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桉树生物量估算模型及与IPCC法的对比分析
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  • 英文篇名:Allometry Equations for Estimating Eucalyptus Tree Biomass and Comparison with IPCC Method
  • 作者:揭凡 ; 杜阿朋 ; 竹万宽
  • 英文作者:JIE Fan;DU Apeng;ZHU Wankuan;China Forestry Group Leizhou Forestry Bereau Co,Ltd.Shiling Forest Farm Branch;China Eucalypt Research Centre;
  • 关键词:桉树人工林 ; 生物量 ; 异速生长方程 ; 区域尺度
  • 英文关键词:Eucalyptus plantation;;biomass;;allometry equations;;regional scale
  • 中文刊名:桉树科技
  • 英文刊名:Eucalypt Science & Technology
  • 机构:中林集团雷州林业局有限公司石岭林场分公司;国家林业和草原局桉树研究开发中心;
  • 出版日期:2019-03-15
  • 出版单位:桉树科技
  • 年:2019
  • 期:01
  • 基金:广东省林业科技创新项目(2018KJCX014);; 2016年省级生态公益林激励性补助资金项目(2016-03);; 广西科技重大专项(桂科AA172004087-9);; 广东湛江桉树林生态系统国家定位观测研究站运行补助
  • 语种:中文;
  • 页:4-11
  • 页数:8
  • CN:44-1246/S
  • ISSN:1674-3172
  • 分类号:S718.5
摘要
为构建适用于区域桉树人工林生物量异速生长方程,收集整理桉树林的生物量文献数据,拟合测树因子(胸径和树高)与地上、地下和单株生物量间的回归关系。结果表明:单自变量模型中,基于胸径因子的方程拟合优度高于树高因子。双自变量模型中,树高因子的添加仅对单株生物量拟合优度提高了0.7%~1.5%。模型的预测值与实测值的比较及相容性分析表明,方程lnW=-2.833+2.301ln D+0.352 1lnH对地上生物量预测效果最优,精度达94.6%;方程lnW=-5.175+0.939ln D~2H对地下生物量预测效果最优,精度达66.8%;方程lnW=-2.960+0.896ln DH~2对单株生物量预估效果最优,精度达95.5%。分量模型与单株模型相容性较好。桉树人工林BCEF和R的平均值分别为0.634 1(n=65,SD=0.132)和0.205 6(n=76,SD=0.089)。IPCC法对林分生物量估算精度高于异速生长方程,达到95.3%。因此,建议采用IPCC生物量估算参数法进行区域尺度桉树人工林生物量估算。
        In order to construct allometric equations for large scale Eucalyptus plantations,biomass data were obtained from published papers and subject to meta-analysis to obtain regression relationships of various factors with aboveground,belowground and total-tree biomass.The results showed that a single independent variable equation based on DBH performed better than one based on tree height.In double independent variable models,the use of tree height in combination with DBH only improved the R~2 of total-tree biomass by 0.7% to 1.5%,but did not improve correlations obtained with other component equations.Verification analysis of predicted and measured values of the models showed that the equation ln W=-2.833+(2.301~*ln D)+0.3521~*ln H has the best predictive ability for aboveground biomass with an accuracy of 94.6%,while ln W=-5.175+0.939~*ln D~2H has the best predictive ability for underground biomass with a correlation of 66.8%,and ln W=-2.960+0.896~*ln DH~2 has the best predictive ability for total-tree biomass with a correlation of 95.5%.The derived component model was comparable with total-tree biomass model.The means of BCEF(Biomass Conversion and Expansion Factor)and R(Root:shoot Ratio)were 0.634(n=65,SD=0.132)and 0.206(n=76,SD=0.089),respectively.The accuracy of the forest biomass estimation by the IPCC method was higher than that of the allometric equation,which was 95.3% Therefore,it is recommended to use the IPCC(Intergovernmental Panel on Climate Change)method for estimating the biomass of Eucalyptus plantations on regional scales.
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