What are the types of flushing fertilization and how to use them?

What are the types of flushing fertilization and how to use them? Please introduce that there are many varieties of flushing fertilization, which can be divided into three types in terms of chemical properties and nutritional composition: first, inorganic type, such as urea, potassium dihydrogen phosphate, high calcium type, high potassium type, etc.; second, organic type, such as amino acid type, humic acid marine biological type, etc.; third, microbial type, such as yeast type, etc. In recent years, the variety of compound flushing fertilization has developed rapidly, which can basically be divided into two categories, one is the compound preparation produced by scientific processing and compounding of organic, inorganic, biological and other raw materials, and the other is organic and inorganic materials. Organic-inorganic liquid compound flushing fertilizer. The application of only one of these new compound preparations can meet the needs of crops for a variety of elements. In the scientific use of flushing fertilization, we must pay attention to the following points: first, it is necessary to correctly select the variety of fertilizer. Flushing fertilization is by no means as simple as "fertilizer flushing with water". It must be selected according to different crops, such as urea or ammonium nitrate when planting vegetable crops that require more nitrogen. Second, the method of use should be appropriate. Before applying flushing fertilizer, the solidified fertilizer should be hydrated and made into mother liquor, and then flushed with water. For some crops such as shallow cultivated vegetables or inconvenient soil fertilization, the prepared fertilizer can be flushed with water, and the amount of water should be controlled to ensure that nutrients are evenly distributed in the field; third, the amount and concentration of fertilizer should be reasonable. If the dosage is too large and the concentration is too high, it is easy to produce toxic and harmful gases such as ammonia, nitrogen oxide and hydrogen sulfide, causing crop poisoning; do not directly spread solid flushing fertilization in the field, watering, resulting in uneven fertilizer distribution, or even burning seedlings. After irrigation and application of fertilizer and water, combined with timely ploughing and loosening soil, the effect is better. Fourth, compound irrigation and fertilization containing microbial preparation types should be kept in a cool place to avoid sun exposure and excessive hot flashes, and should not be mixed with fungicides. If caking, you can continue to use, do not affect the fertilizer efficiency. Get more water-soluble fertilizer application technology