| 摘要: |
| 【目的】研究北京市蒙古栎天然林的林分树高生长规律，为林分的科学、合理经营管理提供参考。【方法】根据北京市蒙古栎一类清查数据，以Richards方程为基础，采用度量误差模型方法建立林分相容性平均树高曲线方程组。【结果】经检验，所建模型在置信水平α=0.05时显著，对林分树高、胸径的预估精度分别为96.39%和97.23%。随着蒙古栎林分林龄的增长，胸径生长速生期滞后于树高生长速生期，大约在15年时，林分树高生长速度最快，大约在23年时，林分胸径生长速度最快；而林分树高随其胸径的生长变化则是在林分胸径为10 cm左右时生长最快，此后逐渐减缓。【结论】所建立的林分树高曲线联立方程组比较合理，既使得林分树高曲线与林分胸径、树高生长过程曲线之间具有相容性和一致性，也考虑了模型中自变量的度量误差。 |
| 关键词: 蒙古栎 度量误差模型 树高曲线 |
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| 基金项目:北京市教育委员会科学研究与科研基地建设项目（省部共建重点实验室）；林业公益性行业科研专项（201004008） |
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| Measurement error model based compatible system of equations for height DBH curve |
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GAO Dong-qi,DENG Hua-feng,CHENG Zhi-chu
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| Abstract: |
| 【Objective】The growth rule of average tree height for Quercus mongolica natural forest was studied in Beijing to provide reference for scientific manage of stands.【Method】According to continuous forest inventory data of Quercus mongolica and Richards equation,the compatible system of equations for average height-DBH curve of the stands was established based on measurement error model.【Result】The constructed models were significant at α= 0.05 level with accuracies of 96.39% and 97.23% for estimating average height and average DBH.With the increase of Quercus mongolica stand age,fast-growing period of average DBH was later than that of average height.The growth of average height was fastest approximately at year 15,while the growth of average DBH was fastest approximately at year 23.The growth of average tree height changing with the stand average DBH was fastest when the average DBH was about 10 cm,then it decreased gradually.【Conclusion】The established system of equations for average height-DBH curve was reasonable,which considers both the compatibility and consistence of average height-DBH curve,average DBH-age curve and average height-age curve and the measurement error of independent variable. |
| Key words: Quercus mongolica model with measurement error height-diameter curve |
