| 摘要: |
| 【目的】预测和研究蒙古栎天然林的生长与发展规律，以更好地经营蒙古栎天然林。【方法】以蒙古栎天然林为研究对象，基于吉林省汪清林业局195块蒙古栎林固定样地的2期复测数据，通过分析已有的16个普通树高曲线模型和16个标准树高曲线模型并对比2种模型的拟合结果，建立蒙古栎林的单木树高曲线模型。【结果】最终确定的蒙古栎林最优普通树高曲线模型的决定系数R2为0.728，调整决定系数Radj2为0.721，均方根误差为 2.291 m，相对均方根误差为0.158，平均误差为0.118 m，平均绝对误差为1.794 m。最优标准树高曲线模型的决定系数R2为0.907，调整决定系数Radj2为0.901，均方根误差为1.479 m，相对均方根误差为0.114，平均误差为0.094 m，平均绝对误差为1.381 m。【结论】增加了树木和林分因子的标准树高曲线模型，其精度较普通树高曲线模型有大幅提高。最优的蒙古栎单木标准树高曲线模型自变量包括胸径、林分每公顷株数、林分每公顷断面积、优势木平均高。建立的单木标准树高曲线模型有较好的生物学意义，可为吉林省汪清地区蒙古栎天然林的生长预测提供依据。 |
| 关键词: 蒙古栎天然林 普通树高曲线模型 标准树高曲线模型 |
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| 基金项目:“十二五”科技支撑计划课题“长白山过伐林可持续经营技术研究与示范”（2012BAD22B02） |
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| Growth model for individual-tree in natural Quercus mongolica forests:Ⅱ.Height-diameter model |
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MA Wu,LEI Xiang-dong,XU Guang,et al
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| Abstract: |
| 【Objective】The individual-tree model for growth and development of natural Quercus mongolica forest was established for better management of such forests.【Method】The data used to develop individual-tree height-diameter model for natural Quercus mongolica forest were collected from 195 permanent sampling plots in Wangqing Forest Bureau,Jilin province at two periods.Based on analyzing the existing 16 local height-diameter models and 16 general height-diameter models,individual tree height-diameter model for Quercus mongolica forest was developed and the results were compared with local and general height-diameter models.【Result】The values of fitting and testing statistics R2,Radj2,RMSE,ERMSE,ME and MAE of the optimal local height-diameter model were 0.728,0.721,2.291 m,0.158,0.118 m and 1.794 m,respectively.Those values for the optimal general height-diameter model were 0.907,0.901,1.479 m,0.114,0.094 m and 1.381 m,respectively.【Conclusion】The optimal general height diameter model had higher precision than local one and the independed varibles included diameter,the number of trees per hectare,stand basal area per hectare,and average height of dominant trees.The height-diameter model established in this paper is biologically reliable for predicting the growth of Quercus mongolica forest in Wangqing region of Jilin province. |
| Key words: Quercus mongolica forest local height-diameter model general height-diameter model |
