Universität zu Köln

Zhang, Liming, Zhuang, Qianlai, He, Yujie ORCID: 0000-0001-8261-5399, Liu, Yaling, Yu, Dongsheng, Zhao, Quanying, Shi, Xuezheng, Xing, Shihe and Wang, Guangxiang (2016). Toward optimal soil organic carbon sequestration with effects of agricultural management practices and climate change in Tai-Lake paddy soils of China. Geoderma, 275. S. 28 - 40. AMSTERDAM: ELSEVIER. ISSN 1872-6259

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Abstract

Understanding the impacts of climate change and agricultural management practices on soil organic carbon (SOC) dynamics is critical for implementing optimal farming practices and maintaining agricultural productivity. This study examines the influence of climatic variables and agricultural management on carbon sequestration potentials in Tai-Lake Paddy soils of China using the DeNitrification-DeComposition (DNDC, version 9.1) model, with a high-resolution soil database (1:50,000). Model simulations considered the effects of no-tillage, the application rates of manure, N fertilization, and crop residue, water management, and changes in temperature and precipitation. We found that the carbon sequestration potential in the top soils (0-30 cm) for the 2.32 Mha paddy soils of the Tai-Lake region varied from 4.71 to 44.31 Tg C under the feasible management practices during the period of 2001-2019. The sequestration potential significantly increased with increasing application of N-fertilizer, manure, conservation tillage, and crop residues, with an annual average SOC changes ranged from 107 to 121 kg C ha(-1) yr(-1), 159 to 326 kg C ha(-1) yr(-1), 78 to 128 kg C ha(-1) yr(-1), and 489 to 1005 kg C ha(-1) yr(-1), respectively. Toward mitigating greenhouse emissions and N losses, no-tillage and increase of crop residue return to soils as well as manure application are recommended for agricultural practice in this region. Our analysis of climate impacts on SOC sequestration suggests that the rice paddies in this region will continue to be a carbon sink under future warming conditions. Specifically, with rising air temperature of 2.0 degrees C and 4 degrees C, the average annual SOC changes were 52 and 21 kg C ha(-1) yr(-1), respectively. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Liming UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhuang, Qianlai UNSPECIFIED UNSPECIFIED UNSPECIFIED He, Yujie UNSPECIFIED orcid.org/0000-0001-8261-5399 UNSPECIFIED Liu, Yaling UNSPECIFIED UNSPECIFIED UNSPECIFIED Yu, Dongsheng UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, Quanying UNSPECIFIED UNSPECIFIED UNSPECIFIED Shi, Xuezheng UNSPECIFIED UNSPECIFIED UNSPECIFIED Xing, Shihe UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Guangxiang UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-269337
DOI:	10.1016/j.geoderma.2016.04.001
Journal or Publication Title:	Geoderma
Volume:	275
Page Range:	S. 28 - 40
Date:	2016
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1872-6259
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GREENHOUSE-GAS EMISSIONS; NO-TILLAGE; DIFFERENT FERTILIZATION; MAINLAND CHINA; N2O EMISSIONS; RICE FIELDS; DNDC MODEL; TERM; CROPLANDS; IMPACTS Multiple languages Soil Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26933