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中文摘要：
通过模拟试验，研究了不问水量咸水滴灌对风沙土表层盐分的三维淋洗效果，确定了防止防护林植物盐害的淋洗水量。结果表明，成水滴灌淋洗后，在滴头的正下方形成一个以滴头垂直方向线为轴、土壤表层半径较小中间半径最大的近“钵型”的“淡化脱盐区”，土壤含水率由滴头向湿润锋逐渐降低，舍盐量则逐渐增加；成水滴灌淋洗最大深度、最大水平半径、和最大水平半径深度均与灌溉淋洗水量呈对数增长关系；防止2年生沙拐枣盐害的滴灌淋洗水量约为37．56L。咸水滴灌洗盐可防治盐害。
英文摘要：
Simulating experiment was carried out to study three-dimensional leaching effect of different saline water mounts on soil salt of eaolian sandy soil and determine irrigation amount of preventing salt-injury to shelterbelt plants. The results showed that after drip-irrigation with saline water, there were desalted zones that surface radius was smaller and intermediate radius was bigger under drip emitter. In the zones, soil water content decreased and soil salt content increased gradually from the drip emitter to wetting front. The largest leaching depth, maximum horizontal radius and the depth of the maximum horizontal radius under drip irrigation with saline water increased logarithmically with the increase of leaching water amounts. Salt-injury of Calligonum planted for two years could be prevented with irrigation quantity of 37.56 L under drip irrigation with saline water. Drip irrigation with saline water could prevent salt-injury.
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