Five key points of correct selection and purchase of compound Fertilizer

Selecting suitable compound fertilizer according to local soil characteristics for farmers who are located in alkaline soil in the north, acid compound fertilizer should be selected; on the contrary, farmers in acid soil in the south should choose alkaline compound fertilizer; for soils with low organic matter content, it can be combined with organic compound fertilizer or organic-inorganic compound fertilizer.

To choose compound fertilizer according to crop varieties, ternary compound fertilizer of nitrogen, phosphorus and potassium should be selected for field crops, and nitrogen, phosphorus and potassium ternary compound fertilizer with high potassium content should be selected for cash crops such as vegetables, fruit trees, especially root crops. Compound fertilizer with high chloride content produced with potassium chloride and ammonium chloride as raw materials should not be used for chlorine-avoiding crops such as grapes, potatoes and sugar beets.

To choose and buy compound fertilizer according to the nature of fertilizer, you should learn to understand and master a little more general knowledge about fertilizer, so that you can have a good idea when choosing and buying fertilizer. For example, according to the GB15063-2001 national standard, the effective nutrient content of compound fertilizer (compound fertilizer) is divided into high, medium and low three kinds: high concentration nitrogen, phosphorus and potassium content ≥ 40%, medium concentration nitrogen phosphorus potassium content ≥ 30%, low concentration nitrogen phosphorus potassium content ≥ 25%, excluding trace elements and medium elements; water soluble phosphorus content ≥ 40% and so on. With different nutrient content, there are differences in the quantity and technical requirements of application, and of course, the price is also different.

In order to improve the fertilizer efficiency of compound fertilizer, different dosage forms of compound fertilizer should be selected for different fertilization methods. For example, when making base fertilizer, it is necessary to choose granular compound fertilizer or compound fertilizer containing slow and controlled release fertilizer, which has a long fertilizer effect and is beneficial to improve the utilization rate of nitrogen. The effect of basic application of humic acid compound fertilizer is better than that of topdressing.

According to the principle of balanced fertilization, the selection and purchase of compound fertilizer should be more in contact with agrotechnical personnel to understand the soil characteristics and the law of crop fertilizer demand, and it is best to combine with soil testing formula fertilization, according to the principle of balanced crop nutrition, and according to the soil test results. What is missing and what to make up, so as to achieve a balanced supply of crop nutrients. In addition, compound fertilizer nutrients are relatively fixed, must not be blindly selected and applied, and should not be used as a simple fertilizer to avoid unnecessary loss and waste.