Corn and soybean rotation planting method for improving black soil fertility

The invention belongs to the technical field of crop rotation planting, and provides a corn and soybean rotation planting method for improving black soil fertility. The method comprises the steps of soil preparation, seed pretreatment, soybean base fertilizer application, soybean sowing, soybean weeding, soybean harvesting, corn base fertilizer application, corn sowing, additional fertilizer application, corn weeding, corn harvesting and the like. The method solves the production problems that the depth of a plough layer of soil becomes shallow, the volume weight of the soil is increased, a plough pan is hard, the effective soil amount of the plough layer is obviously reduced, the straw amount is large, and the ground temperature is low, the sowing quality is poor, the fertilizer utilization rate is low, and the damage degree of diseases, weeds and weeds is aggravated due to full-amount covering returning. By means of the corn and soybean rotation planting method, the yield per mu of corn can be 248.6 kg, the