标准差法在森林立地质量评价中的应用——用标准差法编制恩施州马尾松人工林地位指数表

Application on Standard Deviation's Methods in Forestry Site Judgment——The Making of The Site Index Tables for Plantations of Pinus massioniana in the Enshi State By Standard Deviation's Methods

为了研制恩施州马尾松人工林地位指数表,对恩施州的8个县市进行马尾松人工林标准地调查.利用调查资料拟合的树高——年龄导向曲线回归方程为:H=101.39-7.32/A,其离回归标准误SH/A=1.0m,相关系数r=-0.996.由拟合的树高——年龄导向曲线回归方程和外业调查资料,用标准差法编制出14-30龄阶的10-18地位指数的马尾松人工林地位指数表.本表较好地反映了当地马尾松人工林的生长和立地条件的关系,对恩施州林业生产经营有较好的指导和参考意义.

To make the site index tables for plantations of Pinus massioniana in the Enshi State, we had conducted investigations to the standard grounds in 8 representative countries and towns. By investigated data and calculations we have obtained that the curve regression equation of tree height-age relations is H = 10^1.39-7.32/A, the regression standard mistake of estimate is that SH/A = 1.0 m, correlation coefficient ： r = - 0. 996. Then I have made the site index tables for plantations of Pinus massioniana which contain the site indexes from 10 to 18 gradations between 14 and 30 age gradations by the curve regression equation of tree height-age relations and field investigated data. These tables reflect the relations between local Pinus massioniana plantations＇ growth and the site factors very much, and have good leading and consulted functions to forestry productions and managements in the Enshi Regions.