The invention relates to a method for balanced
fertilizer application through wheat-corn
crop rotation
straw returning to field, and belongs to the technical field of agricultural plantation and
fertilizer application.
Winter wheat-summer corn
straw in the annual
crop rotation period is all returned to field, the
fertility of a
cultivated land can be improved by decomposed part of the
straw, the
water holding capacity of the
cultivated land can be improved by undecomposed part of the straw, and the
fertilizer-water ratio is kept. By measuring soil, applying a fertilizer and
sowing wheat seeds,the
nutrient ratio is reasonable, unnecessary excessive fertilizer application waste is reduced, meanwhile the
soil fertility is effectively improved, and the wheat yield is guaranteed.
Urea topdressing is conducted in the elongation stage after wheat revives, and the
soil carbon-
nitrogen ratio of the straw and an
organic fertilizer is balanced. By measuring soil, applying a fertilizer and sowingcorn seeds, a
solid corn compound fertilizer is applied, and the corn yield is guaranteed. The
organic fertilizer is additionally applied during straw turning to field, the soil
physical structure can be greatly improved, and the
reproduction capacity of the soil is improved. The fertilizer application total amount control and multi-stage management are realized and are effectively combined withcultivation and
tillage measures, and the water-fertilizer balance,
organic fertilizer-
inorganic fertilizer balance and sustainable soil utilization of a soil-
crop system are ensured.