First, the principle of fertilization

1. Balanced fertilization is based on the law of fertilizer requirements of each crop, soil nutrient supply status and fertilizer effect, determine the appropriate amount of fertilizer and fertilization methods. Combining organic fertilizer with inorganic fertilizer, combining basic fertilizer and top dressing, the principle of balanced fertilization is achieved.

2. Organic fertilizers that are harmless to the use of organic fertilizers must be decomposed, fermented, and detoxified to kill pathogenic microorganisms, eggs, and weed seeds. It is forbidden to use industrial wastes, urban garbage and sludge, and farmyard fertilizers that have not reached the harmless index.

3. The implementation of fertilizer compounding and specialization in the selection of fertilizers should meet the requirements of the fertilizer quality standards (NY/T394) for fertilizer varieties and quality requirements, try to use organic - inorganic compound fertilizer and various crop-specific compound fertilizer.

Second, rice standardized fertilizer technology

Fertilizer should be reused for basal fertilizer, early recovery of manure, skillful use of fertilizer, and supplement of grain fertilizer. The amount of fertilizer used was based on nitrogen fertilizer, and the ratio of nitrogen, phosphorus and potassium was used to determine the amount of phosphorus and potassium fertilizer. Urea urea 225 ~ 300 kg per hectare, determine the amount of nitrogen fertilizer, according to nitrogen: phosphorus: potassium = 1:0.5:0.3 ~ 0.5 to determine the amount of phosphorus and potassium fertilizer.

1. Seedbed soil preparation per square meter of bed soil applied high-quality rot 10-15 kg of agricultural fertilizer, Zhuang wolfberry nutrient 0.125 kg, mixed well with the prepared bed soil, bed soil thickness of about 10 cm, PH value of 4.5 to 5.5.

2. Seeding seedlings in the 2.5-meter seedlings during the period of detoxification were found to contain 1.5 g to 2 g of ammonium sulfate per square meter, 0.25 g of zinc sulfate, and 100 times diluted in foliar spray. After spraying, the leaves were rinsed with water in a timely manner. 6 days before starting the radon, 150 grams of diammonium phosphate was sprayed per square meter, and the seedlings were sprayed with water to wash the seedlings.

3. Honda fertilizes farmyard manure and uses less fertilizer. 30 tons of mature organic fertilizer per hectare was applied in combination with the flood and drought; 112.5-150 kg of diammonium phosphate per hectare and 75 kg of potassium sulfate were applied in combination with the full layer of water preparation.

4. Top dressing fertilizer top dressing principles: pods and feet, steady panicles, and grain size.

(1) Apply 50-75 kg of urea per hectare after transplanting till the tiller.

(2) Spike fertilizer is applied at the beginning of jointing, with 50-75 kg of urea per hectare and 50-75 kg of potassium sulfate. The application of potash fertilizer can increase the seed setting rate and 1000-grain weight, promote early maturity, enhance disease resistance and lodging resistance.

(3) Applying before the heading of the grain fertilizer, applying 15 to 22.5 kg of urea per hectare. Although the absorption of nitrogen is reduced after heading, if the soil supply of nitrogen is insufficient, the photosynthetic efficiency of the leaves will be reduced. The appropriate amount of top-dressing grain fertilizer can prevent premature aging of roots and leaves.

(4) If the top-dressing fertilizer is not applied with zinc fertilizer, it can be used for foliar supplementation with 50~100g zinc sulfate and 0.2% aqueous solution during the tillering period. The use of silicon-containing, selenium-containing liquid fertilizers (concentration in accordance with the instructions) for leaf spraying can enhance rice disease resistance, early maturation, improve rice taste and nutritional quality, and increase commodity value. Spraying with 0.2%～0.3% potassium dihydrogen phosphate and other liquid fertilizers during the filling stage of the panicle spike can prolong the survival rate of the functional leaves at the later growth stage, accelerate the grain filling rate, reduce the emptying rate, increase the grain weight, and prevent delays. Type cold injury has a certain role.

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