Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China
Zhang, F.1; Li, C.2; Wang, Z.3; Li, X.1
2016
发表期刊ENVIRONMENTAL EARTH SCIENCES
卷号75期号:1
文章类型Article
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.
关键词Soil Organic Carbon Crop Management Dndc
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1007/s12665-015-4801-0
关键词[WOS]GLOBAL CLIMATE-CHANGE ; ORGANIC-MATTER ; MODELING IMPACTS ; NET FLUX ; SEQUESTRATION ; FERTILITY ; PHENOLOGY ; FARMLAND ; SYSTEMS ; 1980S
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号WOS:000370239800065
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5834
专题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
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Zhang, F.,Li, C.,Wang, Z.,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 Zhang, F.,Li, C.,Wang, Z.,&Li, X..(2016).Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China.ENVIRONMENTAL EARTH SCIENCES,75(1).
MLA Zhang, F.,et al."Long-term effects of management history on carbon dynamics in agricultural soils in Northwest China".ENVIRONMENTAL EARTH SCIENCES 75.1(2016).
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