Compound fertilizers and compound fertilizers are referred to as compound fertilizers. Compound fertilizers are chemical fertilizers that produce significant chemical reactions during the production process. Mixed fertilizers are fertilizers made by mechanical mixing using two or more simple fertilizers or compound fertilizers as raw materials. The three nutrients of NPK in compound fertilizers have at least two nutrient content. According to its different nutrient elements, it can be divided into binary compound fertilizer and ternary compound fertilizer.
The advantages of compound fertilizers are: multiple types of nutrients, high content of active ingredients; good physical properties, easy application of compound fertilizer particles are more solid, dust-free, uniform particle size, moisture absorption, easy storage and application. Compound fertilizers are suitable for both mechanical and manual application. Improve fertilizer efficiency, save time and increase efficiency. The application of compound fertilizer can meet the needs of crops for several nutrient elements at the same time. It is equivalent to applying multiple simple fertilizers to the soil at one time. Therefore, the application of compound fertilizers is more effective than the application of simple fertilizers to increase crop yields, and increases both production and income. . Targeted and flexible. Compound fertilizer can adjust nutrient content and formula for a certain soil, a crop, and a specific variety. The number of production can be more or less, more flexible.
Compound fertilizer application techniques and attention issues are as follows: the use of base fertilizer or seed fertilizer. Compound fertilizers can be used as basal fertilizers and can also be used as seed fertilizers. For fertilizers, it is important to pay attention to separating fertilizers from seeds. Compound fertilizers should not be used for top dressing in principle. Because compound fertilizers are used as top dressings, phosphorus and potassium nutrients are not easy to exert as fertilizers, which in turn causes waste of resources. Top dressing should be based on simple nitrogen fertilizer. Used in combination with simple fertilizers. Although the formulation of compound fertilizers is determined according to the demand of crops for nutrients and the characteristics of soil fertility, it is difficult to meet the actual needs. Therefore, when applying compound fertilizers, it should be adjusted according to the growth conditions of field crops with simple nitrogen fertilizers. The proportion of nutrients makes it finally suitable for the nutritional needs of the crop.
Use appropriate fertilization methods. The form of nutrients contained in compound fertilizers is different, and appropriate fertilization methods should be adopted. For compound fertilizers containing ammonium nitrogen, cover soil to reduce the loss of nutrients; compound fertilizers containing nitrate nitrogen should be avoided in paddy fields; compound fertilizers containing phosphorus and potassium nutrients should be used centrally. Near the root system. When selecting compound fertilizer, according to the characteristics of soil fertilization in the region and the demand characteristics of crops for nutrients, the appropriate varieties should be targeted. Only if the species is properly selected can the superiority of compound fertilizers be brought into full play so that the crops can increase their production and increase their income. Otherwise, they will only increase the production cost and the output will not be high. Generally, corn and rice should use compound fertilizer with high content of nitrogen and phosphorus, and soybean should use compound fertilizer with high content of phosphorus and potassium. In addition, the local climatic conditions, soil properties, and soil fertility levels are also important reference factors.
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