干旱区生态环境知识资源中心(Arid): Coupled response of soil carbon and nitrogen pools and enzyme activities to nitrogen and water addition in a semi-arid grassland of Inner Mongolia

Arid

DOI	10.1007/s11104-014-2129-2
	Coupled response of soil carbon and nitrogen pools and enzyme activities to nitrogen and water addition in a semi-arid grassland of Inner Mongolia
	Wang, Ruzhen 1,5; Filley, Timothy R.2; Xu, Zhuwen 1; Wang, Xue 1,5; Li, Mai-He 1,3; Zhang, Yuge 4; Luo, Wentao 1,5; Jiang, Yong 1
通讯作者	Jiang, Yong
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2014
卷号	381 期号:1-2 页码:323-336
英文摘要	Previous studies have demonstrated positive net primary production effects with increased nitrogen (N) and water availability in Inner Mongolian semi-arid grasslands. However, the responses of soil carbon (C) and N concentrations and soil enzyme activities as indicators of impacts of long-term N (urea) and water addition are still unclear. We tested the effect of 7 years of a N and water addition experiment on soil C, N, and specific soil-bound enzymes in a semi-arid grassland of Inner Mongolia. We determined concentrations of soil organic carbon (SOC) and soil total nitrogen (TN) in both the 0-10 and 10-20 cm soil layers. Concentrations of labile carbon (LC) and inorganic nitrogen (nitrate and ammonium), and soil pH were measured. Additionally, soil dehydrogenase (DHA), beta-glucosidase (BG) and acid and alkaline phosphomonoesterase (PME) enzyme activities were determined in the 0-10 cm soil layer. SOC concentration in the 0-10 cm soil layer showed no response to N addition or N plus water addition, but increased with water addition alone by 0.3-15.7 %. N addition significantly increased nitrate by 46.0-138.4 % and ammonium by 19.0-73.3 % in the 0-10 cm soil layer, whereas water addition did not affect them. The activities of DHA and alkaline PME enzymes, as well as soil pH, in the 0-10 cm layer decreased with N addition, however water addition alone caused these enzyme activities to increase. Unlike the surface soil (0-10 cm), the lower soil layer (10-20 cm), was responsive to N and water addition in that SOC and TN concentrations decreased with N addition and increased with water addition. The accumulation of SOC and TN in N and water addition plots may be caused by the input of plant biomass exceeding SOC decomposition. Decrease in microbial activity, derived from decreased DHA and alkaline PME activities might result from suppression effects of lower pH and decreased microbial N supply. Water availability is proved to be more important than N availability for soil C and N accumulation in this semi-arid grassland.
英文关键词	Global change Precipitation increment Microbial activity Soil organic carbon Semi-arid steppe
类型	Article
语种	英语
国家	Peoples R China ; USA ; Switzerland
收录类别	SCI-E
WOS记录号	WOS:000339345400024
WOS关键词	MICROBIAL COMMUNITY COMPOSITION ; LAND-USE ; PHOSPHATASE-ACTIVITY ; ELEVATED CO2 ; N DEPOSITION ; BIOMASS ; SEQUESTRATION ; PHOSPHORUS ; PH ; PRECIPITATION
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/184245
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China; 2.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA; 3.Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland; 4.Shenyang Univ, Coll Environm Sci, Shenyang 110044, Peoples R China; 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ruzhen,Filley, Timothy R.,Xu, Zhuwen,et al. Coupled response of soil carbon and nitrogen pools and enzyme activities to nitrogen and water addition in a semi-arid grassland of Inner Mongolia[J],2014,381(1-2):323-336.
APA	Wang, Ruzhen.,Filley, Timothy R..,Xu, Zhuwen.,Wang, Xue.,Li, Mai-He.,...&Jiang, Yong.(2014).Coupled response of soil carbon and nitrogen pools and enzyme activities to nitrogen and water addition in a semi-arid grassland of Inner Mongolia.PLANT AND SOIL,381(1-2),323-336.
MLA	Wang, Ruzhen,et al."Coupled response of soil carbon and nitrogen pools and enzyme activities to nitrogen and water addition in a semi-arid grassland of Inner Mongolia".PLANT AND SOIL 381.1-2(2014):323-336.