Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Zhang, Liming UNSPECIFIED orcid.org/0000-0002-6281-1285 UNSPECIFIED Zhuang, Qianlai UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Xiaodi UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, Quanying UNSPECIFIED UNSPECIFIED UNSPECIFIED Yu, Dongsheng UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, Yaling UNSPECIFIED UNSPECIFIED UNSPECIFIED Shi, Xuezheng UNSPECIFIED UNSPECIFIED UNSPECIFIED Xing, Shihe UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Guangxiang UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language SOIL ORGANIC-CARBON; GREENHOUSE-GAS EMISSIONS; CLIMATE-CHANGE; DNDC MODEL; MATTER DYNAMICS; RICE FIELDS; RESPIRATION; INCREASE; NITROGEN; STORAGE Multiple languages Soil Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27814