干旱区生态环境知识资源中心(Arid): Modeling impacts of mulching and climate change on crop production and N2O emission in the Loess Plateau of China

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DOI	10.1016/j.agrformet.2019.01.002
	Modeling impacts of mulching and climate change on crop production and N2O emission in the Loess Plateau of China
	Chen, Haixin 1,2; Li, Linchao 2; Luo, Xiaoqi 2; Li, Yi 2; Liu, De Li 3,4,5; Zhao, Ying 6; Feng, Hao 1,2; Deng, Jia 7
通讯作者	Feng, Hao ; Deng, Jia
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2019
卷号	268 页码:86-97
英文摘要	Covering soils using mulch can increase crop productivity in dryland agriculture. However, there remains large uncertainty regarding impacts of mulching on nitrous oxide (N2O) emissions, especially under climate change (increases in air temperature and atmospheric CO2 concentration and changes in precipitation). In this study, we applied a biogeochemical model, DeNitrification-DeComposition (DNDC), to predict impacts of different mulching practices on wheat (Triticum aestivum L.) and maize (Zea mays L.) yields and N2O emissions under future climate scenarios in the South Loess Plateau of China. When tested against the observed crop yields and N(2)O( )emissions under no-mulching (NM), straw mulching (SM), and plastic film mulching (PM), DNDC successfully simulated crop yields and annual N2O emissions under all treatments. Simulations and observations both suggested that applying SM or PM increased crop yields and N2O emissions in comparison with NM. Sensitivity analyses of crop yields and N2O emissions indicated that the crop yields were primarily influenced by precipitation and N2O emissions were sensitive to changes in air temperature, precipitation, soil organic carbon, and nitrogen application rate. Application of SM or PM reduced the sensitivity of the crop yield and N2O emissions to precipitation change. Compared with historical climate conditions, future climate from 2017 to 2100 significantly increased crop yields except during the 2090s for NM or SM and during the 2070s to 2090s for PM under the high emission scenario (RCP8.5), while N2O emissions were increased under all treatments. The positive impacts of PM on crop yields could be reduced under the RCP8.5 scenario. The DNDC predictions suggest that straw mulching might be an optimum mulching method to improve crop productivity and mitigate increasing N2O under future climate conditions in semi-arid to sub-humid areas such as the South Loess Plateau of China.
英文关键词	Crop yield N2O emission Mulching Climate change Biogeochemical modeling
类型	Article
语种	英语
国家	Peoples R China ; Australia ; USA
收录类别	SCI-E
WOS记录号	WOS:000460844700010
WOS关键词	NITROUS-OXIDE EMISSIONS ; WATER-USE EFFICIENCY ; GREENHOUSE-GAS EMISSIONS ; MAIZE ROTATION SYSTEM ; SOIL ORGANIC-CARBON ; WINTER-WHEAT ; FERTILIZER MANAGEMENT ; RAINFALL EVENTS ; SUMMER MAIZE ; GRAIN-YIELD
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213943
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 2.Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Yangling 712100, Shaanxi, Peoples R China; 3.Wagga Wagga Agr Inst, NSW Dept Primary Ind, Wagga Wagga, NSW 2650, Australia; 4.Univ New South Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia; 5.Univ New South Wales, ARC Ctr Excellence Climate Extremes, Sydney, NSW 2052, Australia; 6.Ludong Univ, Coll Resources & Environm Engn, Yantai 264025, Shandong, Peoples R China; 7.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA
推荐引用方式 GB/T 7714	Chen, Haixin,Li, Linchao,Luo, Xiaoqi,et al. Modeling impacts of mulching and climate change on crop production and N2O emission in the Loess Plateau of China[J]. 西北农林科技大学,2019,268:86-97.
APA	Chen, Haixin.,Li, Linchao.,Luo, Xiaoqi.,Li, Yi.,Liu, De Li.,...&Deng, Jia.(2019).Modeling impacts of mulching and climate change on crop production and N2O emission in the Loess Plateau of China.AGRICULTURAL AND FOREST METEOROLOGY,268,86-97.
MLA	Chen, Haixin,et al."Modeling impacts of mulching and climate change on crop production and N2O emission in the Loess Plateau of China".AGRICULTURAL AND FOREST METEOROLOGY 268(2019):86-97.