干旱区生态环境知识资源中心(Arid): Gross nitrogen transformation rates in semiarid tropical soils under different salinity and vegetation conditions

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DOI	10.1002/ecs2.3034
	Gross nitrogen transformation rates in semiarid tropical soils under different salinity and vegetation conditions
	Sharma, Niharika; Kumar, Sanjeev
通讯作者	Kumar, Sanjeev
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2020
卷号	11 期号:2
英文摘要	Exacerbated inundations and saltwater intrusions due to sea-level rise can significantly alter the ecology of low-lying coastal drylands by affecting their nutrient cycling and productivity. During the present study, controls on production and consumption of nitrogen in soils of semiarid tropical climate with different levels of vegetation-salinity-moisture condition were investigated using N-15 isotope dilution experiments. For this purpose, soils were collected from five land types including two in salt flat and one each in grassland (GL), wetland (WL), and an agricultural field. Soils with no vegetation, high salinity, and high moisture (salt flats) showed significant decline in gross production of nitrogen (mineralization rate: 0.21 +/- 0.10 mg N.kg(-1).d(-1); nitrification rate: 0.27 +/- 0.17 mg N.kg(-1).d(-1)) compared to soils with vegetation, low salinity, and low moisture (GL, WL, and agricultural) (mineralization rate: 2.47 +/- 1.74 mg N.kg(-1).d(-1); nitrification rate: 1.43 +/- 1.30 mg N.kg(-1).d(-1)). Backward stepwise regression analysis of the results indicated salinity to be the most important factor controlling nitrogen transformation rates. It is likely that soils undergoing frequent seawater exposure or excessive evaporation may experience slowdown in nitrogen cycling due to salinization leading to reduced nutrient production and consumption. Due to climate change, the areal extent of coastal drylands undergoing such decline in nutrient production is likely to increase, eventually leading to loss of productivity and desertification.
英文关键词	gross nitrogen transformations moisture salinity semiarid tropical drylands vegetation
类型	Article
语种	英语
国家	India
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000533920800021
WOS关键词	SEA-LEVEL RISE ; CLIMATE-CHANGE ; MICROBIAL BIOMASS ; ORGANIC-MATTER ; CARBON ; SALT ; MINERALIZATION ; NITRIFICATION ; MOISTURE ; DYNAMICS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318503
作者单位	Phys Res Lab, Geosci Div, Ahmadabad 380009, Gujarat, India
推荐引用方式 GB/T 7714	Sharma, Niharika,Kumar, Sanjeev. Gross nitrogen transformation rates in semiarid tropical soils under different salinity and vegetation conditions[J],2020,11(2).
APA	Sharma, Niharika,&Kumar, Sanjeev.(2020).Gross nitrogen transformation rates in semiarid tropical soils under different salinity and vegetation conditions.ECOSPHERE,11(2).
MLA	Sharma, Niharika,et al."Gross nitrogen transformation rates in semiarid tropical soils under different salinity and vegetation conditions".ECOSPHERE 11.2(2020).