摘要
以中国南方主要速生丰产树种桉树为研究对象,利用野外破坏性实测的90棵桉树解析木数据,研究桉树单木器官生物量的分配及规律,构建最佳单木异速生长方程,计算桉树根冠比并将其应用于桉树树根生物量的估算。结果表明:1)桉树生物量的分配策略如下:随着林龄的增大,桉树树干的生物量分配比例不断增多,而树枝、树叶和树根的生物量分配比例不断减少。2)应用桉树分林龄的根冠比数据估算桉树树根生物量是最为可行且有效的方法。3)在桉树生物量的异速生长方程构建中,乘幂方程优于线性方程,最优自变量则根据各器官有所差异。
The estimation of forest biomass at individual tree scale is the basis for the estimation of forest biomass at the regional scale.This paper aims at developing a reliable and effective allometric equation for Eucalyptus in Fujian in order to improve the estimation accuracy of Eucalyptus biomass in this area and to provide basic supporting data for the sustainable forestry development of Eucalyptus.This study takes Eucalyptus,a major fast-growing and productive tree species in Southern China,as the research object.Using 90 Eucalyptus woods harvested in the field,the partitioning of Eucalyptus biomass among organs are studied,the optimal allometric equations are constructed,and the Eucalyptus root/shoot ratios are calculated and applied to estimate Eucalyptus root biomass.Results show Eucalyptus has the following biomass allocation strategies:the biomass proportion of trunks increases with increasing stand age,while that of branches,leaves,and roots decreases.The most feasible and effective way to estimate Eucalyptus root biomass is to use root/shoot ratio data with stand age.In the construction of the allometric equation for Eucalyptus biomass,the multiplicative power equation is better than the linear equation,and the optimal independent variable varied by organ type.This paper provides data and theoretical support for the accurate estimation of Eucalyptus plantation biomass,and has implications for species growth patterns,survival strategies,and even forest ecological management.
作者
郑小曼
翁闲
欧玲珑
任引
ZHENG Xiaoman;WENG Xian;OU Linglong;REN Yin(Key Laboratory of Urban Environment and Health,Fujian Key Laboratory of Watershed Ecology,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,Fujian,China;University of Chinese Academy of Sciences,Beijing 100049,China;Fujian Jianyang Fanqiao State Owned Forest Farm,Nanping 354200,Fujian,China;College of Life Sciences,Fujian Agriculture and Forestry University,Fuzhou 350002,China)
出处
《中国科学院大学学报（中英文）》
CAS
CSCD
北大核心
2024年第3期321-333,共13页
Journal of University of Chinese Academy of Sciences
基金
国家自然科学基金(31670645,31972951)
福建省科学技术厅项目(2021I0041,2021T3058)资助。
关键词
桉树
单木生物量
器官分配
根冠比
异速生长方程
Eucalyptus
individual tree biomass
organ partitioning
root/shoot ratio
allometric equations
作者简介
通信作者:任引,E-mail:yren@iue.ac.cn。
