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Economics- and policy-driven organic carbon input enhancement dominates soil organic carbon accumulation in Chinese croplands
Zhao, Yongcun1; Wang, Meiyan1; Hu, Shuijin2,3; Zhang, Xudong4; Ouyang, Zhu5; Zhang, Ganlin1; Huang, Biao6; Zhao, Shiwei7; Wu, Jinshui8; Xie, Deti9; Zhu, Bo10; Yu, Dongsheng1; Pan, Xianzhang1; Xu, Shengxiang1; Shi, Xuezheng1
2018-04-17
Source PublicationPROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
Volume115Issue:16Pages:4045-4050
Corresponding AuthorShi, Xuezheng(xzshi@issas.ac.cn)
AbstractChina's croplands have experienced drastic changes in management practices, such as fertilization, tillage, and residue treatments, since the 1980s. There is an ongoing debate about the impact of these changes on soil organic carbon (SOC) and its implications. Here we report results from an extensive study that provided direct evidence of cropland SOC sequestration in China. Based on the soil sampling locations recorded by the Second National Soil Survey of China in 1980, we collected 4,060 soil samples in 2011 from 58 counties that represent the typical cropping systems across China. Our results showed that across the country, the average SOC stock in the topsoil (0-20 cm) increased from 28.6 Mg C ha(-1) in 1980 to 32.9 Mg C ha(-1) in 2011, representing a net increase of 140 kg C ha(-1) year(-1). However, the SOC change differed among the major agricultural regions: SOC increased in all major agronomic regions except in Northeast China. The SOC sequestration was largely attributed to increased organic inputs driven by economics and policy: while higher root biomass resulting from enhanced crop productivity by chemical fertilizers predominated before 2000, higher residue inputs following the large-scale implementation of crop straw/stover return policy took over thereafter. The SOC change was negatively related to N inputs in East China, suggesting that the excessive N inputs, plus the shallowness of plow layers, may constrain the future C sequestration in Chinese croplands. Our results indicate that cropland SOC sequestration can be achieved through effectively manipulating economic and policy incentives to farmers.
Keywordsoil organic carbon Chinese cropland crop residue management carbon sequestration
DOI10.1073/pnas.1700292114
WOS KeywordLAST 2 DECADES ; CLIMATE-CHANGE ; NO-TILLAGE ; LAND-USE ; MATTER ; SEQUESTRATION ; AGRICULTURE ; MANAGEMENT ; INCREASE ; IMPACTS
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDA05050000] ; National Natural Science Foundation of China[41471177] ; National Natural Science Foundation of China[41401240] ; National Natural Science Foundation of China[41571209]
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000430191900045
PublisherNATL ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57453
Collection中国科学院地理科学与资源研究所
Corresponding AuthorShi, Xuezheng
Affiliation1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Jiangsu, Peoples R China
3.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC 27695 USA
4.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
6.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China
7.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China
8.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China
9.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China
10.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Yongcun,Wang, Meiyan,Hu, Shuijin,et al. Economics- and policy-driven organic carbon input enhancement dominates soil organic carbon accumulation in Chinese croplands[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(16):4045-4050.
APA Zhao, Yongcun.,Wang, Meiyan.,Hu, Shuijin.,Zhang, Xudong.,Ouyang, Zhu.,...&Shi, Xuezheng.(2018).Economics- and policy-driven organic carbon input enhancement dominates soil organic carbon accumulation in Chinese croplands.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(16),4045-4050.
MLA Zhao, Yongcun,et al."Economics- and policy-driven organic carbon input enhancement dominates soil organic carbon accumulation in Chinese croplands".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.16(2018):4045-4050.
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