Nitrogen addition and mowing affect microbial nitrogen transformations in a C4 grassland in northern China

doi:10.1111/ejss.12231

	Nitrogen addition and mowing affect microbial nitrogen transformations in a C4 grassland in northern China
	Wang, C.; Butterbach-Bahl, K.; He, N.; Wang, Q.; Xing, X.; Han, X.
	2015
发表期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
卷号	66 期号:3 页码:485-495
摘要	Microbial nitrogen (N) transformations play a key role in regulating N cycling in grassland ecosystems. However, there is still little information on how management of semi-arid grassland such as mowing and/or N fertilizer application affects microbial activity and N transformations. In a field experiment in northern China, N was added at a rate of 10 g N m(-2) year(-1) as NH4NO3 to mown and unmown plots (4 x 4 m(2)) and in situ rates of net ammonification (R-amm), nitrification (R-nit) and mineralization (R-min) were followed at monthly intervals for the vegetation growth periods in the years 2006-2009. In addition, we also measured soil microbial biomass carbon (MBC) and nitrogen (MBN), microbial respiration (MR) and peak above-ground biomass in August of each measurement year. Driven by the pronounced inter-annual variability of rainfall, all the properties investigated varied markedly across years. Nevertheless, we were able to demonstrate that over the 4 years N addition significantly stimulated R-nit, R-min and MBN, on average, by 288, 149 and 11.6%, respectively. However, N addition decreased MBC significantly as well as the ratio of MBC:MBN by, on average, 10 and 23%, respectively, whereas an effect of N addition on MR could not be demonstrated. Mowing decreased MBN, MR and qCO(2) significantly by 9, 28 and 24%, respectively, but no effects were found on microbial net N transformation rates and MBC. N addition and mowing interactively affected R-amm and R-min, and MBN, MBC:MBN. In summary, our results indicate a positive effect of N addition but a negative effect of mowing on microbial N transformation in this C4 grassland in northern China.
学科领域	Soil Science
DOI	10.1111/ejss.12231
收录类别	SCI
语种	英语
WOS关键词	SUB-ARCTIC MEADOW ; TERRESTRIAL ECOSYSTEMS ; N-MINERALIZATION ; BIOMASS REMOVAL ; SOIL ; RESPONSES ; FERTILIZATION ; RESPIRATION ; LIMITATION ; FOREST
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000355004000010
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2389
资助机构	National Natural Science Foundation of China (NSFC) [31170455/30970495] ; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences
作者邮箱	xghan@ibcas.ac.cn
作品OA属性	Green Published
引用统计	被引频次：18[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/2S10CLM1/25819
专题	植被与环境变化国家重点实验室
作者单位	1.[Wang, C. 2.Wang, Q. 3.Xing, X. 4.Han, X.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Butterbach-Bahl, K.] Inst Meteorol & Climate Res, Atmospher Environm Res, D-82467 Garmisch Partenkirchen, Germany 6.[Butterbach-Bahl, K.] Int Livestock Res Inst, Nairobi 30709, Kenya 7.[He, N.] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Net Work Observat & Modeling, Beijing 100101, Peoples R China 8.[Han, X.] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, C.,Butterbach-Bahl, K.,He, N.,et al. Nitrogen addition and mowing affect microbial nitrogen transformations in a C4 grassland in northern China[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2015,66(3):485-495.
APA	Wang, C.,Butterbach-Bahl, K.,He, N.,Wang, Q.,Xing, X.,&Han, X..(2015).Nitrogen addition and mowing affect microbial nitrogen transformations in a C4 grassland in northern China.EUROPEAN JOURNAL OF SOIL SCIENCE,66(3),485-495.
MLA	Wang, C.,et al."Nitrogen addition and mowing affect microbial nitrogen transformations in a C4 grassland in northern China".EUROPEAN JOURNAL OF SOIL SCIENCE 66.3(2015):485-495.

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