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旨在研究张家口坝上地区不同无性繁殖造林小黑杨胸径-树高状况。以张家口坝上张北、沽源的无性繁殖造林小黑杨为研究对象,采用树干解析的方法获取插条、断根和埋桩造林小黑杨的胸径-树高实测数据,利用SPSS 18.0拟合3种无性繁殖造林小黑杨的胸径-树高模型。建立了插条造林小黑杨树高的Logistic方程模型,H=1/(0.1+0.559×0.724D),R2=0.992;断根造林小黑杨树高的Logistic方程模型幂函数模型,H=1/(0.1+0.617×0.766D),R2=0.988;埋桩造林小黑杨树高的幂函数模型,H=2.458×D0.524,R2=0.964。结果表明3种非线性回归模型的判定系数R2都大于0.96,D1.3能够很好地解释各器官树高。
The purpose of this study was to study the DBH-tree height of different clonal propagation of Poplar in Zhangjiakou area. Taking the small black poplar of Zhangbeikou and Guyuan in Zhangjiakouba as the research object, the DBH-tree height measured data of cuttings, broken roots and buried-pile of Populus simonii were obtained by tree trunk analysis and fitted with SPSS 18.0 DBH - tree height model of three kinds of clonal propagation Populus. The logistic equation model of height of Populus simonii was established, H = 1 / (0.1 + 0.559 × 0.724D), R2 = 0.992; 0.617 × 0.766D), and R2 = 0.988. The power function model of high-poplar trees with buried pile was H = 2.458 × D0.524 and R2 = 0.964. The results showed that the discriminant coefficients R2 of all three kinds of nonlinear regression models were all greater than 0.96. D1.3 could well explain the height of each organ.