文献类型：期刊文献

中文题名：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

英文题名：Effects of Target Tree Management on Understory Plant Diversity in Native Secondary Middle-Aged Albizia odoratissima Forests

作者：岑祚舟[1] 欧汉彪[2] 李伟彬[3] 许基煌[4] 韦铄星[2] 李佳男[5]

第一作者：岑祚舟

机构：[1]广西国有雅长林场,广西百色533000;[2]广西壮族自治区林业科学研究院,广西南宁530002;[3]南宁市野生动植物保护站,广西南宁530002;[4]中国林科院热带林业实验中心,广西凭祥532600;[5]广西大学,广西南宁530002

年份：2025

卷号：45

期号：4

起止页码：35-43

中文期刊名：热带农业科学

外文期刊名：Chinese Journal of Tropical Agriculture

基金：广西重点研发计划项目(No.桂科AB24010090);广西自筹经费林业科技项目(No.2023GXZCLK 35);广西自筹经费林业科技项目(No.桂林科研[2022ZC]第105号)。

语种：中文

中文关键词：香合欢;目标树经营;群落多样性;密度;施肥

外文关键词：Albizia odoratissima;target-tree management;understory diversity;density;fertilization

分类号：S533

摘要：为了促进香合欢天然次生林的恢复与可持续经营,以广西国有雅长林场香合欢天然次生中龄林为研究对象,探讨不同目标树经营模式对香合欢林下植被结构和多样性的影响。结果表明:目标树经营后香合欢次生中龄林下灌草物种数量显著提高,灌木层、草本层最高均是A3(目标树保留密度135株/hm2,施肥量1.00 kg/株),灌木和草本层分别为21和13种,且随着目标树保留株数减少而增加,林下灌木层、草本层的物种数量受施肥量的影响不显著;目标树经营后香合欢天然次生中龄林下多样性指数显著高于对照组,且A3的各多样性指数均显著最高;灌木层的间伐响应大于草本层,灌木层多样性指数均大于草本层,且随目标树保留密度增加而减小。在目标树保留密度相同的情况下,灌木层的丰富度指数、Pielou均匀度指数表现为随着施肥量的增加而增加;草本层的丰富度指数、Shannon-Wiener指数和Simpson指数表现为随施肥量增大而先增后减。
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.