Abstract: This experiment was carried in a wheat field with different water treatments under sprinkling irrigation conditions. Soil samples were obtained from each point under four layers of 0~10cm, 10~20cm, 20~40cm and 40~60cm. Soil water content was measured. The classical statistics was applied to analyze the data, and the results indicated that the 10~20 cm layer was affected most by rainfall and evapotranspiration. Further more, Semivariance analysis found that the difference of spatial correlation existed among different treatments with the same layer or different layers with the same treatment, and that effect of sprinkling irrigation on spatial correlation of soil moisture existed. In addition, when comparing the same layers’ range with different treatmented, range tended to increase and water was more uniformly distributed in the soil as the irrigating amount increased. These results showed some merits in increasing water use efficient and precision agriculture.

Key words: geostatistics, soil moisture, spatial variability, sprinkle irrigation