摘要
【目的】揭示亚热带毛竹Phyllostachysedulis扩张过程中,通过影响土壤微生物残体碳累积,调控常绿阔叶林土壤有机碳动态变化的规律。【方法】以微生物残体标志物——氨基糖为研究对象,探究浙江省安吉县灵峰寺国有林场常绿阔叶林、毛竹-阔叶混交林和毛竹纯林的表层土壤(0~10 cm)微生物残体碳的累积效应,以及与有机碳的关联特征。【结果】毛竹扩张过程中,土壤真菌残体碳、细菌残体碳和总微生物残体碳质量分数均显著下降(P<0.05),分别下降了36.76%、35.13%和40.32%,且毛竹扩张过程中凋落物年产量能够通过间接影响土壤有机碳以及土壤真菌生物量、细菌生物量和总微生物生物量,进而分别影响土壤真菌残体碳、细菌残体碳和总微生物残体碳的累积效应。在毛竹扩张前期(常绿阔叶林到毛竹-阔叶混交林)土壤真菌残体碳、细菌残体碳和总微生物残体碳占有机碳的比值变化并不显著,但是在毛竹扩张后期(毛竹-阔叶混交林到毛竹纯林),土壤真菌残体碳、细菌残体碳和总微生物残体碳占有机碳的比值显著提高(P<0.05)。【结论】毛竹向常绿阔叶林扩张过程中微生物源碳对土壤有机碳形成的作用逐渐增加。图4表1参26.
[Objective]This study is to reveal the dynamic changes of soil organic carbon(SOC)in evergreen broad-leaved forests during the expansion of Phyllostachys edulis in subtropical regions by affecting the accumulation of soil microbial residue carbon.[Method]Taking amino sugar as the research object,this study investigated the accumulative effect of microbial residue carbon in surface soil(0-10 cm)of evergreen broad-leaved forest,Ph.edulis and broad-leaved mixed forest,and pure Ph.edulis forest in the state-owned forest farm of Lingfengsi in Anji,Zhejiang Province,as well as the correlation characteristics with organic carbon.[Result]During the expansion of Ph.edulis,soil fungal residue carbon,bacterial residue carbon and microbial residue carbon all significantly(P<0.05)decreased(36.76%,35.13%and 40.32%,respectively),and the annual litter production indirectly affected SOC,fungi biomass,soil bacteria biomass and total microbial biomass,thereby affecting the cumulative effects of soil fungal residue carbon,bacterial residue carbon and total microbial residue carbon,respectively.There was no significant change in the ratio of fungal residue carbon,bacterial residue carbon and total microbial carbon residue to SOC in the early stage of Ph.edulis expansion(from evergreen broad-leaved forest to Ph.edulis and broad-leaved mixed forest),but in the late stage of expansion(from Ph.edulis and broad-leaved mixed forest to Ph.edulis forest),the ratio increased significantly.[Conclusion]The role of microbial carbon on SOC gradually increases during the expansion of Ph.edulis into evergreen broad-leaved forests.[Ch,4 fig.1 tab.26 ref.]
作者
邵帅
王中乾
潘灵强
郑云游
郑旭理
田立斌
徐秋芳
SHAO Shuai;WANG Zhongqian;PAN Lingqiang;ZHENG Yunyou;ZHENG Xuli;TIAN Libin;XU Qiufang(College of Environment and Resources/College of Carbon Neutrality,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Lingfengsi Forest Farm of Anji County,Anji 313300,Zhejiang,China;College of Forestry,Beijing Forestry University,Beijing 100083,China)
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2024年第5期1005-1012,共8页
Journal of Zhejiang A&F University
基金
浙江省自然科学基金资助项目(LQ24D010002)
国家自然科学基金资助项目(42307383)。
关键词
毛竹扩张
土壤有机碳
微生物残体碳
氨基糖
Phyllostachys edulis expansion
soil organic carbon
microbial residue carbon
amino sugar
作者简介
邵帅(ORCID:0000-0003-3791-5872),讲师,从事土壤碳组分研究。E-mail:shuaishao2019@zafu.edu.cn。
