关键词: 灌溉模式;土壤水盐运移;灰色关联法;引黄灌区;

Abstract: To study the water and salt transport mode and change characteristics in the soil of the Yellow River diversion irrigation area, the Heigangkou Yellow River diversion irrigation area in Kaifeng City, was taken as a representative study area.Different irrigation schemes, drainage schemes, and fertilization schemes were set up to study the water and salt transport mode and change characteristics of the soil layer from 20cm to 100cm in the irrigation area.The gray correlation method was used to analyze the sensitive factors affecting the soil water and salt transport state.The research results show that when the depth increases, the water content first decreases and then increases, while the total salt content first increases and then decreases.Compared with the quota sprinkling irrigation mode, the soil water content is higher and the total salt content of the soil is less in the quota submersion irrigation mode.When the drainage period is short, the soil moisture content and total salt content become less.The amount of fertilizer has little effect on soil moisture content, the total salt content is the least when no fertilizer is applied, and the total salt content increases when the amount of fertilizer is increased.After grey correlation analysis, it is considered that the order of sensitive factors affecting soil water and salt transport is: irrigation mode > irrigation quota > drainage period > drainage intensity > fertilizer amount.

Key words: irrigation mode; water and salt transport; gray correlaeion method; Yellow River diversion irrigation area;