1, basal fertilizer: Before the site preparation, at the same time about 30% of nitrogen fertilizer, all phosphate fertilizer, more than 50% of potash fertilizer used as base fertilizer. In order to prevent the white seedlings of maize, 1-1.5 kilograms of zinc sulphate is used, and 1,000-1,500 kilograms of organic manure can be applied where possible. It can be applied to the sowing ditch once in combination with the soil preparation and the fertilizer is applied to the tillage layer of 10-15 cm. It is best to apply deep furrows on the furrows in time. When this method is inconvenient, it can also be spread on the ground and ploughed into the soil in time.
2, mouth fat: per acre can be used 10 kg of DAP or 7.5 kg of special mouth fat as mouth fat, is conducive to promoting the growth and development of seedlings.
3. Top dressing: The total amount of top dressing is about 60% of the total nitrogen application and 50% of potash fertilizer. The topdressing is generally performed in two stages. It can be applied twice in the big bell mouth period 10 days after the jointing and 10-15 days before the corn continuation. The land with light and heavy weight (2:3 in proportion) can be used for one-time fertilization. At the beginning of the big bell, it was applied one at a time. Topdressing methods can generally be applied, or they can be applied at a depth of 7-10 cm, and should be covered with soil immediately after application.
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