摘要
以广西国有东门林场大花序桉人工林为试验对象,对林地内35年生大花序桉的胸径、树高、材积和干形等指标进行分析。结果表明,35年生大花序桉人工林胸径分布主要集中在34~38 cm,胸径32 cm以上占比达74.42%;树高分布主要集中在30~38 m,树高30 m以上占比达84.88%;胸径、树高及材积生长量分别为36.2 cm、33.8 m、1.05876 m^(3);材积平均生长曲线和连年生长曲线在32年时相交,初步判定大花序桉材积数量成熟年龄为32 a;胸高形数在0.45左右,具有较好的完满度。胸径、材积与树龄的最优模型为苏马克模型,树高与树龄的最优模型为二次函数模型,各拟合模型相关系数均达到0.99以上,拟合效果理想。大花序桉人工林生长快速,林木完满度较好,胸径、树高较大的植株分布较多,是培育大径材的优良树种。
The indexes such as DBH,tree height,volume and stem shape of 35-year-old Eucalyptus cloeziana in Dongmen State-owned Forest Farm of Guangxi were analyzed.The results showed that the DBH of 35-year-old Eucalyptus cloeziana plantation was mainly 34~38 cm,and the DBH above 32 cm accounted for 74.42%;the tree height was mainly concentrated at 30~38 m,and the tree height above 30 m accounted for 84.88%;DBH,tree height and volume growth were 36.2 cm,33.8 m and 1.05876 m^(3) respectively;the average growth curve of volume intersected with the continuous growth curve at 32 years,so it was preliminarily determined that the mature age of wood volume of Eucalyptus cloeziana was 32 years;the form factor was about 0.45,which had good completeness.The optimal model of DBH,volume and tree age was Schumacher model,and the optimal model of tree height and tree age was quadratic function model.The correlation coefficients of each model were 0.99 above with ideal fitting effect.Eucalyptus cloeziana which grew rapidly,had good forest completeness and many plants with large DBH and tree height was an excellent tree species for cultivating large-diameter wood.
作者
邱炳发
钟连香
熊涛
秦武明
覃汉夫
QIU Bingfa;ZHONG Lianxiang;XIONG Tao;QIN Wuming;QIN Hanfu(Dongmen State-owned Forest Farm of Guangxi,Fusui,Guangxi 532108,China;Forestry College,Guangxi University,Nanning 530004,China)
出处
《林业调查规划》
2021年第5期20-24,共5页
Forest Inventory and Planning
基金
国家重点研发计划课题“桉树大径材定向培育技术”(2016YFD0600502).
关键词
大花序桉人工林
生长规律
胸高形数
生长模型
大径材
广西
Eucalyptus cloeziana plantation
growth law
form factor
growth model
large-diameter wood
Guangxi
