华南农业大学学报2025，Vol.46Issue(3)：370-378,9.DOI:10.7671/j.issn.1001-411X.202409025
林分胸径和树高关系评价全国针叶树种立地质量的适用性
Applicability of the relationship between stand DBH and height to evaluate the site quality of major coniferous stands in China
摘要
Abstract
[Objective]To establish a scientific site quality evaluation system,guide forestry production practice.[Method]Based on the number of major coniferous forest stand plots across the country,16 coniferous tree groups were classified.The Richards,Logistic,and Korf models were applied to fit the guiding curves and establish a site form index model,which was then validated through a scatter plot test.Data from four consecutive forest inventory periods from 1999 to 2018 were used to analyze dynamic changes in site form levels.[Result]The mean coefficients of determination for guiding curves fitted with the Richards,Logistic,and Korf models were all above 0.95.The scatter plot validation of the established site form index model showed test values exceeding 90.00%,with an average value of 96.59%,indicating its feasibility for practical use.Over 20 years,site quality for coniferous stands improved,with a combined proportion increase of 7.60 percent in grades I and II,a 3.50 percent decrease in grade III,and a combined reduction of 4.10 percent in grades IV and V.[Conclusion]Developing a national unified site quality assessment model based on DBH-height relationships is feasible and reasonable.This approach reduces the impact deviations of climate-induced and age-based growth rate on site quality assessment,allowing for comparable site quality evaluations across regions.The model demonstrates good applicability on a large scale,though it is essential to consider potential uncertainties due to management practices and limited sample data.关键词
立地质量/胸径-树高/动态变化/针叶林分Key words
Site quality/DBH-height/Dynamic change/Coniferous forest stand分类
农业科技引用本文复制引用
吴恒,田相林,罗春林..林分胸径和树高关系评价全国针叶树种立地质量的适用性[J].华南农业大学学报,2025,46(3):370-378,9.基金项目
国家财政专项(2130207) （2130207）
国家林业和草原局西南调查规划院科技项目(2023-09) （2023-09）
