西北地区国土面积大，光热资源丰富，是我国粮食和经济林果生长的重要基地之一。但由于受淡水资源短缺、土壤盐碱化和肥力低下多重影响，导致土地质量下降和灌溉水生产效率低，极大限制农业高效而可持续发展，开展活化水灌溉提升地力与促进作物生长机理研究具有重要理论价值和生产实际意义。本项目将从灌溉水生理生态功能入手，以创造最佳作物生境为主要目标，采取室内外试验研究、理论分析与数学模拟相结合方法，深入系统研究活化灌溉水理化性质对土壤水盐肥运移特征、土壤溶解氧含量和主要菌类活力、根系吸水和作物生长与产量和品质的影响，揭示活化水灌溉提升地力与促进作物生长作用机理，提出活化水理化特性的综合评价指标，建立活化水灌溉条件下土壤水盐肥运移数学模型，以及描述作物生长与作物生境耦合作用数学模型，丰富土壤物质传输理论，发展农田灌溉生理生态学，为优化农田水、盐、肥、溶解氧管理措施和作物生境调控模式提供理论和方法。

The northwest region is one of the important area for the growth of food and economic fruit in China, due to its large farmland area and abundant light and heat resources. However, there exist is dual effects of the shortage of fresh water resources , soil salinization and low fertility that causes decline in the quality of land and lower irrigation water production, and agricultural efficiency and sustainable development are greatly limits. It is of great theoretical value and practical significance to study the mechanism of activated water irrigation for improving soil fertility and promoting crop growth. This project will first be analyzed the physiological and ecological function of irrigation water and take the creation of the best crop growth environment as the main goal. Combined with experimental research, theoretical analysis and mathematical simulation method, the effects of physical and chemical characteristics of activated irrigation water on the transport of soil water, salt and fertilizer, the content of soil dissolved oxygen, the activity and variation of main fungi will be studied systematically. The effects on root water absorption and crop growth, yield and quality by activated water irrigation were revealed, and a comprehensive evaluation index describing the physical and chemical properties of activated water will be put forward. The mathematical model of soil water, salt and fertilizer transport under activated water irrigation and the mathematical model describing the coupling effect of crop growth and crop growth environment will be established in order to enrich the theory of soil material transport， to develop the physiological ecology theory of farmland irrigation, and to optimize farmland water, salt, fertilizer, dissolved oxygen management measures and crop growth environment regulation model provide scientific theory and method.