Water and fertilizer EC value regulation and control system for drip irrigation cotton field

The invention discloses an EC value regulation and fertilization control system for a drip irrigation cotton field, which mainly comprises an irrigation electromagnetic valve, a mother liquor tank, a mother liquor tank electromagnetic valve, a Venturi fertilizer absorber, an EC sensor, a control cabinet, a fertilization pump, a fertilization electromagnetic valve, a controller, a touch screen and the like, and is characterized in that a reservoir and the mother liquor tank are connected with a mixing tank through pipelines; the Venturi fertilizer absorber is arranged between the mother liquor tank and the mixing tank and used for sucking mother liquor into the mixing tank to be mixed with irrigation water, the EC sensor is arranged on an outer pipeline of the mixing tank and used for measuring the mass concentration of mixed fertilizer liquor, and the fertilization pump is arranged on an outer output pipeline of the mixing tank and used for executing fertilization work of the mixed fertilizer liquor. The touc