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对孪井灌区典型地段包气带土灌溉前后的可溶盐进行了化学分析 ,连续观测了灌溉时的土壤溶液的电导率 ,在实验室进行了不同土质的淋洗模拟试验。分析和试验结果表明 :孪井灌区地层的原始含盐量与地层岩性有关 ;灌溉洗盐作用与地层包气带结构、岩性、厚度、灌溉方式和灌水量(作物 )有关
Chemical analysis was conducted on the soluble salts before and after irrigation in the gas and soil zone in the typical well of the Luanjing Irrigation Area. The conductivity of the soil solution during irrigation was continuously observed, and the leaching experiments with different soil types were carried out in the laboratory. The analysis and test results show that the original salt content of the strata in the Luanjing irrigation area is related to the lithology of the strata. The role of salt washing in the irrigation is related to the structure of the zonal gas zone, lithology, thickness, irrigation methods and irrigation amount (crops)