文献类型：期刊文献

中文题名：不同杉阔混交对退化杉木人工林土壤团聚体分布及其稳定性的影响

英文题名：Effects of different Chinese fir-broadleaf mixed forests on soil aggregate distribution and stability in degraded Chinese fir plantations

作者：王焱[1,2] 肖以华[2] 胡冬南[1] 付志高[2] 朱火生[3] 许涵[2] 史欣[2] 贲春丽[2]

第一作者：王焱

机构：[1]江西农业大学亚热带森林资源培育江西省重点实验室林学院,南昌330045;[2]中国林业科学研究院热带林业研究所,广州510520;[3]广东省乐昌林场,广东乐昌512219

年份：2025

卷号：32

期号：5

起止页码：163-173

中文期刊名：水土保持研究

外文期刊名：Research of Soil and Water Conservation

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划项目(2022YFF1303003-06);广东珠江三角洲森林生态系统国家定位观测研究站项目(0144135);林业生态网络监测平台生态监测数据采集(JY270);广东省林木种质资源调查(SL00102)。

语种：中文

中文关键词：退化杉木人工林;杉阔混交;土壤团聚体;土壤结构稳定性

外文关键词：degraded Chinese fir plantation;Chinese fir-broadleaf mixed forests;soil aggregates;soil structural stability

分类号：S714.2

摘要：[目的]探析不同杉阔混交林土壤团聚体的分布情况及其稳定性特征,为衰退林地土壤稳定性提升和混交阔叶树种选择提供理论依据。[方法]以广东省乐昌林场营造20年的10个不同阔叶树种与杉木混交林分为研究对象,通过干、湿筛分法,探究杉阔混交对退化人工林土壤团聚体粒径分布及稳定性的影响,解析林地土壤理化性质与土壤稳定性之间的关系。[结果](1)所有杉阔混交林地土壤大团聚体(粒径>0.25 mm)均占有较大比重,范围为67%~98%,说明杉阔混交后林下土壤的稳定性较好。(2)总体上看,不同的林分类型间土壤团聚体分布有显著差异;其中,观光木、乐昌含笑和阴香的大团聚体(粒径>0.25 mm)占比更高,而黄樟和木荷的微团聚体(粒径<0.25 mm)占比相对较高。(3)除阴香外,其余混交林分土壤团聚体稳定性均表现出随土层深度的增加而增加的趋势。(4)土壤稳定性与TP,pH,WMC,BD显著正相关,而与PAD,Dm,TN,SOC呈显著负相关,其中TP,TN,SOC,pH是影响土壤稳定性的关键因子。[结论]杉阔混交有利于改善杉木纯林土壤的稳定性,尤其是观光木、乐昌含笑和阴香与杉木混交后对林地土壤稳定性的改善效果较好。
[Objective]To investigate the distribution and stability characteristics of soil aggregates in different Chinese fir-broadleaf mixed forests,providing a theoretical basis for improving soil stability in degraded plantations and selecting suitable broadleaf tree species for mixed planting.[Methods]Ten mixed stands of Chinese fir with different broadleaf species,established 20 years ago in Lechang Forest Farm,Guangdong Province,were selected as study sites.The dry and wet sieving methods were used to analyze the effects of Chinese fir-broadleaf mixed forests on particle size distribution and stability of soil aggregates in degraded plantations.The relationships between soil physicochemical properties and soil stability were explored.[Results](1)In all mixed forests,soil macroaggregates(particle size>0.25 mm)accounted for a large proportion,ranging from 67%to 98%,indicating good soil stability after mixed planting.(2)Overall,significant differences in soil aggregate distribution were observed among different stand types.Specifically,Michelia odora,Michelia chapensis,and Cinnamomum burmanni had a higher proportion of macroaggregates(particle size>0.25 mm),whereas Cinnamomum porrectum and Schima superba had a relatively higher proportion of microaggregates(particle size<0.25 mm).(3)Except for Cinnamomum burmanni,soil aggregate stability in all mixed forest stands tended to increase with soil depth.(4)Soil stability showed significantly positive correlations with total phosphorus(TP),pH,water mass content(WMC),and bulk density(BD),while it was negatively correlated with percentage of aggregate destruction(PAD),mass fractal dimension(Dm),total nitrogen(TN),and soil organic carbon(SOC).Among these,TP,TN,SOC,and pH were key factors affecting soil stability.[Conclusion]Chinese fir-broadleaf mixed forests help improve soil stability in pure Chinese fir forests,with Michelia odora,Michelia chapensis,and Cinnamomum burmanni showing particularly positive effects on soil stability when mixed with Chinese fir.