| 徐婷婷,施凯泽,冷鸿天,郎晓雪,罗 胤.金沙江流域天然云南松一元材积表的编制[J].林业调查规划,2025,50(4):1-5 |
| 金沙江流域天然云南松一元材积表的编制 |
| Establishment of the One-Variable Volume Table for NaturalPinus yunnanensis in the Jinsha River Basin |
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| DOI： |
| 中文关键词: 天然云南松 一元材积表 胸径—材积模型 适用性检验 金沙江流域 |
| 英文关键词: natural Pinus yunnanensis one-variable volume table DBH-volume model applicability
test Jinsha River Basin |
| 基金项目: |
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| 摘要点击次数: 873 |
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| 中文摘要: |
| 利用金沙江流域的185 株天然云南松数据,采用直接建模和加权建模两种方法建立新的一元
立木材积表,并对新建和现行一元材积表的估计误差进行检验和评价。结果表明,现行模型的总相
对误差为-8.688 5,F检验差异显著,现行的一元材积表已不符合《一元立木材积表编制技术规
程》。从所选的10 个基础模型构建结果来看,直接建模的评价指标优于加权模型,根据5项评价指
标,最终选出最优模型为:V=0.00000645932×D(3.618737+(-0.00703737×D)),新模型通过了适用性检验。以
新建的一元材积模型估计值为基础,通过按径阶计算的旧材积模型的总体相对误差(TRE) 来看,
90%以上径阶偏差在10%以上,表明现行模型已不再适用,需构建新的材积模型。 |
| 英文摘要: |
| Using data from 185 natural Pinus yunnanensis trees in the Jinsha River Basin, a new one-variable
standing tree volume table was established using two methods: direct modeling and weighted modeling. The
estimation errors of the newly constructed and existing one-variable volume tables were tested and evaluated.
The results showed that the total relative error of the existing model was -8.688 5, with a significant
difference in the F-test, indicating that the current one-variable volume table no longer complies with the
Technical Regulations for the Establishment of One-variable Standing Tree Volume Tables. Among the 10 selected
basic models, the evaluation metrics of direct modeling outperformed those of weighted modeling.
Based on five evaluation criteria, the optimal model was ultimately selected: V=0.00000645932×D(3.618737+(-0.00703737×D)). The new model passed the applicability test. Using the estimated values from the
new one-variable volume model as a basis, the total relative error(TRE) of the old volume model calculated
by diameter class showed that over 90% of diameter classes had deviations exceeding 10%, indicating that the current model is no longer suitable and a new volume model needs to be constructed. |
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