Full name phosphorus fertilizer. Fertilizer with phosphorus as the main nutrient. The size and speed of the fertilizer effect are determined by the effective phosphorus pentoxide content, soil properties, fertilizer application methods, and crop types.
1. Classification by source
According to the source can be divided into:
(1) Natural phosphate fertilizers, such as guano, animal bone meal and fish bone meal.
(2) Chemical phosphate fertilizers, such as calcium superphosphate, double superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder, etc.
2. Classified according to the solubility of the phosphate contained
(1) Water-soluble phosphate fertilizers, such as ordinary calcium superphosphate, double superphosphate, etc. Its main ingredient is monocalcium phosphate. Soluble in water, quick fertilizer effect.
(2) Lycium soluble phosphate fertilizers, such as precipitated phosphate fertilizers, steel slag phosphate fertilizers, calcium magnesium phosphate fertilizers, defluorinated phosphate fertilizers, etc. Its main ingredient is dicalcium phosphate. Slightly soluble in water but soluble in 2% citric acid solution, the fertilizer effect is slow.
(3) Insoluble phosphate fertilizers, such as bone meal and phosphate rock powder. Its main ingredient is tricalcium phosphate. It is slightly soluble in water and 2% citric acid solution, and can only produce fertilizer effect after gradually changing into monocalcium phosphate or dicalcium phosphate in the soil.
3. Classification by production method
According to the production method, it can be divided into wet phosphate fertilizer and thermal phosphate fertilizer.
Appropriate application of phosphorus fertilizer can promote tillering and early maturity of crops, enhance their cold resistance, and improve their yield and quality.
Phosphate fertilizer is a chemical fertilizer containing the crop nutrient phosphorus produced from phosphate rock.
Phosphorus is a component of cell protoplasm in plants and plays an important role in cell growth and proliferation; phosphorus is also involved in photosynthesis in plant life, utilization of sugar and starch, and energy transfer.
Phosphorus fertilizer can also promote the growth of the root system of plants at the seedling stage and make the plants mature earlier. When the plant bears fruit, a large amount of phosphorus is transferred to the seeds, making the seeds plump.
The earliest phosphate fertilizer was superphosphate, which has been gradually replaced by high-concentration phosphate fertilizers such as ammonium phosphate and double superphosphate.
The grade of effective components of phosphate fertilizer is expressed by the mass fraction of phosphorus pentoxide.
Qualitative identification of nitrogen, phosphorus and potassium fertilizer types First, phosphorus fertilizers can be distinguished from nitrogen and potassium fertilizers in terms of appearance and solubility. Commonly used nitrogen and potassium fertilizers are generally white crystals (imported potassium chloride is often reddish, lime nitrogen black), and soluble in water. Commonly used phosphate fertilizers are gray powder, insoluble or partially soluble in water. If you want to further distinguish nitrogen and potassium fertilizers, you can grind the fertilizer into powder, take a small amount and burn it on a small iron sheet. If it can burn, it will melt or emit white smoke as nitrogen fertilizer; if it does not burn, but jumps or cracks, it is Potassium fertilizer, so far you can roughly distinguish nitrogen fertilizer, phosphorus fertilizer, and potassium fertilizer.
