广西马尾松立木干形差异性分析  

The differential analysis of Pinus massoniana stand stem form in Guangxi

作　　者：韦立权 徐庆玲 曾春阳 刘峰 岑巨延 WEI Liquan;XU Qingling;ZENG Chunyang;LIU Feng;CEN Juyan(Guangxi Forest Inventory and Planning Institute,Nanning 530011,Guangxi,China;Guangxi Gaofeng Forest Farm,Nanning 530028,Guangxi,China)

机构地区：[1]广西壮族自治区林业勘测设计院,广西南宁530011 [2]广西壮族自治区国有高峰林场,广西南宁530028

出　　处：《中南林业科技大学学报》2025年第4期14-23,共10页Journal of Central South University of Forestry & Technology

基　　金：广西林业科研项目(桂林科研[2016]31号、桂林科研[2015]15号、桂林科研[2016]24号)。

摘　　要：【目的】立木干形是立木材积测定的重要影响因素,通过干形相关指标差异分析,准确表达立木干形变化,对测算树种材积及指导测树数表修编、促进林木蓄积资源精准管理具有重要意义。【方法】基于广西马尾松人工林采伐样木485株和各产区广泛布设的标准地及其解析木,采用变异系数法、单因素方差分析法及实际验证法对包括胸高形数、实验形数及正形数等主要干形指标的径级及树高级变化进行研究。【结果】1)实验形数在形数系列指标中变异系数最小为7.65%,平均值为0.408 0,和现行使用的马尾松实验形数值(0.396)呈较大偏差;胸高形数及1/4、1/10、2/10、3/10树高处正形数的变异系数较小,分别为7.86%、8.36%、11.18%、12.23%、12.19%;2)样木的实验形数及胸高形数在广西不同产区间差异不显著;3)主要干形指标应用及修编前后二元材积表计算的材积与另置检验样本320株样木实际材积相比较,平均实验形数法验证的材积相对误差小于2%。【结论】广西不同产区间马尾松立木实验形数及胸高形数差异不显著,实验形数变异系数最小,样木平均实验形数指标值使用精度优良。【Objective】The stem form of stand trees is an important influencing factor in the determination of standing timber,by analyzing the differences of the stem form related indicators and accurately expressing the changes of stem form,is of significance for calculating tree species volume,guiding the compilation of tree quantity tables,and promoting precise management of forest storage resources.【Method】Based on 485 fallen sample trees of Pinus massoniana plantations in Guangxi and widely distributed sample plots and their analytical trees in various production areas,the changes of major stem form indicators including breast height form factor,experimental form factor and normal form factor were studied and compared in diameter and height class,Using coefficient of variation,one-way analysis of variance,and practical validation methods.【Result】The results showed that:1)the coefficient of variation of the experimental form factor in the form factor series index was the smallest at 7.65%,with a survey average of 0.4080,which was significantly different from the currently value used experimental form factor of P.massoniana(0.396);The coefficients of variation in tree breast height and series of the normal height at 1/4,1/10,2/10,3/10 were relatively small,with values of 7.86%,8.36%,11.18%,12.23%,12.19%respectively;2)There was no difference in the experimental form factor and the breast-height form factor of the sample wood among different production areas in Guangxi;3)The actual volume of the other 320 fallen trunks as separate test sample were compared with the different method including the average value of experimental form factor application,the volume of the before and after standard volume table,the relative error of the volume in experimental form factor method was less than 2%.【Conclusion】There is no significant difference in the experimental form factor and breast height form factor of P.massoniana between different production areas in Guangxi.The coefficient of variation in experimental form fa

关 键 词：马尾松 实验形数 胸高形数 正形数 立木材积表 

分 类 号：S757.2[农业科学—森林经理学]