摘要
为给广西林木资源精细化测量和管理提供科学的计量依据,以杉木(Cunninghamia lanceolata)人工林为研究对象,依据广西木材市场木材计量的实际需求,将规格材按照2.2和4.0 m两种材长规格,采用带皮、去皮削度方程、树高曲线方程和树皮率方程计算出材率,编制杉木二元经济材出材率表。结果表明,杉木二元经济材出材率表检验结果良好,不同分区、胸径和树高分段及两套独立样本检验结果为总相对误差和平均系统误差均小于5%,平均百分标准误差均小于10%,预估精度均达96%以上。杉木二元经济材出材率表通用性和适用性方面均表现较好,可广泛应用于广西杉木适生区的生产和经营。
In order to provide scientific measurement basis for precise measurement and management of forest resources in Guangxi,taking Cunninghamia lanceolata plantations as research objects,according to actual de⁃mand of timber measurement in Guangxi timber market,taper equations with and without bark,tree height curve equation and bark rate equation were used to calculate outturn percentage using specification timbers with 2.2 and 4.0 m length.Outturn percentage tables of binary economic timbers of C.lanceolata were com⁃plied.Results showed that outturn percentage tables of binary economic timbers of C.lanceolata had good test results.Test results of different regions,DBHs,tree heights and two independent samples were that total rela⁃tive errors and average systematic errors were less than 5%,and mean percentage standard errors were less than 10%,and estimated accuracies were more than 96%.Outturn percentage tables of binary economic timbers of C.lanceolata had better universality and applicability and could be widely applied in production and manage⁃ment of C.lanceolata in suitable areas of Guangxi.
作者
徐庆玲
曾春阳
冯建强
张伟
岑巨延
Xu Qingling;Zeng Chunyang;Feng Jianqiang;Zhang Wei;Cen Juyan(Guangxi Forest Inventory&Planning Institute,Nanning,Guangxi 530011,China;Guangxi State-owned Gaofeng Forest Farm,Nanning,Guangxi 530001,China)
出处
《广西林业科学》
2023年第2期234-240,共7页
Guangxi Forestry Science
基金
广西林业科研项目(桂林科研[2015]28号,桂林科研[2016]24号)。
关键词
削度方程
树高曲线方程
树皮率方程
出材率表
杉木
taper equation
tree height curve equation
bark rate equation
outturn percentage table
Cunning⁃hamia lanceolata
