1980—2008年苏北旱地土壤有机碳含量变化特征  

Dynamic characteristics of soil organic carbon in the upland of northern Jiangsu Province between 1980 and 2008

作　　者：路晓彤 刘绍贵 张黎明[1] 于东升[3] 史学正[3] 邢世和[1] LU Xiaotong;LIU Shaogui;ZHANG Liming;YU Dongsheng;SHI Xuezheng;XING Shihe(College of Resourse and Environment Science,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Station of Agriculture Environmental Monitoring,Yangzhou,Jiangsu 225603,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing,Jiangsu 210008,China)

机构地区：[1]福建农林大学资源与环境学院,福建福州350002 [2]扬州市农业环境监测站,江苏扬州225603 [3]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏南京210008

出　　处：《福建农林大学学报（自然科学版）》2020年第1期132-139,共8页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：国家自然科学基金项目(41971050);中国博士后科学基金项目(2017M612109);福建省自然科学基金项目(2019J01660)

摘　　要：利用基于江苏北部旱地1980年第2次土壤普查的983个旱地剖面和2008年农业部测土配方施肥项目1506个样点数据建立的1∶5万高精度土壤数据库,对该地区表层土壤(0~20 cm)有机碳含量变化特征进行了研究.结果表明:1980—2008年苏北旱地土壤有机碳含量由6.00 g·kg^-1增长到10.30 g·kg^-1,增幅为71.67%.从土壤类型来看,有机碳增幅最大的是分布面积最广的潮土,上升了5.12 g·kg^-1,棕壤和紫色土次之,分别上升了4.91和4.80 g·kg^-1,而增幅最小的是石灰土,仅上升了0.01 g·kg^-1.从行政单元来看,各地级市的土壤有机碳含量上升范围在3.0~5.0 g·kg^-1之间,其中大多数县的土壤有机碳含量上升范围在2.4~6.0 g·kg^-1之间.总体来看,苏北旱地土壤有机碳的累积程度与气候、有机碳初始值及肥料施用量密切相关.Based on 983 upland soil profiles from China′s Second National Soil Survey in 1980 and data from 1506 formulated fertilization trials under Ministry of Agriculture in 2008,a 1∶50000 high-precision soil database was established to study the dynamic performance of soil organic carbon(SOC)content in the farmlands(0-20 cm soil layer)in northern Jiangsu Province.The results showed that the mean SOC content increased from 6.00 to 10.30 g·kg^-1,by 71.67%in the study region.Among different soil types,SOC growth rate of fluvo-aquic soil was the highest,reaching 5.12 g·kg^-1,followed by brown soil(by 4.91 g·kg^-1)and purplish soil(by 4.80 g·kg^-1).SOC variation in limestone soil was the lowest,which was by 0.01 g·kg^-1 only.Among different administration areas,SOC content varied between 3.0 and 5.0 g·kg^-1 under prefectural city level,and SOC content ranged between 2.4 and 6.0 g·kg^-1 under county level.In general,variation in SOC content was a confluence of climate,initial SOC content and fertilizer application.

关 键 词：土壤有机碳 高精度土壤数据库 旱地 含量动态 

分 类 号：S159.9[农业科学—土壤学]