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首页> 外文期刊>Journal of Forest Planning >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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Allometric Biomass Equations, Biomass Expansion Factors and Root-to-shoot Ratios of Planted Acacia mangium Willd. Forests in West Java, Indonesia

机译：种植的金合欢（Acacia mangium Willd）的异速生物量方程，生物量扩展因子和根茎比。印度尼西亚西爪哇省的森林

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摘要

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 the10-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 > 10 cm) 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.
机译：我们提出了3到10岁的马占相思树（Acacia mangium Willd）种植林中生物量估算的两个对数线性方程模型。使用印度尼西亚西爪哇省59棵树的破坏性抽样数据得出的树木。对数线性方程式包括各个叶片，树枝，茎，地上，地下（根）和总生物量的参数。林分水平生物量的年均增加量估计为7.77至10.09t ha〜（-1）y〜（-1）（模型A）和7.91至10.27t ha〜（-1）y〜（-1）（ B型），在5年展位中价值最大。按照IPCC国家温室气体清单计划提出的方法，我们计算了研究林木的基本木材密度（D），生物量膨胀因子（BEF）和根茎比（R）。 D值随着林分年龄从3岁增加到8岁而显着增加，但在8至10岁林分之间没有显着差异。 BEF值在3至8岁的看台之间没有差异（平均1.332），而在10岁的看台上下降到1.180。 R值随着林分龄的增加而显着增加，从0.157增加到0.190。在这项研究中，man曲的BEF值小于IPCC提供的热带阔叶林类型的默认值（dbh> 10 cm）（平均值为3.4;范围为2.0-9.0）。由于许多因素可能会影响对数线性方程和D，BEF和R的参数值以进行生物量估计，因此本研究中提供的方程和值仅适用于在可比气候，林分年龄，森林经营条件下生长的A林。条件。

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