选取与油松蓄叶量相关的年平均高生长、冠幅、轮枝层数、危害龄4个因子,推导出多元非线性方程。利用微机,采用逐步回归的方法建立了数学回归模型,并在两个样本的实际应用中达到了较高的精度,此模型解决了松毛虫对油针枝叶危害达到任意水平时的蓄叶量计算问题。 Four factors including average annual height growth, crown width, number of rotation branches and damage age, which are related to leaf storage volume, were selected to derive multivariate nonlinear equations. The mathematical regression model was set up by using step by step regression method and the precision of the two samples was reached. This model solved the calculation of the leaf volume of pine caterpillars when the harm of the branch pin of oil pin reached any level problem.