Abstract: Based on experiment data which conducted on salinity fields of Yellow river irrigation area in Inner Mongolia in August 2008,the dynamic change of soil temperature,moisture and salinity in three plots(i.e.bare land,planting fields with corn and alfalfa) were analyzed by using ANOVA and canonical correlation analysis(CCA).The results showed that the dynamic pattern of ground temperature,soil moisture and total salt of three plots was basically in order of bare land,alfalfa field and then corn field.With a more significant correlation with moisture dynamics,the soil temperature on 0-5cm was an main thermal factor to drive water and salty dynamic in tillage layer(0-30cm).Vegetation could mitigate salt amount in earth surface,and reduce the degree of soil alkalization.Owing to a lower sodium adsorption ratio(SAR) than corn planting,alfalfa planting with crop rotation was a good option for salinity fields.

Key words: Salinity fields, Salinity fields, Soil temperature, Soil salinity, Soil moisture, SAR, Hang-jin banner