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用灰色系统理论中的关联分析方法，定量分析了临江地区暗棕壤、白浆土立地条件下影响大青杨的树高、树高连年生长量、胸径连年生长量和材积连年生长量的主要环境因子．通过分析计算得出大青杨生长情况与生长环境因子之间的相关关系，得出影响临江地区大青杨生长量的主要因子有ｐＨ值、海拔、比重、年平均相对湿度、年降水量、水解酸、阳离子代换量、容重、Ａ层厚度等因子；并利用关联分析得出影响大青杨生长的主要环境因子，建立了ＧＭ（０，Ｎ）预测模型
Using the method of correlation analysis in gray system theory, this paper quantitatively analyzed the effects of the dark brown soil and Albic soil on the site conditions in the Linjiang area, such as tree height, annual growth of tree height, annual growth of DBH and annual growth of volume The main environmental factor. Through the analysis and calculation, the relationship between the growth and the growth and environmental factors of Populus tomentosa was analyzed. The main factors influencing the growth of Populus davidiana in the Linjiang area were pH value, altitude, specific gravity, annual average relative humidity, annual precipitation , Hydrolytic acid, cation exchange capacity, bulk density, thickness of layer A and other factors; and using correlation analysis to draw the main environmental factors that affect the growth of Populus euphratica, the GM (0, N) prediction model