土壤物理性质与林木生长关系的研究

本文应用多元逐步回归方法。研究土壤物理性质与杉木、马尾松的生长关系。研究结果表明,不同成土母岩发育的土壤对杉木、马尾松生长的相关性和影响生长差异的主导因子不同:花岗岩发育的土壤主导因子是容重、非毛管孔隙度和腐殖质层厚度;砂岩发育的土壤主导因子是土层厚度、非毛管孔隙度和腐殖质层厚度。在湿润的南岭山地,非毛管孔隙度对杉木、马尾松生长的影响远比总孔隙度大,同时林木要求土壤的非毛管孔隙度占总孔隙度的比例要适当。

STUDIES ON THE RELATIONSHIP BETWEEN THE GROWTH OF CHINESE FIR AND MASSON PINE AND SOIL PHYSICAL PROPERTIES

The relationships between the growth of Chinese Fir and Masson Pine and soil physical properties havc been studied by the method of multivariate stepwise regression analysis. The results are as follow:The relationships were significant. The soil developed by different parent rocks had different influence on Chinese Fir and Masson Pine's growth and their major effective factors were also various. The major factors of the soil developed from granite were volume weight, non-capillary porosity and humus depth. The major factors of the soil developed from arenite were soil-layer depth, non-capillary porosity and humus depth. In the humid Nanling mountains area, the influence of soil non-capillary porosity was more effective than that of total porosity on Chinese Fir and Masson Pine's growth, and for the purpose of fine growth of the trees, their proportion must be appropriate.