干旱区生态环境知识资源中心(Arid): Pathways of nitrogen loss and optimized nitrogen management for a rice cropping system in arid irrigation region, northwest China

Arid

DOI	10.1016/j.jenvman.2020.110702
	Pathways of nitrogen loss and optimized nitrogen management for a rice cropping system in arid irrigation region, northwest China
	Zhan Xiaoying; Zhang Qingwen; Zhang Hui; Hussain, Hafiz Athar; Shaaban, Muhammad; Yang Zhengli
通讯作者	Zhang, QW
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2020
卷号	268
英文摘要	The reactive nitrogen (N) loss of the rice cropping system in the arid region shows a different pattern from that of subtropical humid region due to different climate types and crop management. However, little attention has been paid to this region. To fill this knowledge gap, a two-year (2009-2010) field observation was conducted in the Ningxia irrigation region, northwest China, to explore the major pathway of N loss following local farmers' optimal practice. Further, we determined the site-specific emission factors of ammonia and nitrous oxide, rate of surface runoff and subsurface (leaching and seepage) to improve the inventory resolution of arid irrigation region. Results showed that ammonia volatilization (45%-49% of total N loss), leaching and seepage (30%-33% of total N loss) were proved to be the primary factors of N loss in rice paddy fields. The emission factor of ammonia (21%) and N leaching rate (7.5%) following farmers' practice were 2.1 and 5.4 times higher than the country-specific default value in China. The country-specific N runoff rate and emission factor of N2O could be directly adopted in this region. A 20% reduction of N fertilizer to farmers' practice (300 kg N ha(-1)) alongside the application of organic fertilizer (30% N in synthetic fertilizer was substituted by pig manure) were considered to be the optimal N rate in this region. Our study can narrow the gap between researches on N loss in arid regions and subtropical humid regions. Meanwhile, the results can provide specific advice on N loss mitigation for policy makers in arid irrigation regions.
英文关键词	Nitrogen use efficiency Nitrogen loss Nitrogen budget Emission factors Arid irrigation region
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000538936000042
WOS关键词	GREENHOUSE-GAS EMISSIONS ; AMMONIA VOLATILIZATION ; PADDY FIELDS ; FERTILIZERS ; SURFACE ; RUNOFF ; FLUXES ; YIELD ; WATER ; OXIDE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324676
作者单位	[Zhan Xiaoying; Zhang Qingwen; Hussain, Hafiz Athar; Yang Zhengli] Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Agr Clean Watershed Res Grp, Beijing 100081, Peoples R China; [Zhan Xiaoying] Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China; [Zhan Xiaoying] Peking Univ, Minist Educ, Lab Earth Surface Proc, Beijing 100871, Peoples R China; [Zhang Hui] Ningxia Vocat & Tech Coll, Yinchuan 750002, Ningxia, Peoples R China; [Shaaban, Muhammad] Bahauddin Zakariya Univ, Fac Agr Sci & Technol, Dept Soil Sci, Multan, Pakistan
推荐引用方式 GB/T 7714	Zhan Xiaoying,Zhang Qingwen,Zhang Hui,et al. Pathways of nitrogen loss and optimized nitrogen management for a rice cropping system in arid irrigation region, northwest China[J]. 北京大学,2020,268.
APA	Zhan Xiaoying,Zhang Qingwen,Zhang Hui,Hussain, Hafiz Athar,Shaaban, Muhammad,&Yang Zhengli.(2020).Pathways of nitrogen loss and optimized nitrogen management for a rice cropping system in arid irrigation region, northwest China.JOURNAL OF ENVIRONMENTAL MANAGEMENT,268.
MLA	Zhan Xiaoying,et al."Pathways of nitrogen loss and optimized nitrogen management for a rice cropping system in arid irrigation region, northwest China".JOURNAL OF ENVIRONMENTAL MANAGEMENT 268(2020).