磁化盐水滴灌土壤水盐时空分布及枣树生长特性反馈机制研究

劣质水的灌溉利用始终是排灌与农业生态环境领域的一个研究热点。为安全高效利用新疆南疆面广、量大的地下盐水资源，充分发挥枣树耐盐，对盐分胁迫不敏感的特质。本项目开展磁化盐水滴灌土壤水盐时空分布及枣树生长特征反馈机制研究，通过磁化强度与盐水矿化度组合，开展4年田间测坑枣树滴灌定位试验，通过定点取样和连续监测土壤水分和盐分，明确磁化强度对盐水在土壤中运移和分布的影响，揭示土壤盐分在空间变化的驱动机制；通过测定枣树各生育期根系层土壤水盐含量及不同组织器官阴阳离子的含量，分析盐水磁化后对枣树不同器官中离子含量的影响，揭示磁化盐水灌溉对枣树调节吸收、运输及分配盐离子的内在影响机制；通过观测枣树生长量、叶面积、根系分布等生态指标，叶绿素、光合参数、叶片细胞结构等生理指标，分析枣树生理生态特征对磁化盐水的响应，探求提高枣树产量（或品质）的最佳磁化强度-盐水矿化度关系。为盐水在南疆高效利用提供理论依据。

Utilization of inferior irrigation water has always been a research hotspot in the fields of irrigation and drainage, and agro-ecological environment. In order to safely and efficiently use the extensive and large-scale underground saline-water resources in southern Xinjiang, China, the characteristics of jujube tree salt tolerance and insensitivity to salt stress are fully utilized. This project is ready to carry out research of magnetized saline-water on spatial-temporal distribution of soil water-salt and the feedback mechanism of jujube growth characteristics under drip irrigation. We will set different combinations of magnetization intensity and salt content in water, and then carrying out a four-year test of jujube in the field. Through fixed-point sampling and monitoring soil moisture and salinity, the effect of magnetization on the migration and distribution of salt in the soil is clarified, and revealed the driving mechanism of the spatial change of soil salinity By measuring the salt and ion content in various organs of the stage, we will analyze influence of magnetized saline-water on the ion content in different organs of jujube trees. It reveals the internal effect mechanism of magnetized saline-water irrigation on regulating absorption, transportation and distribution of jujube trees. In addition, observation of ecological indicators such as new growth, leaf area, and spatial distribution of roots, and physiological indicators such as chlorophyll, photosynthetic parameters, and leaf cell structure of jujube trees, we will analysis response to magnetized saline-water on physiological and ecological characteristics of jujube, and sought the best relationship between magnetization and salinity in improvement yield (or quality) of jujube. This research will provide a theoretical basis for more efficient use of saline- water in southern Xinjiang, China.