林业科学研究2026，Vol.39Issue(4)：56-66,11.DOI:10.12403/j.1001-1498.20250340
环境与林分特征因子对桉树人工林水分利用效率的影响机制
Mechanisms by Which Environmental and Stand Characteristics Influence Water Use Efficiency in Eucalyptus Plantations
摘要
Abstract
[Objective]In the context of global warming,this study systematically investigated the mechan-isms by which environmental factors,including climate type,temperature,precipitation,altitude,and soil properties,and stand characteristic factors,including stand age,tree height,diameter at breast height,and stand density,influence the water use efficiency(WUE)of Eucalyptus.[Methods]A total of 289 observa-tional data from 36 studies worldwide were analyzed.Environmental factors were divided into subgroups,and differences in WUE among subgroups were examined using the Wilcoxon rank-sum test combined with multiple comparison methods.Random forest analysis and structure equation modelling were further employed to identify the key factors affecting Eucalyptus WUE and to elucidate their mechanisms.[Results]Eucalyptus plantations in semi-arid and semi-humid regions exhibited higher WUE than those in humid and arid regions.The highest WUE was observed when soil pH ranged from 6.0 to 6.7,mean annu-al precipitation ranged from 1 210 to 1 400 mm,and mean annual temperature ranged from 22.0 to 23.5℃.Among soil factors,total soil potassium was the most influential factor affecting WUE.Relatively high WUE was also associated with young stands and stand densities of approximately 2 150 trees per hectare.[Conclusions]The WUE of Eucalyptus plantations is jointly regulated by environmental conditions and stand characteristics.Optimizing stand structure,particularly stand age and stand density,can signific-antly enhance WUE.This study reveals the response patterns of Eucalyptus WUE to hydrothermal gradi-ents and soil nutrients,providing scientific guidance for water management,stand structure optimization,and sustainable plantation management.关键词
气候变化/碳水循环/林分特征/土壤理化性质/水热条件/随机森林Key words
climate change/carbon and water cycle/stand characteristics/soil physiochemical properties/hydrothermal conditions/random forest分类
农业科技引用本文复制引用
刘斌,文雅,潘海燕,杨洋,杨帆,韦萱,廖全徐,程振涛,杨铭霞..环境与林分特征因子对桉树人工林水分利用效率的影响机制[J].林业科学研究,2026,39(4):56-66,11.基金项目
国家自然科学青年基金项目(42401576) （42401576）
广西自然科学青年基金项目(2025GXNSFBA069471) （2025GXNSFBA069471）
广西大学人才引进项目 （）
