文献类型：期刊文献

英文题名：A Comparative Evaluation of Three Stem Profile Equations for Three Precious Tree Species in Southern China

作者：Jiang, Jun[1] Li, Jie[2] Pang, Lifeng[3] Ming, Angang[4,5]

第一作者：Jiang, Jun

通信作者：Jiang, J[1];Pang, LF[2]

机构：[1]Beijing Forestry Univ, Res Ctr Forest Management Engn, State Forestry & Grassland Adm, Beijing 100083, Peoples R China;[2]Shangqiu Univ, Coll Landscape Architecture, Shangqiu 476113, Peoples R China;[3]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Key Lab Forest Management & Growth Modelling, NFGA, Beijing 100091, Peoples R China;[4]Guangxi Youyiguan Forest Ecosyst Res Stn, Pingxiang 532600, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China

年份：2020

卷号：11

期号：6

起止页码：1-11

外文期刊名：FORESTS

收录：;EI(收录号：20202908951906);Scopus(收录号：2-s2.0-85087984528);WOS:【SCI-EXPANDED(收录号:WOS:000552484300001)】；

基金：This work was funded by the National Natural Science Foundation of China (Grant No. 31901306).

语种：英文

外文关键词：precious tree species; stem curve; simple taper equation; segmented taper equation; variable exponent equation

摘要：Accurately describing the stem curve of precious tree species and estimating the quantity of various types of wood and their volume in the tropics can provide technical support for reasonable bucking. This study utilizedErythrophleum fordii,Castanopsis hystrixandTectona grandisas study objects. Forty replicates of each species were used for a total of 120 individual trees. Their tape equations were constructed using simple tape equations, segmented taper equations and variable form taper equations. Statistical indicators were utilized to determine the best taper equation for the three types of precious tree species. A number of methods were compared and analyzed, including the index of correlation, the residual sum of squares, the mean prediction error, the variance of prediction errors and the root mean square error. Finally, a preliminary quantitative analysis was conducted to determine the trends of these three types of tree species. The result shows that the precision of the three predictions developed for each species is high, and, in particular, the segmented taper equations with optimized algorithms is the best. The tendency of the three species to vary was shown to be the highest forT. grandisin the range of 0.0 to 0.8 for its relative height, followed byE. fordii, while the variation ofC. hystrixwas the smallest. However, in the range of 0.8 to 1.0 relative height, the variation ofCastanopsis hystrixwas the largest, and the variation of bothE. fordiiandT. grandiswere almost the same. Therefore, the segmented taper equations with optimization algorithms was recommended to fit the three types of tree species in the tropics. These types of equations can be used to estimate the stumpage and timber quantity and as a guide reasonable bucking for these three species.