热带农业科学2025，Vol.45Issue(4)：35-43,9.DOI:10.12008/j.issn.1009-2196.2025.04.006
目标树经营模式对香合欢天然次生中龄林下多样性的影响
Effects of Target Tree Management on Understory Plant Diversity in Native Secondary Middle-Aged Albizia odoratissima Forests
摘要
Abstract
To promote the restoration and sustainable management of Albizia odoratissima natural secondary forests,this study evaluated the effects of different target-tree management regimes on understory vegetation structure and diversity in middle-aged Albizia odoratissima forests at Yachang Forest Farm,Guangxi.The results indicated that the species richness of understory shrubs and herbs increased significantly after management,with the highest values observed in Treatment A3(Target tree retention density of 135 plants/hm2,fertilizer application rate of 1.00 kg/plant),which included 21 shrubs and 13 herb species.There was a negative correlation between species richness and target-tree density,but no significant response to fertilization was detected.Compared with the control stands,the Managed stands presented greater diversity indices,with Treatment A3 showing the highest diversity indices.The shrub layer responded more strongly to thinning intensity,with diver-sity indices decreasing as the target-tree retention density increased.Under the same target-tree retention density,shrub rich-ness and Pielou's evenness increased linearly with fertilization,whereas the herb layer metrics(richness,Shannon-Wiener index,and Simpson index)followed unimodal trends,increasing initially and then decreasing with increasing fertilization.关键词
香合欢/目标树经营/群落多样性/密度/施肥Key words
Albizia odoratissima/target-tree management/understory diversity/density/fertilization分类
农业科技引用本文复制引用
岑祚舟,欧汉彪,李伟彬,许基煌,韦铄星,李佳男..目标树经营模式对香合欢天然次生中龄林下多样性的影响[J].热带农业科学,2025,45(4):35-43,9.基金项目
广西重点研发计划项目(No.桂科AB24010090) （No.桂科AB24010090）
广西自筹经费林业科技项目(No.2023GXZCLK 35) （No.2023GXZCLK 35）
广西自筹经费林业科技项目(No.桂林科研[2022ZC]第105号). （No.桂林科研[2022ZC]第105号）
