Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China

doi:10.1007/s12665-015-4801-0

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China
	Li, X.1; Wang, Z.3; Zhang, F.1; Li, C.2
刊名	ENVIRONMENTAL EARTH SCIENCES
	2016
卷号	75 期号:1
关键词	Soil Organic Carbon Crop Management Dndc
DOI	10.1007/s12665-015-4801-0
文献子类	Article
英文摘要	Human activities and climate change have substantial effects on soil ecosystems. The historical variations in soil organic carbon (SOC) in Northwest China were investigated in this paper. Using an agro-ecosystems database, a process-based model, Denitrification-Decomposition (DNDC), was used to support a regional SOC simulation. Over the 1980s and 1990s, the SOC storage (0-50 cm) reduced slightly from 1.25 PgC (pentagrams of carbon, 1 PgC = 10(15) gC) and stabilized at 1.23 PgC. SOC significantly differed in Northwest China farmland both temporally and spatially. Climatic variability magnified the response of the spatially heterogeneous region to climate and greatly influenced the vegetation and soil. The SOC increase appeared in areas with a mild and humid climate in the east, including Shaanxi, Gansu, Ningxia and south Xinjiang. Management practices greatly affect SOC dynamics through straw C input, increased 46.31 % C budget and 20.52 % total SOC (TSOC) through 60 % crop residue incorporation. Reducing human disturbance to the surface soil through conservative tillage and improving soil fertility through reasonable nutrient input and water-use efficiency have important implications for C sequestration, emission reduction and soil productivity improvement in arid or semiarid agricultural farmland regions.
WOS关键词	GLOBAL CLIMATE-CHANGE ; ORGANIC-MATTER ; MODELING IMPACTS ; NET FLUX ; SEQUESTRATION ; FERTILITY ; PHENOLOGY ; FARMLAND ; SYSTEMS ; 1980S
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
WOS记录号	WOS:000370239800065
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5834]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
作者单位	1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Environm Sci & Technol, Xian 710049, Peoples R China 2.Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA 3.Chinese Acad Sci, IEE, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
推荐引用方式 GB/T 7714	Li, X.,Wang, Z.,Zhang, F.,et al. Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(1).
APA	Li, X.,Wang, Z.,Zhang, F.,&Li, C..(2016).Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China.ENVIRONMENTAL EARTH SCIENCES,75(1).
MLA	Li, X.,et al."Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China".ENVIRONMENTAL EARTH SCIENCES 75.1(2016).