不同林龄、树种落叶松人工林径向生长与气候变化的关系

温晓示,陈彬杭,张树斌,徐凯,叶新宇,倪伟杰,王襄平

Relationships of radial growth with climate change in larch plantations of different stand ages and species

Xiao-Shi WEN,Bin-Hang CHEN,Shu-Bin ZHANG,Kai XU,Xin-Yu YE,Wei-Jie NI,Xiang-Ping WANG

表5 年轮宽度指数与气温、帕尔默干旱指数的PCA1、2轴得分与环境因子、林分结构特征多元回归分析

Table 5 Multiple regression analysis of the scores for the PCA axes 1 and 2 of ring width index and air temperature, palmer drought severity index with environmental factors and stand structural characteristics

PCA1 PCA2 df % SS p df % SS p 潜在蒸发量 Potential evapotranspiration 1 72.170 0.000 2*** 1 0.003 0.973 年降水量 Mean annual precipitation 1 0.884 0.496 1 21.646 0.017* 立地条件 Site quality 2 1.122 0.733 2 13.291 0.123 树种 Tree species 1 0.591 0.576 1 10.129 0.075 林分密度 Stem density 1 0.212 0.736 1 1.219 0.498 林龄 Stand age 1 7.990 0.064 1 27.443 0.009** 蓄积量 Wood volume 1 3.150 0.215 1 6.945 0.128 残差 Residuals 8 13.881 8 19.323