Apparatus and method for foliar fertilizer supply control

The invention relates to the technical field of foliar fertilizer application, and discloses an apparatus and a method for foliar fertilization supply control. The apparatus comprises a supporting device and an isolating device, the supporting device comprises a flat plate and a telescopic support for supporting the flat plate, the flat plate is provided with a through hole, the trunk of a plant traverse through the through hole to make the overground position of the plant positioned above the flat plate, the movable isolating device is arranged on the flat plate with the through hole and is used for covering the overground position of the plant, the isolating device is provided with a spraying opening, and the upper surface of the flat plate is provided with a water-absorbing material. The apparatus for foliar fertilization supply control can isolate the overground part and the underground part of the plant without affecting the growth of the plant, realizes uniform spraying under real cultivation conditions