Hydraulic circuit of energy-saving fertilizer mixing type layered ditching, fertilizing and soil covering all-in-one machine

The utility model discloses a hydraulic circuit of an energy-saving fertilizer mixing type layered ditching, fertilizing and earthing all-in-one machine, and belongs to the technical field of hydraulic transmission of agricultural machinery. The hydraulic circuit mainly comprises an oil filter, an overflow valve, a gear pump, a hydraulic control one-way valve, a direct-acting overflow valve, an energy accumulator, a one-way valve, a three-position four-way electromagnetic directional valve, a speed regulating valve, a flow distributing and collecting valve, a fertilizer box opening degree regulating hydraulic cylinder, a ditching depth regulating hydraulic cylinder, a chemical fertilizer conveying hydraulic motor and an organic fertilizer applying hydraulic motor, an organic fertilizer opening breadth adjusting hydraulic cylinder, a chemical fertilizer first breadth depth adjusting hydraulic cylinder, a chassis lifting hydraulic cylinder and an oil tank. The automatic adjusting device is applied to a fertiliz