Phosphorus and potassium fertilizers include plant ash, compound fertilizer, potassium dihydrogen phosphate, and potassium nitrate phosphate fertilizer.
1. Plant ash
Plant ash is the ashes of plants. It is a substance produced after burning plants. Plant ash is the most common potash fertilizer. In rural areas, planters commonly transport plant ash to the fields in woven bags and spread it.
2. Compound fertilizer
Compound fertilizer refers to a chemical fertilizer containing two or more nutrient elements. It is a fertilizer processed from ores. Compound fertilizer is rich in phosphorus and potassium. It is a commonly used base fertilizer in agriculture and is essential.
3. Potassium dihydrogen phosphate
Potassium dihydrogen phosphate is currently the most high-quality type of phosphorus-potassium fertilizer. Not only does it have a high content of ingredients, but it is also more effective than other fertilizers. It can regulate crop growth and increase yields. Most of them are used for foliar spraying to supplement crops. Nutrition.
4. Potassium nitrate phosphate fertilizer
The total nutrient content is ≥42%, the moisture content is ≤3%, the total nitrogen content is ≥22%, the available phosphorus content is ≥10%, and the particle size is 3.8-4.2%. It has a high utilization rate and relatively low price, which is good for reducing the cost of fertilizer per mu. It is commonly used as a base fertilizer, like compound fertilizer.
1. Fertilize the soil
Water-soluble superphosphate is applied to neutral and calcareous alkaline soils. Insoluble phosphate fertilizers such as phosphate rock powder and bone meal can only be effective when applied on acidic soil.
2. Concentrated use
Minimize the contact surface with the soil. This is an effective fertilization method to reduce the amount of dust-effective phosphorus in phosphate fertilizers that are fixed by calcium, magnesium, iron, and aluminum. Fertilization methods such as strip application, hole application, and foliar spraying are all good ways to reduce and prevent phosphorus fertilizer from being fixed by the soil.
3. Mixed application with organic fertilizers
The mixed application of phosphate fertilizers and organic fertilizers can not only reduce the contact surface between phosphate fertilizers and soil but also, organic acids can help improve the effectiveness of calcium and magnesium phosphate fertilizers. The effect of mixing phosphate fertilizer with high-quality manure and compost at a ratio of 1:10 is very good. If it is piled first and then applied, the effect will be even better.
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