Is water soluble fertilizer different from compound fertilizer?

Water-soluble fertilizer is a quick-acting fertilizer with good water solubility and no residue. It can be completely dissolved in water and can be directly absorbed and utilized by the roots and leaves of crops. The use of water and fertilizer, with water and fertilizer, achieves the integration of water and fertilizer. Its effective absorption rate is more than double that of ordinary fertilizers, reaching 80-90%; and the fertilizer efficiency is fast, which can solve the nutritional needs of high-yield crops in the rapid growth period. The water requirement of the drip irrigation system is only 30% of that of ordinary fertilizer, and the application of fertilizer can be done almost without labor, which greatly saves labor costs. So is there a difference between water soluble fertilizer and compound fertilizer?

There are many types of nutrients in compound fertilizers, and compound fertilizers can be applied at one time, and at least two main nutrients of crops can be supplied at the same time. For example, ammonium phosphate does not contain any useless by-products, and its anion and cation are the main nutrients absorbed by crops. The nutrient distribution of this fertilizer is relatively uniform. Compared with the powdery or crystalline unit fertilizer, the structure is tight, the nutrient release is uniform, and the fertilizer effect is stable and long. Due to the small amount of sub-components, the adverse effect on the soil is small.



What is the difference between the two?



1, nutrients



Water-soluble fertilizer refers to a compound fertilizer that is completely soluble in water. The form is mainly divided into solid and liquid. The nutrient content is divided into a large amount of elements, medium-quantity elements and trace elements of water-soluble fertilizers. Functional water-soluble substances such as amino acids and humic acid are also commonly found on the market. fertilizer.



There are not only many types of water-soluble fertilizers, but also a variety of ratios, such as balanced fertilizers with high balance of nitrogen, phosphorus and potassium, high-nitrogen fertilizers, high-potassium fertilizers and high-phosphorus fertilizers. The fertilizer itself also contains various key functions for different crop growth. Trace elements, while traditional compound fertilizers are fertilizers containing two or more elements, but the main components are only NPK, and the formula and nutrient elements are relatively single.



2, method dosage



The water-soluble fertilizer is widely used in almost all areas of China. The application methods are mainly foliar spraying, drip irrigation under the membrane, root irrigation and mountain sprinkler irrigation, etc., which can be optimized for the characteristics of different regional planting environments. The application method, unlike the compound fertilizer, must be completely used under the soil where the crop is grown. The water-soluble fertilizer is usually a concentrated powder or a liquid, and the amount used is generally small. For example, an ordinary balanced type water-soluble fertilizer is used. If it is used, the amount of the required amount per acre is only about 5 kg, and the use of the compound fertilizer is at least 40 kg. about.



3, the effect



Water-soluble fertilizer is mainly used as top dressing for crops. The difference from other traditional top dressings such as urea is that water-soluble fertilizer is a quick-acting fertilizer, and the rate of crop absorption is faster, but the duration of effect after application is relatively short, and it is only suitable for crop growth. At the peak of the fertilizer, the compound fertilizer is generally used as the initial base fertilizer for planting. The water-soluble fertilizer has a high absorption rate.



According to experiments, if the application method is proper, it is generally about 90%, up to 95%, almost all absorbed, and the absorption and utilization rate of traditional compound fertilizer in the process of crop growth is only about 60%.