What kind of fertilizer is nitrogen, phosphorus and potassium?

Nitrogen, phosphorus and potassium play an important role in the process of plant growth, so what kind of fertilizer is nitrogen, phosphorus and potassium? What's the use?

What kind of fertilizer is nitrogen, phosphorus and potassium fertilizer?

Nitrogen, phosphorus and potassium fertilizer is a fertilizer that supplements nitrogen, phosphorus and potassium for plants. Because plants take away more nutrients during growth and harvest, they often need to supplement these nutrients by applying nitrogen, phosphorus and potassium fertilizer.

Second, what is the function of nitrogen, phosphorus and potassium fertilizer?

1. Nitrogen fertilizer: chemical fertilizer with nitrogen nutrients as the main components, including ammonium bicarbonate, urea, nitramine, ammonia, ammonium chloride, ammonium sulfate and so on.

two。 Phosphate fertilizer: chemical fertilizer with phosphorus nutrient elements as the main component, including ordinary calcium superphosphate, calcium magnesium phosphate fertilizer and so on.

3. Potash fertilizer: chemical fertilizer, which is mainly composed of potassium nutrient elements, is not widely used at present, and the main varieties are potassium chloride, potassium sulfate, potassium nitrate and so on.

Third, how to use nitrogen, phosphorus and potassium fertilizer?

1. Should be classified application, that is to say, because of the soil because of crops to choose compound fertilizer varieties: Rice, corn, sorghum and other cereal crops need more nitrogen, can choose nitrogen and phosphorus compound fertilizer; legume crops can fix free nitrogen in the air, phosphorus and potassium compound fertilizer can be selected; while cash crops can choose ternary or multi-element compound fertilizer adapted to local soil and climatic conditions.

two。 It should be applied in proportion, that is, in combination with elemental fertilizer. The nutritional composition of compound fertilizer is fixed, and only when combined with various elemental fertilizers can the nutrient needs of crops in different periods be met.

3. To apply it scientifically, the main reason is that the application method should be appropriate. Clayey soil has strong fertility and should be applied deeply; sandy soil is easy to be de-fertilized and can be applied a small number of times; compound fertilizer containing ammonium nitrogen should be applied deeply to reduce loss; compound fertilizer containing phosphorus and potassium should be concentrated and applied near the root system to avoid nutrient fixation and facilitate crop absorption and utilization; potassium dihydrogen phosphate with high price generally should not be used as base fertilizer.