Method for reducing tobacco field non-point source pollution through multi-family crop rotation mixing planting

The invention discloses a method for reducing tobacco field non-point source pollution through multi-family crop rotation mixing planting. The method comprises the steps of tobacco field planting layout, tobacco moisture ridging, corn planting and management, vicia villosa planting and management, flue-cured tobacco fertilization management, tobacco field drainage management and the like. According to the method, tobacco field soil residual nutrients and idle land are fully utilized, nitrogen and phosphorus loss is reduced, the nitrogen and phosphorus utilization efficiency and absorption capacity of crops of different families are utilized, the residual nutrients in the soil are absorbed and repeatedly utilized, combined and matched planting is carried out in combination with forks, and finally, the planting method for fully utilizing surplus nutrients of the tobacco field and covering idle land to achieve the purpose of reducing nitrogen and phosphorus emission through alternate mixing planting of crops of