滴灌结合脱硫石膏改良盐碱土过程中水盐运移规律

Transport of Soil Salt and Water in the Process of Improving Alkaline Soil with Drip Irrigation and Desulfurized Gypsum

通过室内试验，研究了滴灌结合脱硫石膏改良盐碱土过程中土壤水盐运移规律。结果表明，滴灌下限为100％FC时，有利于0～20cm土层全盐和碱化离子的淋洗，加快盐碱土改良的过程。但滴灌淋洗改良的范围有限，碱化离子在土层底部集聚，造成土壤底部盐碱化。每次生育期滴灌过后应配合漫灌。

Indoor experiment was conducted to study the transport of soil salt and water in the process of improving alkaline soil with drip irrigation and desulfurized gypsum. The results showed that in condition of evaporation and alkalized soil of ESP 22.55, the treatment of the lower limit at 100% FC could be benefical for leaching soil salt and improving the alkaline soil. But the leaching ability under drip irrigation was limited and soil salts clustered in the bottom of soil, which could salinize the soil in the bottom. A flood irrigation should be carried out after drip irrigation.