Analysis of characteristics of soil salinization in the delta oasis of the Dina and Yangxia Rivers

Tunsagul·Yasin,Mansur·sabit,JIN Wan-gui,ZHENG Kai,WANG Yan-tao(School of Geographic Science and Tourism,Xinjiang Normal University,Urumqi,Xinjiang 830054,China)

delta oasis of Dina and Yangxia Rivers;soil;salinity characters

Soil salinization has been increasing in the delta oasis of Dina and Yangxia Rivers,and it impacts directly on local agricultural development and ecological environmental construction.In this paper,by applying statistical eigenvalue and trend analysis,soil salinization of the study area,chemical composition of salt,spatial distribution features as well as the conductivity,relationship between ions and correlations between salt ions are investigated based on field work,GPS positioning and soil sampling analysis.The results show that the study area's soil pH value is 7.46,which belongs to neutral soil.T-Distribution is shown by 0～50 cm soil salt content,0～10 cm soil salinity is the largest,while the average value is 2.10%.Each cation in soil content is Na++K+>Ca2+>Mg2+,Anion content is SO42->Cl->HCO3-,while CO32-is failed to be analyzed.Different types of land salinization have significant spatial variability,salinization of the orchard with salinity of 1.04% is the lowest,while salinization of halophytic grass land with salinity of 5.28% is the highest.The contents of Na++K+ and SO42-ions are mainly in arable land and orchard,while the contents of Cl-,SO42-and Na++K+ ions are mainly in other soil types.There is a significant correlation between total salt content and conductivity,and between total dissolve solid and soil salinity ions' quantity.