| Soil water was the carry body of salt moving, under the condition of evaporation, the groundwater will be produced certain effect on soil salinization. In this paper using the incandescent lamp (275 W) to simulate the stable evaporation and soil column to simulate 50 cm ground water level, set up four repeating groups, in the test the soil salt and temperature sensors will be collected the data by each hour interval, to measure the soil moisture and salt content in the soil column of 5～50 cm and observe the precipitated salt in the soil surface layer. The results have shown that: Under the condition of evaporation and salt accumulated process, the soil water and salt content at the 30 cm depth from the surface were appeared the peak value in the evaporation process about 3 days. The constant value of soil moisture at the 30 cm was slightly lower the constant value at the 50 cm, but the constant value of salt content was close to constant value of moisture content at 50 cm. The soil moisture and salt content at the 10 cm were occurred the peak values in evaporation process about 7 days, and then soil moisture content was gradually reduced to a constant value. It was explained that the soil body below 30 cm was played as a channel function for salt transfer. After the evaporation in the soil column over, has formed the distribution character of “shallow collection and surface accumulation”. The content of K+, Na+ and Mg2+ have shown a gradually decrease from down to up by the longitudinal profile analysis of 50～25 cm and gradually increasing trend from 25～0 cm. Also these three ions total produced minimal values at 25 cm just as 1/2 of the soil column. Except the accumulated salt ions at the soil surface, the CO32-, SO42- have no any big fluctuation in the evaporation process. After the evaporation over, four kinds of anion, except the HCO3- content was larger than the initial value, other three ions were less than the initial values. |