Low-pressure quick-uniform irrigation fertilizer applicator

A low-pressure quick-uniform irrigation fertilizer applicator comprises a rack, an embedded negative-pressure quick-uniform fertilizer applicator, a flow meter with a flow control valve, a fertilizerbarrel, a fertilizer injection pipe A and a fertilizer injection pipe B, the embedded negative-pressure quick-uniform fertilizer applicator main body is fixed at the bottom of the rack and comprises afertilizer applicator tube shell and a fertilizer applicator core body, a fertilizer suction port penetrates through the fertilizer applicator tube shell and is connected with one end of a fertilizerinjection tube B, and the fertilizer applicator core body comprises a Venturi tube, a progressive trapezoidal jet flow port and a rotational flow generation device; one end of the advanced trapezoidal jet orifice is an inlet end of the venturi tube, and one end of the rotational flow generating device is an outlet end of the venturi tube; a liquid outlet of the fertilizer barrel is connected withone end of a fertilizer inj