Effects of site productivity on individual tree maximum basal area growth rates of Eucalyptus pilularis in subtropical Australia  

作　　者：P.W.West 

机构地区：[1]Forest Research Centre,Southern Cross University,Lismore,NSW 2480,Australia

出　　处：《Journal of Forestry Research》2023年第6期1659-1668,共10页林业研究（英文版）

摘　　要：Inventory data were available from 96 plots of even-aged,monoculture,tall-open forests of Eucalyptus pilularis Smith,aged 2-63 years,growing in sub-tropical regions along the east coast of Australia.A model was developed relating the maximum possible stem basal area growth rate of individual trees to their stem basal area.For any tree size,this maximum increased as site productivity increased.However,the size at which this maximum occurred decreased as productivity increased.Much research has shown that,at any stand age,trees of a particular stem basal area are taller on more productive sites than on less productive ones.Taller trees incur greater respiratory costs to ensure maintenance of the photo synthetic capacity of their canopies;this reduces their growth rates.It was concluded that trees with larger basal areas will have the maximum possible growth rate on a less productive site,whilst trees with smaller basal areas will have the maximum possible on a more productive site.The model developed may constitute the first stage of a complete individual tree growth model system to predict wood yields from these forests.

关 键 词：Growth model Individual tree Maximum growth rate Eucalyptus pilularis Physiological eff ects 

分 类 号：S792.39[农业科学—林木遗传育种]