The effects of a 9-year nitrogen and water addition on soil aggregate phosphorus and sulfur availability in a semi-arid grassland

doi:10.1016/j.ecolind.2015.10.033

	The effects of a 9-year nitrogen and water addition on soil aggregate phosphorus and sulfur availability in a semi-arid grassland
	Wang, Ruzhen 1; Creamer, Courtney A.2; Wang, Xue 1,3; He, Peng 1,3; Xu, Zhuwen 1; Jiang, Yong 1
刊名	ECOLOGICAL INDICATORS
	2016-02-01
卷号	61 页码:806-814
关键词	Nitrogen Deposition Precipitation Increment Soil Extracellular Enzymes Soil Phosphorus And Sulfur Global Change
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2015.10.033
英文摘要	Previous studies have demonstrated that higher nitrogen (N) and water availability affect both above-and below-ground communities, soil carbon and N pools, and microbial activity in semi-arid grasslands of Inner Mongolia. However, how soil phosphorus (P) and sulfur (S) pools, and related soil enzyme activities (as indicators of P and S cycles) respond to long-term N and water addition has still remained unclear. Since 2005, a field experiment with urea and water amendments has been conducted to examine their effects on total and available P and S concentrations and alkaline phosphomonoesterase (PME) and aryl-sulfatase (ArS) activities in three soil aggregate fractions: large macroaggregates (>2 mm), small macroaggregates (0.25-2 mm), and microaggregates (<0.25 mm) in an Inner Mongolia semi-arid grassland. Normalized to aggregate mass, microaggregates retained the highest total P and S concentrations. Both N and water additions increased the available P (by up to 84.5%) and the available S (by up to 150%) in the soil aggregate fractions. Soil acidification, as a result of the N addition, decreased both alkaline PME and ArS activities by up to 62.9% and 39.6%, respectively, while the water addition increased their activities. Our observations revealed that soil acidification (under the N addition) and elevated enzyme activity (under the water addition) played important roles in the levels of soil available P and S. The depression of P- and S-acquiring enzymes with soil acidification may decrease P and S availability, potentially impacting ecosystem processes and limiting the restoration of these grassland systems. The water addition was shown to be a more effective practice than the urea amendment for improving soil structure, supplying available P and S, and maintaining the sustainability of this semi-arid grassland. (c) 2015 Elsevier Ltd. All rights reserved.
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000367411200062
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122365]
专题	中国科学院沈阳应用生态研究所
通讯作者	Jiang, Yong
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China 2.CSIRO Sustainable Agr Flagship, Glen Osmond, SA 5064, Australia 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ruzhen,Creamer, Courtney A.,Wang, Xue,et al. The effects of a 9-year nitrogen and water addition on soil aggregate phosphorus and sulfur availability in a semi-arid grassland[J]. ECOLOGICAL INDICATORS,2016,61:806-814.
APA	Wang, Ruzhen,Creamer, Courtney A.,Wang, Xue,He, Peng,Xu, Zhuwen,&Jiang, Yong.(2016).The effects of a 9-year nitrogen and water addition on soil aggregate phosphorus and sulfur availability in a semi-arid grassland.ECOLOGICAL INDICATORS,61,806-814.
MLA	Wang, Ruzhen,et al."The effects of a 9-year nitrogen and water addition on soil aggregate phosphorus and sulfur availability in a semi-arid grassland".ECOLOGICAL INDICATORS 61(2016):806-814.