西南林业大学学报2024，Vol.44Issue(9)：129-135,7.DOI:10.11929/j.swfu.202312031
天然次生白桦单木冠幅预测模型研究
Model for Predicting Individual Tree Crown Width of Natural Secondary Betula platyphylla
摘要
Abstract
A total of 1 844 Betula platyphylla trees from 30 natural secondary B.platyphylla forest plots in Danqinghe Forest Farm,Yilan County,Harbin City,Heilongjiang Province were studied,to find the optimal mod-el to predict B.platyphylla crown width from 10 commonly used basic prediction models,and reparameterize the model based on an analysis of the correlation between individual tree factors and crown width.Finally,introduce random effects at the plot level to construct a mixed-effects model for predicting the crown width of natural sec-ondary B.platyphylla.The results showed that the Logistic model was most suitable for describing the variation in crown width of B.platyphylla,and the introduction of crown base height,height-to-diameter ratio and crown rate could improve the prediction accuracy of the model.The introduction of random effects at the plot level has im-proved the issue of heteroscedasticity in the data and further enhanced the predictive performance for crown width.Consequently,it is recommended to employ a nonlinear mixed-effects model for predicting the crown width of natural secondary B.platyphylla in practical production.This approach will enhance the accuracy of crown width estimation and provide a more scientifically valid theoretical foundation for the sustainable manage-ment of natural secondary B.platyphylla.关键词
天然次生林/白桦/冠幅模型/混合效应模型Key words
natural secondary forest/Betula platyphylla/crown-width prediction model/mixed-effects model分类
林学引用本文复制引用
高畅,王帆..天然次生白桦单木冠幅预测模型研究[J].西南林业大学学报,2024,44(9):129-135,7.基金项目
国家重点研发计划项目(2022YFD2201003-02)资助 （2022YFD2201003-02）
市技术服务项目黑龙江省嘉荫县生态系统各碳库碳储量本底调查及动态分析项目(HFW220100057)资助. （HFW220100057）
