The difference between applying fertilizer to water-soluble fertilizer is first conceptual
（一）Rush fertilization is also called water flush fertilization. It is a kind of topdressing method, that is, a solid quick-acting chemical fertilizer is dissolved in water and the fertilizer is applied with water. Flush fertilization is irrigation fertilization, and the irrigation method can be divided into well irrigation and barren irrigation, and also includes drip irrigation and sprinkler irrigation.
The raw materials used for flush fertilization are relatively common. The first raw material: the materials used for flush fertilization can be completely water-soluble raw materials. The second raw material, the material used for flushing fertilization, can also be incompletely water-soluble raw material
（二）Water Soluble Fertilizer (Water Soluble Fertilizer, WSF for short) is a multi-component compound fertilizer that can be completely dissolved in water. It is easier to be absorbed by crops, and its absorption and utilization rate is relatively high. It is more critical that it can be applied to facility agriculture such as sprinkler irrigation to achieve water and fertilizer integration and achieve the efficiency of water, fertilizer and labor.
Simply put, water-soluble fertilizers are multi-element compound fertilizers that can be quickly dissolved in water (with or without precipitation as the standard). The criterion of this classification is the physical properties of the fertilizer, that is, whether it can be quickly dissolved in water. In addition, water-soluble fertilizer is an academic or legal concept, and fertilization is a popular name. The so-called academic concept refers to that in the strict sense of fertilizer classification, it can become an independent category. The so-called legal concept refers to the fertilizer registration management method of the Ministry of Agriculture, which is a fertilizer variety that can be declared. To say that fertilization is a common name means that this is just a way of saying that the fertilizer consumption practice exists.
In terms of fertilizer application methods, all fertilizer application methods are generally two big and three small. The two are: applied as a solid or liquid. The three small ones are spraying and flushing in the liquid. Of course, Chong Shi has several subdivisions. According to the fertilizer registration management method, there are 5 technical standards for water-soluble fertilizers: Daken elements, amino acids, humic acids, trace elements, and organic water-soluble fertilizers (usually corporate standards). These water-soluble fertilizers are often Both can be sprayed and sprayed
Medium fertilization can be either water-soluble fertilizer or not. As long as the fertilizer that can be diluted with water and then applied with water can be called flush fertilization, such as compound fertilizer, human feces and urine, they are not flush fertilization. After you dilute with water to apply liquid, they become flush fertilization.
The material used for water-soluble fertilizer is relatively strict.
First, the water-dissolved liquid has no sediment.
Second, the raw materials used must be quickly soluble in water.
Third, the heavy metals contained in water-soluble fertilizer raw materials must not exceed the standard. Generally, the materials used are: ammonium dihydrogen phosphate, diammonium hydrogen phosphate, potassium dihydrogen phosphate, potassium nitrate, powder urea, etc., and various trace element raw materials that dissolve in water. How to identify the advantages and disadvantages of water-soluble fertilizers, mainly explain the following aspects
Look at the formula: Water-soluble fertilizers such as flush fertilization are actually formula fertilizers. Different formulas are formulated according to different crops, different soils and different water qualities to maximize the nutritional needs of crops, improve fertilizer utilization and reduce waste. Therefore, the formula is to identify The key to the quality of water-soluble fertilizers such as flushing and fertilizing.
Look at the content: Good water-soluble fertilizers and other water-soluble fertilizers use industrial-grade or even food-grade raw materials. The purity is very high, and no filler is added. Therefore, the content is relatively high, and 100% can be absorbed by the crop. Utilized nutrients, nitrogen, phosphorus, potassium content can reach 60% or higher. Poor flush fertilization and other water-soluble fertilizers are generally low in content, and each less content will have a difference in cost.
Look at the water solubility: To identify the water solubility of water-soluble fertilizers such as fertilization, you only need to dissolve the fertilizer into the water, and see if the solution is clear and transparent. If it is the same as clear water except the color of the fertilizer, the water solubility is very good. With precipitation, the water solubility is very poor. It cannot be used in drip irrigation systems, and the waste of fertilizer will be more.
Smell the taste: Good water-soluble fertilizers are made from high-purity raw materials, without any taste or with a very light fragrance. The smelly fertilizer is either added with hormones or too many harmful substances. This fertilizer works quickly, but it does not have any benefit to the disease resistance and continuous quantity and quality of the crop.
Do comparisons After preliminary screening of water-soluble fertilizers such as flush fertilization through the above simple methods, then do field comparisons to determine what water-soluble fertilizers such as flush fertilization are selected based on actual application effects.