What is diammonium phosphate? How to use ammonium phosphate?

What is diammonium phosphate? How to use ammonium phosphate? Please also understand the netizens to help introduce Diammonium phosphate is a kind of binary high concentration compound fertilizer with low nitrogen and high phosphorus. Diammonium phosphate contains 18% N and 46% P2O5. The total nutrient concentration can reach 64%. It has the characteristics of low nitrogen, high phosphorus and no potassium in nutrient supply. Therefore, the product characteristics and use methods of diammonium phosphate have been sorted out by farming network. The following are listed in detail for netizens 'reference. Characteristics of diammonium phosphate: Diammonium phosphate is also known as diammonium hydrogen phosphate. Diammonium phosphate is easily soluble in water and its aqueous solution is alkaline. Diammonium phosphate is a high-concentration quick-acting chemical fertilizer, suitable for all kinds of soil and crops, the effect is more significant in nitrogen-loving crops, often used as base fertilizer and topdressing. Diammonium phosphate contains two nutrients, nitrogen and phosphorus, so it can be regarded as a compound fertilizer, and the concentration is relatively high, so when used as seed fertilizer, avoid direct contact with seeds. Diammonium phosphate is suitable for all kinds of soil and crops. Diammonium phosphate contains nitrogen and phosphorus, which are necessary for crop growth. Nitrogen is an important element constituting protein and promotes the formation of protein and chlorophyll. Phosphorus participates in photosynthesis and respiration in crops. It can not only promote the growth of crop roots and aboveground parts, but also improve the quality of crop fruits and the adaptability of crops to the external environment, promote fruit ripening and improve crop quality. Use of diammonium phosphate: Ammonium phosphate is suitable for base fertilizer. The large amount of phosphorus content in base fertilizer can ensure the demand of grain and crop development in the later stage of crop growth, and also ensure the yield. Since phosphorus in diammonium phosphate is three times that of nitrogen, it can be used alone as a base fertilizer for legume crops with strong phosphorus and nitrogen fixation ability, and the application amount is 8~10 kg. When diammonium phosphate is used as base fertilizer in other crops, it is necessary to combine appropriate amount of elemental nitrogen and potassium fertilizer to adjust and improve the ratio of nitrogen and potassium. The role of crop base fertilizer is mainly to supplement middle and late nutrition, so ammonium phosphate should be applied deeply. Ammonium phosphate has poor mobility in soil, and its absorption efficiency can be improved only when it is applied to the distribution area of main roots of crops. The depth of basal fertilizer application should be different for different crops, especially for fruit trees, 15~20 cm for vegetables and 20~30 cm for grain crops. The amount of diammonium phosphate used as base fertilizer varies according to crop types and previous crop fertilization conditions. For example, less organic fertilizer can be applied to farmland; less or ternary compound fertilizer can be applied to plots with annual ammonium phosphate application. The recommended amount of ammonium phosphate as base fertilizer for general grain crops is about 10~12 kg, and for cotton is 12~16 kg per mu. As for the regulation of nitrogen and potassium fertilizer and the increase of the proportion of nitrogen fertilizer, it is not necessary to add it all in the basal fertilizer. Nitrogen can also be added when topdressing, and the effect will be better. Notes on the use of diammonium phosphate: Although diammonium phosphate is quick-acting, it is not suitable for topdressing and flushing fertilizer. Because the granular diammonium phosphate is scattered on the surface during topdressing, the dissolution is slow and less, the dissolved phosphoric acid has poor migration performance to the lower layer of the soil, while moving, it is fixed, and the fixed product is insoluble in water, and it is not absorbed and utilized by the root system, thus losing the fertilizer effect. If diammonium phosphate is used as water flushing fertilizer, it will cause the more expensive phosphorus to be taken away from the surface runoff or enriched on the surface, while the root system of crops is mainly released underground, and the root system cannot reach the fertilizer, and the fertilizer efficiency is poor, which will cause the loss of phosphorus on the surface and pollute the water environment. This two-way problem should not happen. What are the common nitrogen fertilizers?