Spatial Variation of Soil Salinity in the Chanan Irrigated Area in the Ili River Valley
The study area is located in the Chanan Irrigated Area in the Ili River Valley,Xinjiang,China.EM38 conductivity meter was combined with laboratory analysis to get the values of soil EC and soil salt content at depths of 0-30 cm,30-60 cm and 60-100 cm.Simple statistical classification was conducted,and the semi-variogram analysis on soil salinity was carried out with geostatistics.The spatial variation of soil salinity was aimed at so as to provide the theoretical support for soil salt control and soil desalinization in the similar irrigated areas.Preliminary study indicated that the variation coefficient of soil EC in the study area was 1.31,and the variation coefficients of soil salt content at three depths mentioned above were 1.31,1.10 and 1.49 respectively.The proportion of nonsalinized soil at each layer was high,but the influence of soil salinization could not be ignored.Salinized soil was mainly distributed in the northwest and southwest regions,the proportions of salinized soil at the three depths were 25.37％,21.79％ and 12.11％ respectively,and the trend of soil salinization in the study area was obvious.Spatially,soil EC and soil salt content were holistically decreased from the northwest to the southeast of the irrigated area.It was found that there were the high spatial correlations among the factors related to soil salt content,and the spatial variation pattern was closely related to the structural factors.
irrigated areasoil salinityspatial variationgeostatistical analysissoil electrolytic conductivityIli River Valley
国家科技期刊平台
NSTL
万方数据
维普
