西宁市油松人工林生长主导因子分析

Analysis on the Leading Factor of Growth of Pinus tabuliformis Carrière Plantation in Xining City

为了明确西宁市油松人工林生长的主要影响因子,以西宁市南北山油松人工林为研究对象,选取坡度、坡向坡位(温度、湿度)、海拔、土壤容重、土壤有机质5个因子作为研究油松人工林生长的影响因子,利用灰色关联度法分析各因子对油松生长的影响,得出对油松人工林影响作用最大的因子。结果表明,对树高影响作用的大小排序为坡向坡位、土壤容重、海拔、土壤有机质、坡度;对胸径影响作用的大小排序为坡向坡位、土壤容重、土壤有机质、海拔、坡度,故影响西宁市油松人工林生长的主导因子为坡向坡位。

In order to define the growth of Pinus tabulaeformis plantation in Xining City,five factors were selected to study the growth of P.tabulaeformis plantation,including slope gradient,slope aspect(temperature,humidity),altitude,soil bulk density and soil organic matter,by using the method of grey correlation degree,the influence of each factor on the growth of P.tabulaeformis was analyzed,and the factor that had the greatest influence on the growth of P.tabulaeformis plantation was obtained.The results showed that the order of influence on tree height was as follows:aspect and position of slope>soil bulk density>altitude>soil organic matter>slope gradient;The order of influence on DBH was as follows:aspect and position of slope>soil bulk density>soil organic matter>altitude>slope gradient,so the dominant factor affecting the growth of P.tabulata plantation in Xining was aspect and position of slope.