Automatic control three-dimensional trickle irrigation method

The invention discloses an automatic control three-dimensional trickle irrigation method, which comprises the steps that an automatic control three-dimensional trickle irrigation system is set; an upper limit signal and a lower limit signal of a soil water content are set, and the opening and closing of control valves are controlled; the automatic liquid supply for plants is realized by the opening and closing of the control valves; under the conditions that an Nth layer and an N+1th layer of control valves are opened simultaneously and a main pipe is always in a full-filling state under the water pressure effect and is a pressured pipeline, at the moment, the Nth layer and the N+1th layer of control valves are opened, water flow enters branch pipes under the pressure effect, the main pipe is rapidly filled due to the pressure difference effect, the water flow is continually supplied until a soil humidity sensor regulates. According to the invention, as a trickle irrigation technology is used, the utilization efficiency of water is high and can reach 90-95%, and the balanced irrigation of water and fertilizer is realized; since the irrigation method is combined with the sensor, the automatic opening and closing of a water supply valve are realized, and a time-saving effect is realized; the pressure which is generated by water self-weight is used as water supply power, so no unnecessary energy sources are consumed.