摘要
以140株尾叶桉、383株巨尾桉样木数据作为分径阶建模数据,拟合得到带皮削度方程,利用带皮削度方程求算样木全树干材积以及尾梢纤维材材积,编制尾叶桉、巨尾桉尾梢纤维材出材率表,并研发了桉树尾梢纤维材材积计算器,以期为准确测算桉树尾梢纤维材的出材量提供理论依据和计量数表。经检验,两个树种尾梢纤维材出材率表总相对误差和平均系统误差均小于5.0%,平均百分标准误差小于9.0%,预估精度达96.0%以上,各项精度指标达到了编制林业数表模型精度要求,可适用于广西桉树伐区调查、森林资产评估等生产实践。
Based on diameter class data from 140 samples of Eucalyptus urophylla and 383 samples of E.grandis×E.urophylla,a bark-included taper equation was formulated.This equation was then utilized to estimate the total stem volumes of these samples,as well as the volume of top-logs from each tree–logs that are usually sold as pulpwood due their small diameters.A yield table of top-log pulpwood of the two species was then compiled.Meanwhile,a volume calculator for the grade of logs was also developed.The result showed that the total relative error and average systematic error of the yield table for the pulpwood top-logs of these two species were less than 5.0%,while the average percent standard error was less than 9.0%and estimation accuracy was over 96.0%.All accuracy indicators meet the accuracy requirements for developing forestry data table models.The results of this study can be broadly applied to the inspection of Eucalyptus spp.logging areas and forest asset evaluations in Guangxi,thereby providing a theoretical basis and a measurement table for the accurate estimation of the yield of Eucalyptus spp.top-logs for pulpwood.
作者
陆艳武
范小虎
罗创福
岑巨延
洪燕
张挺
LU Yanwu;FAN Xiaohu;LUO Chuangfu;CEN Juyan;HONG Yan;ZHANG Ting(Guangxi ZhuangAutonomous Region State-owned Gaofeng Forest Farm,Nanning 530002,Guangxi,China;Guangxi ZhuangAutonomous Region State-owned Qipo Forest Farm,Nanning 530034,Guangxi,China;Guangxi Correct Intelligent Technology Ltd,Nanning 530002,Guangxi,China)
出处
《桉树科技》
2024年第2期71-76,共6页
Eucalypt Science & Technology
基金
广西林业科研项目(桂林科研[2016]24号)。
关键词
尾梢纤维材
削度方程
出材率表
top-logs pulpwood
taper equation
wood yield table
