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中文摘要：
通过室内不同沙管深度的盐碱土膜孔灌自由入渗试验,研究了沙管深度对盐碱土土壤水盐运移的影响。结果表明,相同入渗时间,累计入渗量随着沙管深度的增加而增加,并与入渗时间呈幂函数关系;不同沙管深度的湿润锋运移距离随着时间延长而增大,与入渗时间符合幂函数关系;相同入渗时间,湿润锋运移距离随着沙管深度的增加而增大;随着距沙管中心距离的增加,不同沙管深度的土壤含水率减小,电导率值增大;随着沙管深度的增加,脱盐区范围逐渐增大。以上研究结果可为盐碱土改良措施提供合理依据。
英文摘要：
Through indoor infiltration experiments of sand pipe depth with different levels in film-hole irrigation,the impact of sand pipe depth on the transport and distribution of water and salt is analyzed.The results show that：with same infiltration time,the cumulative infiltration volume increases along with the increases of sand pipe depth,and the cumulative infiltration volume is relates to the power function of the infiltration time;the wetting front transport distance increases with time going by,the wetting front is relates to the power function of the infiltration time;with same infiltration time,the longer the sand pipe depth is,the bigger the wetting front transport distance is;the soil water content in different sand pipe depth levels decrease whereas the conductivity increases with the increases of distance from the sand pipe center,the longer the sand pipe depth is,the bigger the zone of low salt content.The results may have certain significance to the rational use of improvement measures of alkali-saline soil.
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