Soil organic carbon sequestration potential of cropland in China

doi:10.1002/gbc.20068

	Soil organic carbon sequestration potential of cropland in China
	Qin, Zhangcai 1,2; Huang, Yao; Zhuang, Qianlai 1,2
	2013
发表期刊	GLOBAL BIOGEOCHEMICAL CYCLES
ISSN	0886-6236
卷号	27 期号:3 页码:711-722
摘要	Soil organic carbon (SOC) in cropland is of great importance to the global carbon (C) balance and to agricultural productivity, but it is highly sensitive to human activities such as irrigation and crop rotation. It has been observed that under certain improved management practices, cropland soils can sequestrate additional C beyond their existing SOC level before reaching the C saturation state. Here we use data from worldwide, long-term agricultural experiments to develop two statistical models to determine the saturated SOC level (SOCS) in upland and paddy agroecosystems, respectively. We then use the models to estimate SOC sequestration potential (SOCP) in Chinese croplands. SOCP is the difference between SOCS and existing SOC level (SOCE). We find that the models for both the upland and paddy agroecosystems can reproduce the observed SOCS data from long-term experiments. The SOCE and SOCS stock in Chinese upland and paddy croplands (0-30cm soil) are estimated to be 5.2 and 7.9 Pg C with national average densities of 37.4 and 56.8Mg C ha(-1), respectively. As a result, the total SOC sequestration potential is estimated to be 2.7 Pg C or 19.4Mg C ha(-1) in Chinese cropland. Paddy has a relatively higher SOCE (45.4Mg C ha(-1)) than upland (34.7Mg C ha(-1)) and also a greater SOCP at 26.1Mg C ha(-1) compared with 17.2Mg C ha(-1) in the upland. The SOC varies dramatically among different regions. Northeast China has the highest SOCE and SOCS density, while the Loess Plateau has the greatest SOCP density. The time required to reach SOC saturation in Chinese cropland is highly dependent on management practices applied. Chinese cropland has relatively low SOC density in comparison to the global average but could have great potentials for C sequestration under improved agricultural management strategies.
关键词	carbon saturation modeling paddy sequestration rate upland
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
DOI	10.1002/gbc.20068
收录类别	SCI
语种	英语
WOS关键词	LAND-USE CHANGE ; VERTICAL-DISTRIBUTION ; CLIMATE-CHANGE ; CLAY CONTENT ; MATTER ; STORAGE ; SATURATION ; MODEL ; MANAGEMENT ; FERTILIZER
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000325488600009
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	1944-9224
资助机构	National Basic Research Program of China on Global Change(National Basic Research Program of China) ; National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; NASA LCLUC project ; Div Of Information & Intelligent Systems ; Direct For Computer & Info Scie & Enginr(National Science Foundation (NSF)NSF - Directorate for Computer & Information Science & Engineering (CISE))
作者邮箱	Zhuang, Qianlai/A-5670-2009 ; huang, yao/GWR-5388-2022 ; Huang, Yao/O-6832-2014 ; Huang, Yao/GQH-3308-2022
引用统计	被引频次：74[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27932
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 2.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA 3.Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA
推荐引用方式 GB/T 7714	Qin, Zhangcai,Huang, Yao,Zhuang, Qianlai. Soil organic carbon sequestration potential of cropland in China[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2013,27(3):711-722.
APA	Qin, Zhangcai,Huang, Yao,&Zhuang, Qianlai.(2013).Soil organic carbon sequestration potential of cropland in China.GLOBAL BIOGEOCHEMICAL CYCLES,27(3),711-722.
MLA	Qin, Zhangcai,et al."Soil organic carbon sequestration potential of cropland in China".GLOBAL BIOGEOCHEMICAL CYCLES 27.3(2013):711-722.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Soil_organic_carbon_（751KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文