1. Fertilizer law. In general medium-fertilizer fields, the fertilization amount (mu) of rice field with a yield of about 500 kilograms is 1000-2000 kg of decomposed organic fertilizer, 8-12 kg of nitrogen fertilizer, 5-6 kg of phosphate fertilizer, 4-8 kg of potassium fertilizer, and zinc-deficient soil. Apply 1 to 2 kg of zinc sulfate.

2. Base fertilizer. Mainly organic fertilizer (including green manure) can be applied to decomposed organic fertilizer at a dosage of 1000-2000 kg per acre, combined with draught-flooded land; with chemical fertilizer, applying 12-15 kg of urea per acre, pass phosphoric acid generally 30 to 40 kg of calcium and 7 to 12 kg of potassium chloride (or an equal amount of compound fertilizer) are applied to the field, and the water is applied to the whole layer of water. Potassium fertilizer use can be reduced by half in areas where straw is introduced.

3. Top dressing. Rice topdressing is still dominated by nitrogen fertilizers. If base fertilizers have insufficient potassium, potassium fertilizers should also be topdressed. Topdressing should be done as follows: The manure is early enough, the panicles are stable, and the grains are light.

1 point fertilizer. After transplanting till tillering (turning green), generally early and mid-season rice is inserted for 5 days, late rice is applied for 3 days after inserting, so that it can be used for promoting tillering, 5-7 kg of urea per acre, and less organic fertilizer is applied. Potassium deficiency in the field, topdressing 3 to 5 kg of potassium chloride per acre. Fertilizer-deficient fields are planted once every 5 to 7 days. In addition, if the basal fertilizer is not applied with zinc fertilizer, foliar spraying may be carried out with 50-100 g of zinc sulfate and a 0.2% aqueous solution during the tillering period.

2 ear grain fertilizer. Panicle fertilizer is applied in the early stage of jointing (after rehydration in the field), applying 2 to 3 kg of urea and 3 to 5 kg of potassium chloride per mu. Look at the seedlings before heading and then apply urea 2.5 kg as a granular fertilizer. The application of foliar fertilizer should be paid attention to in the late period of high-yield and super-high-yield cultivation fields. For example, spraying with liquid fertilizers containing silicon and selenium can enhance the resistance of rice, early maturity, and improve the taste and nutritional quality of rice. Increase the value of goods. The foliar spraying with 0.2%-0.3% potassium dihydrogen phosphate and other fertilizers during the panicle-filling stage can prolong the survival rate of functional leaves at the later growth stage, accelerate the grain filling rate, reduce the emptying rate, increase the grain weight, and prevent Delayed chilling also has a role.

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