辽河口湿地表层土壤有机碳空间分布及影响因素分析  

Spatial Distribution of Soil Organic Carbon and Its Influencing Factors in the Sediments of Liaohe Estuary Wetland in China

作　　者：田文敬 郑冬梅[1,2,3] 孙帆 管强 张仲胜[4] 黄兆辉[1] TIAN Wen-jing;ZHENG Dong-mei;SUN Fan;GUAN Qiang;ZHANG Zhong-sheng;HUANG Zhao-hui(College of Environment,Shenyang University,Shenyang 110044,Liaoning,China;Northeast Geological S&T Innovation Center of China Geological Survey,Shenyang 110034,Liaoning,China;Key Laboratory of Black Soil Evolution and Ecological Effect,Liaoning Province,Shenyang 110034,Liaoning,China;Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,Jilin,China)

机构地区：[1]沈阳大学环境学院,辽宁沈阳110044 [2]东北地质科技创新中心,辽宁沈阳110034 [3]辽宁省黑土地演化与生态效应重点实验室,辽宁沈阳110034 [4]中国科学院东北地理与农业生态研究所,吉林长春130102

出　　处：《湿地科学与管理》2024年第2期29-33,共5页Wetland Science & Management

基　　金：中国地质调查局东北地质科技创新中心区创基金项目(QCJJ2022-25);国家自然科学基金面上项目(42371061)。

摘　　要：为探究辽河口湿地土壤有机碳(SOC)的空间分布及影响因素,利用ArcGIS技术分析了土壤有机碳含量的空间分布,并通过冗余分析确定各因素对有机碳的贡献率。结果表明:辽河口湿地表层土壤有机碳含量为4.35~24.58g/kg,平均值为13.3g/kg。辽河口湿地土壤有机碳含量呈斑块状分布,空间变异由结构性因素和随机因素共同主导,从沿海到内陆,从南向北逐渐增加。土壤有机碳含量整体表现为芦苇土>水稻土>碱蓬土。pH值和砂粒占比(<2μm)共同解释了土壤有机碳含量变异的34%,对辽河口湿地土壤有机碳的贡献率达85.4%,是影响辽河口湿地有机碳含量的主要理化性质。辽河口湿地土壤有机碳较高,空间分布集中,植被类型和pH值是影响土壤有机碳的重要因素。This study was aimed to investigate the spatial distribution soil organic carbon(SOC)and its influencing factors in Liaohe estuary wetland.The spatial distribution of soil organic carbon content was analyzed using ArcGIS,and the contribution of different factors to the organic carbon was determined using redundancy analysis.The topsoil organic carbon content was 13.3 g/kg(4.35~24.58 g/kg).The surface soil organic carbon content was spatially patchy and distributed.The spatial variation was dominated by both structural and stochastic factors,showing a spatial distribution pattern that gradually increased from coastal to inland,and from south to north.The P.australis ranked first in SOC contents as a whole,followed by the O.sativa,S.salsa.The proportion of sand and pH combined to explain 34% of the variation of SOC and contribute 85.4% of SOC,respectively,which were the dominant soil physciochemical properties affecting the soil organic carbon of Liaohe estuary wetland.The soil organic carbon in Liaohe estuary wetland is higher,and the spatial distribution is concentrated.Vegetation types and pH are important factors affecting soil organic carbon.

关 键 词：湿地 土壤有机碳 空间分布 影响因素 

分 类 号：S153.6[农业科学—土壤学]