摘要
采用相对削度法建立了山杨与红桦5个材积模型,模型的拟合与检验精度均达到了使用精度要求。山杨5个材积模型系统误差均小于±1.26％(山本式小于2.68％)。红桦的3个材积模型系统误差均小于±2.87％(山本式小于±13.5％),使用精度均高于山本式)其中,山杨以V=D_(1·3)~2(ah^(-2)+bh^(-1)+c)~2h立木材积模型最优;红桦以V=D_(1·3)~2(a+bh+ch^2)~2h最优。
Describes five volume models prepared for Populus davidiana and Betula albosinensis by relative taper method.The fitting and testing precisions were all meet applicable requirments.The systematic error of five volume models for p.davidiana and three volume models for Betuia albcsintnsis were<+ 1.26%and< + 2.87% respectively.Applicable precision of proposed volume models were higher than that of Yamamoto kozuzo formulas. Model (4) for Betula, albosinensis were the superior of all models proposed.
出处
《西北林学院学报》
CSCD
1990年第1期52-59,共8页
Journal of Northwest Forestry University
关键词
山杨
红桦
材积模型
相对削度法
relative taper
volume model
Yamamoto Kozuzo formulas
