不同作物种植条件下微咸水灌溉的土壤环境效应试验研究

Effect of Light-saline Water Irrigation on Soil Environment under Different Crop Planting Condition

在田间试验条件下,采用正常灌溉定额和淋洗灌溉定额2种灌溉水平,对小麦、葵花、玉米3种作物进行了不同灌溉水浓度处理的灌溉试验,对3种作物种植条件下土壤水盐运移规律进行了研究。研究发现灌溉水浓度达到某一临界值时,盐分将在土壤剖面一定深度的土层内聚集明显增大。且不同作物的临界灌水浓度值不同。

Field irrigation experiment of different salt concentration is conducted for wheat, sunflower and maize with normal quota and leaching quota in this paper. The soil water and salt transport were studied under 3 crop planting condition. It is found that the soil salinity increases obviously in the definite deep zone when the salt concentration of irrigation water reaches the critical value. Different crops have the different critical concentrations of irrigation water.