随着淡水资源短缺，微咸水开发利用成为缓减水资源供需矛盾的主要途径之一。由于微咸水中含有盐分，影响土地质量和作物生长。因此，发展科学土壤水盐调控方法是实现微咸水安全利用的重要内容。本研究将采用理论分析、试验研究和数学模型相结合方法，在分析磁化水和去电子微咸水理化特征的基础上，提出活化微咸水理化特征评价指标。通过分析活化微咸水对土壤理化特征和水盐运移特征影响，构建适合活化微咸水入渗数学模型，以及水盐运移动力参数确定方法。通过系统研究活化微咸水膜下滴灌土壤水、盐、肥运移和棉花生长特征，提出适合活化微咸水灌溉的水、盐、肥胁迫系数表达式。将活化微咸水灌溉与化学改良和膜间控盐方法相结合，对控盐效果进行综合评价。在综合分析活化微咸水膜下滴灌土壤水盐分布与棉花生长特征基础上，构建活化微咸水膜下滴灌棉花生长模型和土壤水盐调控综合方法，为微咸水安全利用和保障土地生产力提供理论依据和方法。

Slight saline water utilization is one of main approach to solve the problem of water resource shortage. There exist is some salt in slight saline water and soil quality and crop growth will be affected when the slight saline water is used to irrigate farmland. It is one important measure to develop scientific regulation method of soil water and salt in order to safely use slight saline water to irrigate farmland. In the project, the methods of theoretical analysis, experimental study and mathematical model are adopted. Physical and chemical feature of magnetic and ionizated slight saline water will be analyzed and the evaluation indexes of activated slight saline water physical and chemical property will be put forward. The suitable infiltration equation and dynamic estimation method of parameter of soil water and salt transport will be established based on the analysis of effects of activated slight saline water on soil physical and chemical properties and soil water and salt transport. The suitable stress coefficients of water, salt and fertilizer will obtained through analysis of soil water and salt transport and cotton growth properties under the activated slight saline water drip irrigation that the soil surface is covered with plastic film mulch. The controlling salt accumulation role of combined approach of the activated slight saline water irrigation, chemical amelioration and salt controlling method between plastic film mulch will be evaluated. The cotton growth model for activated slight saline water drip irrigation with plastic film mulch will be developed considering the role of chemical amelioration and controlling salt method between the plastic film mulch in order to provide the theory and method for safe using of slight saline water and maintaining soil productivity.