| 二元立木材积方程的检验与更新方法探讨 |
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| 引用本文： | 曾伟生.二元立木材积方程的检验与更新方法探讨[J].中南林业调查规划,2010,29(3):1-5. |
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| 作者姓名： | 曾伟生 |
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| 作者单位： | 中国林业科学研究院森林资源信息研究所,北京,100091 |
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| 摘 要： | 森林蓄积是森林资源监测的重要指标,用于森林蓄积估计的立木材积表作为行业标准已经颁布使用了30多年,需要进行检验、修订或更新。以东北落叶松(Larix)和南方马尾松(PinusMassoniana)立木材积数据为例,探讨二元立木材积方程的检验和更新方法。结果表明:采用回归方程的适应性检验方法,可以对原来的二元立木材积方程的适应性进行检验;两个树种原来的材积方程存在明显的系统偏差,总相对偏差和平均系统偏差均达到了10%左右,已经不再适用于现阶段的森林蓄积量估计;新建立的两个树种的二元立木材积方程,其平均预估误差都在3%以内,达到了预定的精度要求。
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| 关 键 词： | 主木材积 二元材积方程 检验 更新 平均预估误差 落叶松 马尾松 |
Discussion on Verification and Updating of Two-way Tree Volume Equations |
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| ZENG Weisheng.Discussion on Verification and Updating of Two-way Tree Volume Equations[J].Central South Forest Inventory and Planning,2010,29(3):1-5. |
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| Authors: | ZENG Weisheng |
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| Institution: | ZENG Weisheng(Institute of Forest Resources Information,Chinese Academy of Forestry,Beijing 100091,China) |
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| Abstract: | Forest volume is the important item in forest resource monitoring.The tree volume tables or equations,which have been used as ministerial standard to estimate forest volume for more than 30 years,are in urgent need of verification,revision,or updating.Based on the tree volume data of larch(Larix) of the north-east and Masson pine(Pinus Massoniana) of the south in China,the method of verification and updating to two-way tree volume equations was discussed in this paper.The results showed:(i) the adaptation t... |
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| Keywords: | tree volume two-way volume equation verification updating mean prediction error larch Masson pine |
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