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2 City college, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309574773932392485, articleId=1309574771776520228, tenantId=1146029695717560320, journalId=1308397196074385509, language=CN, title=湿润区草地退化对土壤团聚体结构重组及碳库响应的结构调控机制, columnId=1309565024058835950, journalTitle=草地学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=草地退化是影响土壤结构稳定性与碳循环过程的重要驱动因素，但湿润气候条件下其作用路径及调控机制仍缺乏定量解析。本研究以湖南南山牧场典型山地草甸为对象，基于退化梯度（ND，LD，MD，HD），系统分析了0~30 cm土层土壤团聚体结构及有机碳分布特征。结果表明，随着退化程度加剧，>5 mm大团聚体含量下降约47%，<0.25 mm微团聚体含量增加约168%，机械稳定性和水稳性团聚体的平均重量直径（MWD）和几何平均直径（GMD）分别降低约46%，53%，分形维数显著升高，表明土壤结构由稳定态向破碎态转变。大团聚体破碎释放碳，其中一部分被微团聚体吸附封存，导致碳在团聚体中的分布由“大团聚体主导”向“微团聚体主导”转变。草地退化同时引起土壤有机碳总量下降与碳结构性重组，显示土壤团聚体在碳保护和分配中的关键作用。本研究揭示了湿润区草地退化驱动的碳库变化及其结构性机制，为退化草地生态修复与碳汇管理提供了理论依据。, authors=黄惠群¹, 刘西苑¹, 朱晓花¹, 曾和平², authorsList=黄惠群, 刘西苑, 朱晓花, 曾和平, authorCompany=1 邵阳市草地资源保护中心, 湖南 邵阳 422000;
2 昆明理工大学城市学院, 云南 昆明 650500, correspAuthors=null, authorNote=黄惠群（1989-），男，苗族，湖南邵阳人，硕士研究生，主要从事生态保护与修复、生态系统功能与生物多样性、植物-土壤-微生物互作、草种质资源收集与培育、林草技术推广等研究，E-mail:978344016@qq.com, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=sK+TK1qLoIiIf9qG+qSPCQ==, pdfFileSize=3807402, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=南山国家公园草地生态系统定位监测研究 (XLK202108-10); 国家自然科学基金项目 (41461061))}, authors=[Author(id=1320972827495354802, tenantId=1146029695717560320, journalId=null, articleId=1309574771776520228, orderNo=null, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=null, email=null, emailSecond=null, emailThird=null, correspondingAuthor=null, 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