The effects of N and P additions on microbial N transformations and biomass on saline-alkaline grassland of Loess Plateau of Northern China

doi:10.1016/j.geoderma.2013.08.003

	The effects of N and P additions on microbial N transformations and biomass on saline-alkaline grassland of Loess Plateau of Northern China
	Wang Changhui ; Zhu Feng 1; Zhao Xiang 1; Dong Kuanhu 1
	2014
发表期刊	GEODERMA
ISSN	0016-7061
卷号	213 页码:419-425
摘要	Microbial nutrient transformation plays an important role in regulating nitrogen (N) and phosphorus (P) cycling in terrestrial ecosystems. Soil N and P contents also control microbial nutrient transformations. However, there is still dispute on how N and P additions affect microbial activity and N transformations. A field experiment was conducted to examine the effects of N and P on microbial N transformations and biomass in saline-alkaline grassland in Loess Plateau of northern China during growing season in 2009. N was added at a rate of 10 g N m(-2) y(-1) in the form of NH4NO3. P was added at a rate of 5 g P m(-2) y(-1) in the form of P2O5-. We measured the in situ net ammonification rate (R-amm), and nitrification rate (R-nit) once a month from May to October; we also measured potential soil microbial biomass carbon (MBC), nitrogen (MBN), and potential microbial respiration (MR) once a month in laboratory. Results: During the whole growing seasons, P addition significantly stimulated soil inorganic N pool, soil extractable C, soil extractable N pool, R-min, and the metabolic quotient (qCO(2)) from the estimates of microbial respiration and microbial biomass carbon, and there was no effect on peak aboveground biomass, MBC, MBN and MR during the whole growing seasons in 2009. N addition significantly increased peak aboveground biomass, inorganic N pool, R-min, MBN, MR, and qCO(2), decreased soil extractable C and the ratio of MBC/MBN, and there was no effect on soil extractable N and MBC during the growing season in 2009. P addition increased the soil net N mineralization rate and N addition not only increased the soil net N mineralization rate but also increased microbial biomass N. We observed that P induced a decreased soil inorganic N pool, but N addition directly increased soil inorganic N pool, how to balance the quantity of N and P additions in agriculture system is an important technique in agriculture harvest in the future in Loess Plateau of Northern China. (C) 2013 Elsevier B.V. All rights reserved.
关键词	Microbial biomass Microbial respiration N mineralization Nitrification Saline-alkaline soil
学科领域	Soil Science
DOI	10.1016/j.geoderma.2013.08.003
收录类别	SCI
语种	英语
WOS关键词	PHOSPHORUS LIMITATION ; RESPIRATION RATE ; SOIL QUALITY ; ELEVATED CO2 ; ATP CONTENT ; NITROGEN ; RESPONSES ; FOREST ; FERTILIZATION ; DYNAMICS
WOS研究方向	Agriculture
WOS记录号	WOS:000329594800045
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-6259
资助机构	National Natural Science Foundation of China (NSFC) [31170455] ; Ministry of Science and Technology [2007BAD56B01] ; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences
作者邮箱	wangch@ibcas.ac.cn
作品OA属性	hybrid
引用统计	被引频次：34[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/2S10CLM1/27209
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 2.Shanxi Agr Univ, Taigu 030801, Peoples R China
推荐引用方式 GB/T 7714	Wang Changhui,Zhu Feng,Zhao Xiang,et al. The effects of N and P additions on microbial N transformations and biomass on saline-alkaline grassland of Loess Plateau of Northern China[J]. GEODERMA,2014,213:419-425.
APA	Wang Changhui,Zhu Feng,Zhao Xiang,&Dong Kuanhu.(2014).The effects of N and P additions on microbial N transformations and biomass on saline-alkaline grassland of Loess Plateau of Northern China.GEODERMA,213,419-425.
MLA	Wang Changhui,et al."The effects of N and P additions on microbial N transformations and biomass on saline-alkaline grassland of Loess Plateau of Northern China".GEODERMA 213(2014):419-425.

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