摘要
【目的】研究广东琼楠树高(H)、胸径(DBH)、材积(V)与树龄(T)间的回归关系及最优生长模型,以期掌握广东琼楠的生长规律,为林木快速生长期的科学抚育及森林质量和产量的提高提供参考。【方法】以广西南宁树木园内33年生广东琼楠人工林为研究对象,采用树干解析的方法对广东琼楠人工林测树因子各年间变化动态进行测定。【结果】33年生广东琼楠人工林的平均胸径、树高和材积分别为23. 6 cm、19. 7 m和0. 37471 m^3;树高和胸径的平均生长量曲线和连年生长量曲线出现多个交叉点,变化幅度较大,但其单株材积生长曲线在33年间不断攀升,表现良好的生长趋势。各生长曲线表明6～12年为广东琼楠的速生期,所拟合回归模型R^2均达到0. 99以上,检验精度较高。【结论】广东琼楠树高最优生长模型为苏马克(Schumacher)模型,胸径生长最优模型为理查德(Richards)模型,材积生长最优模型为坎派兹(Compertz)模型; 30～32年之间材积生长达到数量成熟;拟合模型精度较高,可运用于生产实践中的预测。
【Objective】To master the growth law of Beilschmiedia fordii,and to provide reference for the scientific tending of forest in the rapid growing period and the improvement of forest quality and yield,the regression relationship between tree height(H),diameter at breast height(DBH),volume(V)and age(T)and the optimal growth models of Beilschmiedia fordii were studied.【Method】Investigation was conducted on the growth regularity of Beilschmiedia fordii in a 33-year-old plantation located in Nanning Arboretum of Guangxi.The dynamic changes over the years of tree-measuring factors of Beilschmiedia fordii was measured by the method of trunk analysis.【Result】The average DBH,tree height and valume of 33-year old Beilschmiedia fordii plantation were 23.6cm,19.7m,0.37471 m^3,respectively.Several cross points were presented in the curves of average and successive growth of H and DBH,and wide variations were observed.However,the individual tree volume growth curve exhibited a rising trend during 33a,showing good growing potential.The growth curves of different variables demonstrated that the growth of Beilschmiedia fordii in 6-12 years were fast growing periods.The values of R 2 of the simulated models were over 0.99 with high test precision.【Conclusion】The optimal growth models for height,DBH and valume of Beilschmiedia fordii are Schumacher equation,Gompertz equation and Campez equation,respectively.The volume growth between 30a and 32a is mature;the fitted model has high precision and can be used in production practice predictions.
作者
钟连香
米伟
施福军
ZHONG Lian-xiang;MI Wei;SHI Fu-jun(College of Forestry,Guangxi University,Guangxi Nanning 530004,China;Nanning Arboretum of Guangxi,Guangxi Nanning 530031,China)
出处
《西南农业学报》
CSCD
北大核心
2018年第12期2666-2671,共6页
Southwest China Journal of Agricultural Sciences
基金
广西林业厅科技项目(桂科字2009第22号)
关键词
广东琼楠
人工林
树干解析
生长规律
生长模拟
Beilschmiedia fordii
Forest plantation
Stem analysis
Growth regularity
Growth simulation
