Allometric Biomass Equations, Biomass Expansion Factors and Root-to-shoot Ratios of Planted Acacia mangium Willd. Forests in West Java, Indonesia

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概要

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• We present two models of log-linear equations for biomass estimation in planted stands of 3- to 10-year-old Acacia mangium Willd. trees, using destructive sampling data of 59 trees in West Java, Indonesia. The log-linear equations include parameters for individual leaf, branch, stem, aboveground, belowground (root), and total biomass. Average annual increments of stand-level biomass were estimated at 7.77 to 10.09t ha^<-1> y^<-1> (model A) and at 7.91 to 10.27t ha^<-1> y^<-1> (model B), with the largest values in the 5-year-old stand. Following the methodology presented by IPCC National Greenhouse Gas Inventories Programme, we calculated basic wood density (D), biomass expansion factors (BEF), and root-to-shoot ratios (R) of the study stands. The value of D increased significantly as stand age increased from 3 to 8 years, but did not significantly differ between 8- and 10-year-old stands. The value of BEF did not differ among the 3- to 8-year-old stands (average 1.332) and decreased to 1.180 in the 10-year-old stand. The values of R increased significantly with stand age, from 0.157 to 0.190. The BEF values of A. mangium in this study were smaller than the default values for the tropical broad-leaf forest type (dbh>10cm) given by IPCC (mean, 3.4; range, 2.0-9.0). Because many factors may affect the parameter values of log-linear equations and D, BEF, and R for biomass estimation, the equations and values provided in this study are only applicable to A. mangium forests growing under comparable climatic, stand age, forest management conditions.

• 森林計画学会の論文

著者

• Heriansyah Ika

  Forest And Nature Conservation Research And Development Center

• Kiyono Yoshiyuki

  Department Of Forest Vegetation Forestry And Forest Products Research Institute

• Miyakuni Kiyoshi

  Registered expert for Japan International Forestry Promotion and Cooperation Center (JIFPRO)

• Heriyanto N.

  Forest and Nature Conservation Research and Development Center

関連論文

• Long-term trends in trunk diameter and tree height growth in planted forests in the humid tropics of West Java, Indonesia
• Biomass of a man-made forest of timber tree species in the humid tropics of West Java, Indonesia
• Allometric Biomass Equations, Biomass Expansion Factors and Root-to-shoot Ratios of Planted Acacia mangium Willd. Forests in West Java, Indonesia
• Practicalities of Non-Destructive Methodologies in Monitoring Anthropogenic Greenhouse Gas Emissions from Tropical Forests under the Influence of Human Intervention
• Tree Biomass Carbon Stock Estimation using Permanent Sampling Plot Data in Different Types of Seasonal Forests in Cambodia

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