森林与环境学报2025，Vol.45Issue(4)：337-346,10.DOI:10.13324/j.cnki.jfcf.202412029
酸雨对杉木凋落叶分解过程土壤微生物的影响
Effects of acid rain on soil microbes during decomposition of Chinese fir leaf litter
摘要
Abstract
To reveal the effects of different acid rain types on soil microbes during the decomposition of Cunninghamia lanceolata leaf litter,a field simulation experiment was conducted with the leaf litter bag decomposition method in a 13-year-old C.lanceolata forest.Different types of acid rain(H2 SO4,mix,and HNO3)were simulated.Soil samples were collected after 180 days and 360 days of decomposition to determine the composition and diversity of the microbial community and to construct co-occurrence networks.In addition,the relationship of acid rain types with microbial community composition and diversity was explored.The results showed that acid rain treatments altered the abundance of some dominant microbial groups in the soil.After 180 days of decomposition,the relative abundance of Acidobacteria in the soil under nitric acid treatment increased by 7.35%compared with that in the control(P<0.05).After 360 days of decomposition,the relative abundance of Actinobacteria in the soil under mixed acid treatment increased by 38.8%compared with that in the control(P<0.05),indicating that the decomposition duration of the leaf litter and the type of acid rain drove the succession of dominant microbial phyla in the soil.The decomposition duration of the leaf litter had a greater impact on soil microbial diversity than the type of acid rain.The soil bacterial α-diversity was affected by both the decomposition time of the leaf litter and the type of acid rain(P<0.05),while the soil fungal α-diversity was only sensitive to the decomposition duration of the leaf litter.The type of acid rain had a greater impact on the soil bacterial β-diversity than on the soil fungal β-diversity.Acid rain increased the complexity of the soil microbial interaction network,increased the interaction frequency among soil microorganisms,inhibited soil microbial collaboration,and intensified soil microbial competition.The changes in network complexity and interaction relationships proved that acid rain drove the transformation of the soil microbial community from a collaborative mode to a competitive mode by strengthening competitive interactions.During the transition of acid rain from sulfuric acid type to nitric acid type,the complexity of the soil microbial co-occurrence network decreased,and the competition among microorganisms reduced.关键词
杉木林/酸雨/土壤微生物/凋落叶分解/共现网络Key words
Chinese fir plantation/acid rain/soil microbes/leaf litter decomposition/co-occurrence network分类
林学引用本文复制引用
艾宇,褚宣佑,刘雨晖,李明,吴鹏飞,马祥庆..酸雨对杉木凋落叶分解过程土壤微生物的影响[J].森林与环境学报,2025,45(4):337-346,10.基金项目
"十四五"国家重点研发计划项目"杉木大径级无节良材培育技术"(2021YFD2201302) （2021YFD2201302）
人工林可持续经营福建省高校工程研究中心资助(KJG23012AYX). （KJG23012AYX）
