JOURNAL OF NATURAL RESOURCES ›› 2017, Vol. 32 ›› Issue (9): 1542-1553.doi: 10.11849/zrzyxb.20160801

• Resource Evaluation • Previous Articles     Next Articles

Spatio-temporal Variation of Soil Salinity in Wastelands inside and outside of Oasis in Manas River Watershed in the Context of Dripping Irrigation

LÜ Na-na1, 2, LUO Ge-ping1, DING Jian-li2, LI Jian-jun1, LIU Li-juan1   

  1. 1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. College of Resources and Environmental Sciences, Xinjiang University, Urumqi 830046, China
  • Received:2016-07-25 Revised:2016-10-27 Online:2017-09-20 Published:2017-09-20
  • Supported by:
    Natoinal Natural Science Foundation of China, No.U1303382, 41501205 and 41671108

Abstract: Studies on soil salinization of inland river watershed in arid area have focused on the cultivated land in oases, but the studies on the salinization of wastelands inside and outside of an oasis are poor. We employed GIS technology and mathematical statistics to investigate the general spatial and temporal variation of soil salinity at the depth of 0-30, 30-60, 60-100 cm of wastelands inside and outside of the south, middle and north parts of an oasis in the Manas River watershed under the background of dripping irrigation between 2006 and 2012. The contents of soil salinity, anions and cations except for Na+ and K+ at the soil depths of 100 cm in wastelands inside and outside of oasis in 2012 were all less than those in 2006. The dominant salt type transformed from Na2SO4 to NaCl during 2006-2012. The contents of soil salinity, anions and cations except Na+ and K+ did not show significant spatial differences in 2006. Whereas, the contents of soil salinity and ions except for Na+, K+ and CO32- in 2012 showed significant spatial difference, being higher in the middle part than in the south and north parts of the oasis. The utilization of groundwater and the pattern of irrigation system were the dominant factors resulting in spatial and temporal variation of soil salinity in the wastelands within and outside the oasis. The analysis of spatial and temporal variation of soil salinity in the wastelands inside and outside of oasis in the Manas River watershed would enrich the understanding of salinization and contribute to the reasonable development and utilization of land and water resources in oasis of arid watershed.

Key words: dripping irrigation, Manas River watershed, soil salinity, wastelands inside and outside oasis

CLC Number: 

  • S275.6