Which fertilizer is better for wheat? How should wheat be fertilized?

(1) High and medium-yield wheat fields.

High-yielding wheat fields have high soil fertility and good production conditions. The input of nitrogen fertilizer has been excessive in recent years, but the input of potassium fertilizer has been relatively insufficient. In terms of fertilization, it is necessary to increase the input of organic fertilizers, fully implement the return of straw to the fields, and follow the principle of controlling nitrogen, stabilizing phosphorus, increasing potassium and replenishing microorganisms. For high-yielding wheat fields (more than 500 kg/mu), apply 4 m3 of organic fertilizer per mu, 14-17 kg of pure nitrogen (N), 8-10 kg of phosphorus (P2O5), and 8-10 kg of potassium (K2O). Fertilization method: phosphate fertilizer is applied at the bottom once, nitrogen fertilizer is applied at the bottom at 30%, topdressing at 60% at the jointing stage, and 10% at the booting stage of wheat; potash fertilizer is applied at the bottom at 70%, and topdressing at the jointing stage at 30%. For middle-yield wheat fields, apply 3.5 m3 of organic fertilizer per mu, 12 to 15 kilograms of pure nitrogen (N), 7 to 8 kilograms of phosphorus (P2O5), and 5 to 8 kilograms of potassium (K2O). Fertilization methods: Nitrogen fertilizer is applied at the bottom at 40% and topdressing at 60% at the jointing stage; potassium fertilizer is applied at the bottom at 70% and topdressing at the jointing stage at 30%; phosphorus fertilizer is applied at the bottom once. For micro-fertilizer application, zinc sulfate or manganese sulfate can be used for seed dressing, with 2 to 4 grams of fertilizer per kilogram of seeds. Spray potassium dihydrogen phosphate during the middle and late stages of wheat growth to increase the thousand-grain weight of wheat.

(2) Late sowing of wheat fields.

In late-sown wheat fields, due to late stubble establishment, sowing is delayed, and the accumulated temperature before winter is insufficient. Heavy fertilizer is required to promote seedlings, so as to achieve the purpose of strong seedlings before winter and rapid transformation in spring. Apply more than 3 meters 3 of organic fertilizer per acre of high-yielding fields, 14 to 15 kilograms of pure nitrogen (N), 6 to 7 kilograms of potassium (K2O), and 8 to 9 kilograms of phosphorus (P2O5); (N) 12 to 14 kg, phosphorus (P2O5) 6 to 7 kg, potassium (K2O) 5 to 6 kg. Fertilization methods: Nitrogen fertilizer should be applied at the bottom at 40 to 50 o'clock, top dressing at 50 to 60 o'clock at the jointing stage, and phosphorus and potassium fertilizer should be applied at the bottom at one time. In the middle and late stages, multi-component micro-fertilizers should be sprayed on the leaves in a targeted manner. In addition, due to the large potassium consumption in wheat-cotton intercropping areas, the amount of potassium fertilizer can be appropriately increased.