Balanced fertilization method under condition of wheat/corn one-year-two-harvest cultivation total straw returning

The invention relates to a balanced fertilization method under the condition of wheat/corn one-year-two-harvest cultivation total straw returning. In the winter wheat season, corn ears are harvested when corn is ripe, straw and root remains are smashed, or the straw and the root remains are smashed while the corn ears are harvested by a machine, the corn straw and the root remains are smashed once again before soil preparation, base fertilizer is applied, soil is subjected to rotary tillage or is subjected to ploughing to bury the corn straw, then rotary tillage is conducted, wheat is sown, and topdressing is carried out in the jointing stage; in the summer corn season, wheat is harvested by the machine when being ripe, meanwhile, wheat straw is smashed, the wheat straw is made to cover the field, then corn is subjected to no-till machine seeding or manual dibble seeding, wheat stubble cleaning is carried out at the corn seedling stage, topdressing is performed at the belltop stage and the anthesis maturity period, or the corn is subjected to no-till machine seeding, meanwhile, seed fertilizer is applied, and topdressing is performed at the belltop stage and the anthesis maturity period. According to the balanced fertilization method, wheat and corn are used as one fertilization unit, the fertilizing amount and the fertilizing method are balanced, the full stand and healthy seedling and the high and stable yield of wheat and corn are guaranteed, soil organic matter is increased, the soil fertility is raised, sustainable highyield is achieved, and the fertilizer utilization efficiency is improved.