应用杉木削度方程进行理论造材

Theoretical log bucking by using taper equation of Chinese fir

采用削度方程对福建顺昌130株杉木样木进行7种造材方式的理论造材,同时将理论造材的结果与实际造材进行比较,分析理论造材的精度.研究结果表明,理论造材具有较高的精度,出材量系统误差仅为3.08%-3.96%,销售价系统误差仅为4.28%-5.12%,完全可以代替实际造材进行造材方式的选优、出材量和销售价的预测.采用第7种造材方式(遇到根部有缺陷的,则截1 m段头,4 m段造材,根部无缺陷的,则不截头,4 m段造材)实际与理论销售价均最大,为最佳的造材方式.

Seven schemes of theoretical log bucking of 130 sampling trees of Chinese fir plantation from Shunchang, Fujian, China, was carried out by using taper equation, and was compared with real bucking to analyze the accuracy. The results showed that the precision of theoretical bucking was high, and the systematic errors of bucking volume and sales value ranged from 3. 08% to 3.96% and 4. 28% to 5.12%, respectively. Theoretical bucking could replace real bucking for optimizing bucking scheme, predicting bucking volume and sales value. The seventh bucking scheme （ 1-meter-long log bucking from the butt of the stem followed by 4-meter-long log bucking when butt defect was found, and all 4-meter-long log bucking when butt defect was not found）, with the highest sales values of both real and theoretical, was the best bucking scheme.