【摘要】 通过对银杏(Ginkgo biloba)、香樟(Cinnamomum camphora)、楠木(Phoebe zhennan S.Lee et F.N.Wei)挂牌古树在不同立地条件下的树龄与胸径的测定,分别用几种主要的回归方程对树龄和胸径之间的关系进行拟合,结果标明,三种树种在生长环境优、中、差的条件下,树龄与胸径之间均存在较好的相关性,并找出最优的回归方程。更多还原

【Abstract】 This paper measured tree age and breast-height diameter of marked Ginkgo,Camphor,and Phoebe under different site conditions in Chengdu,and fitting the relationship between tree age and breast-height diameter through main regression equation.The results indicated that three tree species showed significant correlation between tree age and breast-height diameter under different site condition,and coming up with the optimal regression equation.更多还原