摘要
选取中国四种典型区域(东北黑土区、南方红壤丘陵区、北方黄土高原区、西南岩溶区),概述了不同类型区域坡面水文过程与土壤有机碳迁移的关系,分析了坡面水文过程驱动下土壤有机碳迁移的影响因素。结果表明,不同类型区域的土壤有机碳迁移路径及形式因其水文过程不同而存在差异性,土壤类型、降雨强度、坡度等自然因素会影响土壤有机碳迁移路径及在泥沙中富集;而耕作、施肥、土地利用等人为因素既会改变土壤有机碳含量和外源输入而影响其迁移量,也会影响土壤有机碳迁移路径。在对前人研究成果的总结的基础上,本文认为应加强红壤区及岩溶区不同土壤有机碳迁移路径的同步监测研究,明晰水力侵蚀作用下土壤有机碳迁移转化过程与微生物群落之间的耦合关系,建立考虑多维度、多界面水文过程驱动下土壤有机碳迁移模型。
Hillslope hydrological process is the basic unit of watershed hydrological process.The runoff and sediment are generated and transported on the hillslope,thereby impacting on the dynamics of soil organic carbon(SOC)pool.Studying the migration of SOC driven by hillslope hydrological process will be helpful to get in-depth understanding of carbon cycling at the watershed or broader scale.This review collected data from four typical regions(i.e.,Northeastern Black Soil region,Southern Hilly Red Soil region,Northern Loess Plateau region,and Southwestern Karst region)in China,and then the relationships between hydrological process and SOC migration were discussed on the slope.Meanwhile,the effects of soil types,rainfall intensity,slope,tillage practices,fertilization,and land use on SOC migration were also analyzed.The results showed that hydrological processes leaded to distinct migration paths and forms of SOC in different regions.Furthermore,soil types,rainfall intensity,and slope changed the migration of SOC and which of accumulation in sediments by influencing the runoff path and sediment generation.Tillage practices,fertilization,and land use not only affected the amount of SOC migration through changing the SOC content and exogenous input,but also affected the migration paths and forms of SOC.Finally,it should be strengthened in the future that the synchronous monitoring of different SOC migration paths in hilly red soil regions and karst regions,coupled relationship between the SOC migration and transformation processes and microbial community during the water erosion process,and the modeling simulation of SOC dynamics from the perspectives of multi-dimensional and multi-interface hydrological processes.
作者
张宇恒
刘春
付智勇
何春欢
吴志男
黄伟佳
ZHANG Yu-heng;LIU Chun;FU Zhi-yong;HE Chun-huan;WU Zhi-nan;HUANG Wei-jia(Department of Ecology,Jinan University,Guangzhou 510632,China;Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2023年第3期730-738,共9页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(42007049,42077077)
广东省基础与应用基础研究基金项目(2020A1515110524)
粤桂科技合作基础与应用基础研究项目(2021JJYGD150044)资助。
关键词
坡面水文过程
土壤有机碳
可溶性有机碳
碳迁移
Hillslope hydrological process
Soil organic carbon
Dissolved organic carbon
Carbon migration
