日本落叶松生长量与立地因子的相关分析

CORRELATION ANALYSIS BETWEEN THE INCREMENT AND SITE FACTORS OF JAPAN LARCH

应用双重筛选逐步回归方法，建立了胶东半岛日本落叶松人工林胸径、树高生长量与五个立地因子（海拔、坡向、坡度、坡位和土层厚度）之间的多元回归模型。通过对模型分析指出，日本落叶松胸径和树高生长量与立地因子之间存在着密切相关关系，其中海拔是影响日本落叶松胸径和树高生长的主要立地因子，其次是土层厚度、坡向和坡度，坡位对其影响不显著。

The method of double sieving step- by- step regression analysis is applied toestablish mtiltivariate regression model between the increment and site factors of the Japan larchplantation,in Jiaodong peninsula. The result of model analysis shows that there is a significantcorrelation between the increment of breast- height diameter,height and site factors of the Japanlarch.In the site factors,those affecting markedly the increment are elevation,thickness of soil,direction and degree of slope.