Assessment of soil salinisation in the Ejina Oasis located in the lower reaches of Heihe River, Northwestern China

Zhao, Yu and Feng, Qi and Lu, Aigang and Deo, Ravinesh C. (2018) Assessment of soil salinisation in the Ejina Oasis located in the lower reaches of Heihe River, Northwestern China. Chemistry and Ecology. ISSN 0275-7540

Abstract

Recognition of the spatial-temporal distribution characteristics of soil salinity has become an important basis for the formulation of strategies required in the utilisation and sustainable development of soil resources in arid and semi-arid area. In this paper, based on vegetation cover dataset during 1998–2015 in Ejina region combined with the collected soil salinity data, geostatistical methods were used to explore the temporal and spatial dynamic characteristics of soil salinity and its impact on vegetation in the study area. The results showed significant differences in soil salinisation characteristics with a large variability in the soil salinity among the different soil depths, with a variation coefficient ranging from about 0.97–1.47. Soils are represented by a continuous variation, both in space and time. Soil salinity showed an obvious spatial autocorrelation, with a plaque type distribution. The areas of the salinised soil found for the years 2003, 2011 and 2015 were approximately 18,565, 23,206 and 17,721 km2, respectively. From the relationships deduced between the normalised difference vegetation index (NDVI) and soil moisture and salt content in different soil depths, the present study ascertains that the soil moisture content is the most important limiting factor of vegetation growth in Ejina Oasis.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: This study was supported by Chinese Academy of Sciences Presidential Fellowship 2016 awarded to Dr Ravinesh Deo. Published online 6 December 2018. Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Applied Climate Sciences
Date Deposited: 10 Dec 2018 04:39
Last Modified: 13 Jun 2019 05:06
Uncontrolled Keywords: soil salinity, spatial-temporal distribution, geostatistics, vegetation index, Ejina Oasis
Fields of Research : 05 Environmental Sciences > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970105 Expanding Knowledge in the Environmental Sciences
Identification Number or DOI: 10.1080/02757540.2018.1554060
URI: http://eprints.usq.edu.au/id/eprint/35219

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