Zhang, Liming ORCID: 0000-0002-6281-1285, Zhuang, Qianlai, Li, Xiaodi, Zhao, Quanying, Yu, Dongsheng, Liu, Yaling, Shi, Xuezheng, Xing, Shihe and Wang, Guangxiang (2016). Carbon sequestration in the uplands of Eastern China: An analysis with high-resolution model simulations. Soil Tillage Res., 158. S. 165 - 177. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1879-3444

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Abstract

Using the DeNitrification-DeComposition (DNDC, version 9.5) model, we investigated the soil organic carbon (SOC) changes from 1980 to 2009 in Eastern China's upland-crop fields in northern Jiangsu Province. A currently most detailed high-resolution soil database, containing 17,024 polygons at a scale of 1:50,000, derived from 983 unique upland soil profiles, was used. A coarser county-level soil database was also used for a pair-wise simulation for comparison. We found that SOC changes modeled with the county-level soil database differ significantly from those with high-resolution soil data, with the deviation ranging from -64% to 8.0% in different counties. This implies that coarse soil data may lead to large biases in SOC simulation. With the high-resolution database, the model estimates a SOC increase of 37.89 TgC in the top soils (0-50 cm) over the study area of 3.93 Mha for the past three decades, with an average rate of 322 kg C ha(-1) year(-1). The SOC accumulation in the study region accounts for 10.2% of annual national carbon sequestration of upland soils, compared with the fraction of 3.7% in the total upland area of China. This underscores its significance to national climate mitigation. The annual SOC change varied between 61 to 519 kg C ha(-1) year mainly driven by the variations in N-fertilizer and manure applications. This study highlights the significance of high-resolution soil databases in quantifying SOC changes. Our high-resolution estimates of SOC will support farming and carbon management in this region. (C) 2016 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Zhang, LimingUNSPECIFIEDorcid.org/0000-0002-6281-1285UNSPECIFIED
Zhuang, QianlaiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Li, XiaodiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhao, QuanyingUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yu, DongshengUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, YalingUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shi, XuezhengUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Xing, ShiheUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, GuangxiangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-278141
DOI: 10.1016/j.still.2016.01.001
Journal or Publication Title: Soil Tillage Res.
Volume: 158
Page Range: S. 165 - 177
Date: 2016
Publisher: ELSEVIER SCIENCE BV
Place of Publication: AMSTERDAM
ISSN: 1879-3444
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SOIL ORGANIC-CARBON; GREENHOUSE-GAS EMISSIONS; CLIMATE-CHANGE; DNDC MODEL; MATTER DYNAMICS; RICE FIELDS; RESPIRATION; INCREASE; NITROGEN; STORAGEMultiple languages
Soil ScienceMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/27814

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