With the increasing use of fertilization and water-soluble fertilizers in the agricultural field, new liquid fertilizers are expected to replace traditional fertilizers and become the most widely used fertilizer varieties. However, the current price gap between various types of water-soluble fertilizers in the market is also very large. What is the difference between 6,000 yuan and 20,000 yuan of water-soluble fertilizer? What factors lead to such a large price gap?
Raw material level
Raw materials are the most fundamental factor in determining the price of water-soluble fertilizers. There are four levels of raw materials for the production of water-soluble fertilizers: food grade, feed grade, industrial grade, and agricultural grade. The grade of raw materials directly determines the price of water soluble fertilizer.
Taking potassium dihydrogen phosphate as an example, the food grade price is about 13,000 yuan, the feed grade price is about 12,000 yuan, the industrial grade raw material is about 8,000 yuan, and the agricultural grade price is about 7,000 yuan.
High-quality water-soluble fertilizers are generally produced using food-grade and industrial-grade raw materials at a high price, and the nutrient content, water solubility, absorption efficiency, heavy metal content, and product stability of the fertilizer are obviously superior to agricultural grade raw materials.
Source of phosphorus
In water-soluble fertilizers, the source of phosphorus is very important. Phosphorus plays an important role in promoting flower conservation and promoting root development. The phosphorus content in the water-soluble fertilizer is expressed by phosphorus pentoxide.
The qualified water-soluble fertilizer should be 100% water-soluble, mainly stressing that the product is free of impurities and will not block the tiny dripper of the drip irrigation tube. When the water insoluble matter is less than or equal to 0.1% to 0.2%, it indicates that the raw material source of phosphorus in the water-soluble fertilizer is high-purity chemicals, generally reaching the industrial level, and some are called drip irrigation grade or greenhouse grade. Choosing a poor phosphorus source means poor fluidity, easy agglomeration of the product, and easy to block the drip irrigation pipe and the dripper, resulting in solid deposition and scaling of the fertilizer tank, and also reducing the plant's absorption rate. Source of potassium
There are four main sources of potassium: potassium chloride, potassium sulfate, potassium nitrate, and potassium dihydrogen phosphate. In general, the price of the fertilizer with potassium chloride is the lowest, followed by potassium sulfate, and the best is the water-soluble fertilizer with potassium nitrate and potassium dihydrogen phosphate. Because potassium sulphate and potassium chloride type water soluble fertilizers contain a large amount of sulfate ions and chloride ions, long-term application can easily lead to crop calcium deficiency, cracked fruit, rotten head, black roots and stop growth.
In addition, long-term use of fertilizers containing sulfate ions and chloride ions will greatly reduce the absorption efficiency of nitrate nitrogen, and the soil salt will be enriched and formed into knots, which is not conducive to crop root growth. With water-soluble fertilizers of potassium nitrate and potassium dihydrogen phosphate, the elements can be absorbed and utilized by the crops, and there are no symptoms such as salt accumulation, and the corresponding price is also higher.
On the basis of the formula, a good manufacturer will combine the technical advantages, add some additives, formulate the water-soluble fertilizer, prevent the product from agglomerating, or add a chelating agent to prevent the leaching of the element and improve the fertilizer utilization rate. Small manufacturers often add hormones and other substances to the water-soluble fertilizer. After the hormone-containing fertilizer is applied, the plant cells will over-expand. The early effect of this fertilizer will be very obvious, but it is easy to cause premature aging in the middle and late stages, reduce plant resistance, seriously affect the plant's mid-late yield, and easily cause phytotoxicity. (Farmers Daily)
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