微咸水水源线源滴灌土壤水盐运移特征试验研究

Research on the Characteristics of Soil Water and Salt Movement in Brackish Water under Line-source Drip Irrigation

滴灌被认为是最适合用于微咸水开发利用的灌溉技术,在微咸水资源丰富的我国有巨大的开发应用潜力。通过在室内采用土箱进行入渗试验,研究了微咸水滴灌条件下线源滴灌3个特征剖面的水盐分布特征及矿化度对水盐分布的影响。结果表明利用微咸水滴灌能形成一个较高含水率且含盐量较低的区域,为作物提供一个良好的水盐环境;在相同入渗深度,矿化度越大,含水率越大,含盐量也越大;湿润锋交汇界面处的土壤含水率和含盐量一般均大于未交汇同等土壤深度的含水率和含盐量。

It is well known that drip irrigation is the most suitable for the irrigation technology in the exploitation and utilization ot brackish water, and it has huge potential that has rich source of it in China. Based on line-source drip irrigation, this paper studies the characteristics of soil water and salt movement in the three characteristic sections and the effect of mineralization degree of saline water. The results show that a higher moisture content and lower salinity of the region is created. It provides a good water-salt environment for the crops. Meanwhile, at the same depth of infiltration, the greater the mineralization degree of saline water, the greater the moisture content and salinity. The intersection side of soil moisture and salt content is generally bigger than un-intersection side .