Relationship among site condition, stand age and increment percent of Chinese pine was discussed and an increment percent model was regressed. Moreover, an increment percent table for tree species growing in the east Qinling Mountains was given