摘要
在对鄂西山区柳杉Cryptomeria fortunei人工林60块标准地立地分级基础上,采用非线性度量误差联立方程组法建立了柳杉人工林全林整体模型,保证了模型的相容性和无偏估计;模型检验结果表明各林分因子的平均相对误差和相对均方误差均在6.5%以下,模型参数稳定性及预测精度均较高;同时,应用全林整体模型可对不同初始条件的柳杉人工林林分生长进行模拟预测、定量间伐作业设计以及绘制不同立地条件的林分密度控制图。
Based on the site classification of 60 standard plots of Cryptomeria fortunei plantation in the mountains area of Western Hubei,an integrated stand growth model of C.fortunei plantation was established by using the method of nonlinear measurement error simultaneous equations,which ensured the compatibility and unbiased estimation of the model;The model test results show that the average relative error and relative mean square error of each stand factor were below 6.5%,and the stability and prediction accuracy of model parameters were high;At the same time,the integrated stand growth model can be used to simulate and predict the growth of C.fortunei Plantations under different initial conditions,design quantitative thinning operations,and draw stand density control diagrams under different site conditions,providing a scientific reference for the efficient and sustainable management of C.fortunei plantations in the study area.
作者
孙拥康
汤景明
王怡
张宗立
林华
冯骏
蒲元志
SUN Yongkang;TANG Jingming;WANG Yi;ZHANG Zongli;LIN Hua;FENG Jun;PU Yuanzhi(Hubei Academy of Forestry,Wuhan,Hubei 430075,China;Lichuan Forestry Bureau,Lichuan,Hubei 437100,China;State-owned Dashan Mountain Forest Farm in Enshi City,Enshi,Hubei 445000,China;State-owned Changlinggang Forest Farm in Jianshi County,Enshi,Hubei 445300,China)
出处
《林业与环境科学》
2023年第1期41-47,共7页
Forestry and Environmental Science
基金
湖北省林业科技支撑重点项目([2022]LYKJ02),中央财政林业科技推广示范资金项目(鄂[2020]TG07)。
关键词
全林整体模型
柳杉人工林
林分密度控制图
鄂西山区
integrated stand growth model
Cryptomeria fortunei plantation
stand density control diagram
mountain area in Western Hubei
