干旱区生态环境知识资源中心(Arid): Carbon and Nitrogen Sourcing in High Elevation Landscapes of Mustang in Central Nepal

Arid

DOI	10.3390/su13116171
	Carbon and Nitrogen Sourcing in High Elevation Landscapes of Mustang in Central Nepal
	Ojha, Roshan Babu; Manandhar, Sujata; Neupane, Avishesh; Panday, Dinesh; Tiwari, Achyut
通讯作者	Panday, D (corresponding author), Univ Tennessee, Dept Biosyst Engn & Soil Sci, Knoxville, TN 37996 USA.
来源期刊	SUSTAINABILITY
EISSN	2071-1050
出版年	2021
卷号	13 期号:11
英文摘要	Mustang valley in the central Himalaya of Nepal is a unique landscape formed by massive soil mass during a glacial period, which is attributed to a mix of vegetations and long agricultural history. Soil nutrients and their sourcing is highly important to understand the vegetation assemblage and land productivity in this arid zone. Twenty soil samples (from 0 to 20 cm depth) were collected from three landscape positions in Mustang district: valley, ridge, and midslope. We explored nutrient sourcing using natural abundance carbon (delta C-13) and nitrogen isotope (delta N-15) employing isotope ratio mass spectrophotometry. The results showed that the total soil carbon (TC) and total nitrogen (TN) ranged from 0.3 to 10.5% and 0.3 to 0.7%, respectively. Similarly, the CN ratio ranged from 0.75 to 15.6, whereas soil pH ranged from 6.5 to 7.5. Valley soil showed higher values of TN, CN, and soil pH than the ridge and midslope soils. The valleys had more positive delta N-15 signatures than ridge and midslope, which indicates higher inorganic and organic N fertilizer inputs in the valley bottom than in the midslope and ridge. This suggests that a higher nutrient content in the valley bottom likely results from agro-inputs management and the transport of nutrients from the ridge and midslope. Soil pH and CN ratio were a non-limiting factor of nutrient availability in the study regions. These findings are crucial in understanding the nutrient dynamics and management in relation to vegetation and agricultural farming in this unique topography of the Trans-Himalayan zone of Mustang in central Nepal.
英文关键词	carbon isotopic signature Mustang natural abundance nitrogen nutrient sourcing
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000660736900001
WOS关键词	ORGANIC-MATTER ; CLIMATE-CHANGE ; ISOTOPIC COMPOSITION ; SOIL CARBON ; EROSION ; DELTA-N-15 ; NUTRIENTS ; DYNAMICS ; PATTERNS ; DECOMPOSITION
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351859
作者单位	[Ojha, Roshan Babu] Nepal Agr Res Council, Natl Soil Sci Res Ctr, Khumaltar 44700, Lalitpur, Nepal; [Manandhar, Sujata] Ctr Res Environm Energy & Water, Kathmandu 25563, Nepal; [Neupane, Avishesh; Panday, Dinesh] Univ Tennessee, Dept Biosyst Engn & Soil Sci, Knoxville, TN 37996 USA; [Tiwari, Achyut] Tribhuvan Univ, Cent Dept Bot, Kathmandu 44600, Nepal
推荐引用方式 GB/T 7714	Ojha, Roshan Babu,Manandhar, Sujata,Neupane, Avishesh,et al. Carbon and Nitrogen Sourcing in High Elevation Landscapes of Mustang in Central Nepal[J],2021,13(11).
APA	Ojha, Roshan Babu,Manandhar, Sujata,Neupane, Avishesh,Panday, Dinesh,&Tiwari, Achyut.(2021).Carbon and Nitrogen Sourcing in High Elevation Landscapes of Mustang in Central Nepal.SUSTAINABILITY,13(11).
MLA	Ojha, Roshan Babu,et al."Carbon and Nitrogen Sourcing in High Elevation Landscapes of Mustang in Central Nepal".SUSTAINABILITY 13.11(2021).