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对南方型杨树的主栽无性系I-63杨、I-69杨、I-72杨的直径生长过程进行了差异性检验,结果3个无性系的平均相对误差分别为0.34%、-3.89%和4.23%,直径生长过程表现出良好的相似性。采用不分无性系的混合建模方法建立了南方型杨树人工林断面积直径预估模型-Dg=0.968 1H01.361 4N-0.032H00.540 2,从而得到林分断面积预估模型G=0.000 073 607N02.722 8N1-0.064H00.540 2。
The differences of the diameter growth of I-63 poplar, I-69 poplar and I-72 poplar were analyzed. The results showed that the average relative errors of the three clones were 0.34% and 3.89 % And 4.23%, diameter growth process showed good similarity. Using the method of mixed modeling without any clones, the prediction model of cross-sectional area of southern poplar plantation was established, Dg = 0.968 1H01.361 4N-0.032H00.540 2. 073 607N02.722 8N1-0.064H00.540 2.