Water-soluble fertilizer raw materials can not only provide a large amount of nutrients such as nitrogen, phosphorus and potassium required by crops, but also provide micronutrients such as calcium, magnesium, boron, zinc and iron. The requirements for these basic raw materials are good water solubility, soluble in water, and can meet the form and quantity requirements of crop nutrients.

On the one hand, it can be used alone as a common water-soluble fertilizer, on the other hand, it can be used as a good raw material for the registration of water-soluble fertilizers, and is the basis for the design and production of registered water-soluble fertilizers. The water-soluble fertilizer has high nutrient concentration and suitable formula, and is more suitable for simultaneous application of water and fertilizer, achieving integration of water and fertilizer, reducing the total amount of fertilization, and exerting the synergistic effect of water and fertilizer to improve the utilization efficiency of fertilizer and water. Most of the products need to add medium and trace elements, the nutrients are more comprehensive, and the fertilizer effect is faster, which can solve the nutritional needs of the crop growth period.

The preparation of water-soluble fertilizer raw materials is relatively good water-soluble simple fertilizer. In larger farms, cooperatives, and large farms and fertilization techniques for agricultural services, these raw materials and fertilizers are generally applied directly after mixing in proportion.

Principle of selection of water-soluble fertilizer raw materials

Its selection should pay attention to two technical indicators: one is the content of insoluble substances in the fertilizer; the other is the salt index of the fertilizer, try to select the raw materials with lower salt index.

Inorganic salts can be used in materials without precipitation. Strong acid salts are usually water soluble. Nitrate, sulfate and chloride are common forms. The solubility of nitrates and chlorides is much greater than that of sulfates.

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