| 摘要: |
| 黄山松 Pinus taiwanensis 是中国特有造林树种之一, 建立适宜的黄山松针阔混交林的树高—胸
径模型, 可为该林分的林木生长预测、 森林经营管理、 森林资源清查提供理论参考。 文章以四明山黄山松针阔混交林为研究对象, 选用 30 个常用的树高—胸径经验模型作为备选模型, 利用 Ra
2、 AIC 和 BIC 筛选确定 5 个基础模型。 基础模型中, 引入枝下高 (HZ) 和冠幅 (CW) 建立 15 个修正模型, 利用 Ra2、RMSE、 MAE、 RMAE 和 AIC 等 5 个模型评价指标确定适宜的树高—胸径模型。 结果表明, 相同基础模型下的 3 个修正模型拟合效果, 以同时引入 HZ 和 CW 的模型最好; 同时引入 HZ 和 CW 的不同基础模型拟合效果, 以 M21 模型最好; M21. HZCW 是拟合效果最好的修正模型, 为适宜的四明山黄山松针阔混交林的树高—胸径模型, Ra2 从 0. 684 1 (基础模型) 提高至 0. 750 9 (修正模型)。 |
| 关键词: 四明山 黄山松 针阔混交林 树高-胸径模型 |
| DOI： |
| 分类号: |
| 基金项目:宁波市科学技术局公益性计划项目(2021S019) |
|
| Height-Diameter Models for Pinus taiwanensis Coniferous-Broad Leaved Mixed Forest in Siming Mountain |
|
LOU Minghua1, YANG Tonghui1, WANG Weibing2, MAO Jianfang2, XU Jing2, ZHANG Jianhong1
|
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1.Ningbo Academy of Agricultural Sciences,Ningbo;2.Ningbo Forest Farm,Ningbo
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| Abstract: |
| Pinus taiwanensis is one of the endemic afforestation species in China, and the establishment of
a suitable tree height-diameter model for the mixed coniferous-broad leaved forest of P. taiwanensis can provide a
theoretical basis for the prediction of forest growth, forest management, and forest inventory in this forest
stand. In this paper, 30 commonly used tree height-diameter empirical models were selected as alternative models
and 5 basic models were determined by Ra
2
, AIC, and BIC screening, taking the mixed coniferous-broad
leaved forest of P. taiwanensis in Siming mountain as the research object. Under crown height (HZ) and crown
diameter (CW) were introduced to construct 15 improved models based on 5 basic models. An appropriate improved model was selected using 5 model evaluation indices, namely, Ra
2
, RMSE, MAE, RMAE, and
AIC. The results show that there is the best performance for an improved model within HZ and CW among three improved models based on the same basic model; M21 is the best model within HZ and CW among different basic models. M21. HZCW is the best fitting improved model, as an appropriate height-diametermodel for Pinus
taiwanensis coniferous-broad leaved mixed forest, Ra
2
increased from 0. 684 1 (basic model) to 0. 750 9 (improved model). |
| Key words: Siming mountain Pinus taiwanensis coniferous-broad leaved mixed forest height-diameter model |
