Mowing and topography effects on microorganisms and nitrogen transformation processes responsible for nitrous oxide emissions in semi-arid grassland of Inner Mongolia

doi:10.1007/s11368-017-1819-9

	Mowing and topography effects on microorganisms and nitrogen transformation processes responsible for nitrous oxide emissions in semi-arid grassland of Inner Mongolia
	Zhong, Lei 1; Li, Frank Yonghong 2; Wang, Yanfen 1; Zhou, Xiaoqi 3; Zhou, Shutong 1; Gong, Xiaolei 4; Bai, Yongfei5
	2018
发表期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
卷号	18 期号:3 页码:929-935
摘要	Few studies have been done to investigate the impact of mowing on N2O emissions and the abundance of functional microbial genes, especially in sloping landscapes. This study aims to explore the impact of mowing on key N2O-producing processes under different topographical conditions in a semi-arid grassland. Soil samples were collected from a semiarid grassland ecosystem in Xilingol region, Inner Mongolia, where long-term management practices including non-mowing and mowing in flat and sloping blocks were conducted. We then determined (1) soil moisture, total carbon (TC) and nitrogen (TN), and mineral N (NH4 (+)-N and NO3 (-)-N) content; (2) the potential N2O emission from nitrification (N-N2O) and from denitrification (D-N2O) and potential N-2 emission (D-N2); and (3) the gene abundance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB), the narG (nitrate reductase) gene, and nosZ (nitrous oxide reductase) gene. Soil moisture and potential N2O emission from nitrification and denitrification were significantly lower in sloping than in flat conditions, whereas the TC, TN, NH4 (+)-N, NO3 (-)-N content, gene abundance of AOA, AOB, narG, and nosZ showed no difference between flat and sloping conditions. Mowing significantly decreased the gene abundance of AOA, AOB, narG in both flat and sloping areas, and significantly decreased potential N2O emissions, especially in sloping areas. The potential N2O emission was significantly lower on sloping than flat grassland. Mowing significantly decreased the potential N2O emissions, especially on sloping grassland. Our results suggest that topographical conditions should be incorporated into methods for estimating N2O emission and land management practices in semiarid grassland.
关键词	Microbial functional groups Mowing N2O emission potential Slope
学科领域	Environmental Sciences ; Soil Science
DOI	10.1007/s11368-017-1819-9
收录类别	SCI
语种	英语
WOS关键词	AMMONIA-OXIDIZING ARCHAEA ; INCREASING RATES ; SOIL ; COMMUNITIES ; MANAGEMENT ; DENITRIFICATION ; SHEEP ; NITRIFICATION ; FERTILIZER ; NITRIFIER
WOS记录号	WOS:000426070100026
出版者	SPRINGER HEIDELBERG
文献子类	Article
出版地	HEIDELBERG
EISSN	1614-7480
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41601245] ; Ministry of Science and Technology of ChinaMinistry of Science and Technology, China [2015BAC02B04]
作者邮箱	Lei_zhong10b@163.com
引用统计	被引频次：8[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/2S10CLM1/20413
专题	植被与环境变化国家重点实验室
作者单位	1.Tianjin Univ, China Australia Ctr Sustainable Urban Dev, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Inner Mongolia Univ, Sch Ecol & Environm, Key Lab Grassland Ecol, Hohhot 010021, Peoples R China 4.East China Normal Univ, Sch Ecol & Environm Sci, Ctr Global Change & Ecol Forecasting, Tiantong Natl Forest Ecosyst Observat & Res Stn, Shanghai 200241, Peoples R China 5.Tianjin Univ, Sch Architecture, Tianjin 300072, Peoples R China 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Lei,Li, Frank Yonghong,Wang, Yanfen,et al. Mowing and topography effects on microorganisms and nitrogen transformation processes responsible for nitrous oxide emissions in semi-arid grassland of Inner Mongolia[J]. JOURNAL OF SOILS AND SEDIMENTS,2018,18(3):929-935.
APA	Zhong, Lei.,Li, Frank Yonghong.,Wang, Yanfen.,Zhou, Xiaoqi.,Zhou, Shutong.,...&Bai, Yongfei.(2018).Mowing and topography effects on microorganisms and nitrogen transformation processes responsible for nitrous oxide emissions in semi-arid grassland of Inner Mongolia.JOURNAL OF SOILS AND SEDIMENTS,18(3),929-935.
MLA	Zhong, Lei,et al."Mowing and topography effects on microorganisms and nitrogen transformation processes responsible for nitrous oxide emissions in semi-arid grassland of Inner Mongolia".JOURNAL OF SOILS AND SEDIMENTS 18.3(2018):929-935.

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