According to the characteristics of the local soil to buy suitable compound fertilizer for farmers in the northern part of the alkaline soil, the general should buy acidic compound fertilizer; on the contrary, for the acidic soil farmers in the south should use alkaline compound fertilizer; For soils with low organic matter content, organic compound fertilizers or organic-inorganic compound fertilizers may generally be added.
According to the variety of crop species to buy compound fertilizer for field crops, the general should use nitrogen, phosphorus, potassium compound fertilizer; for vegetables, fruit trees and other economic crops, especially root crops need more potassium, potassium should be used more High nitrogen, phosphorus and potassium ternary compound fertilizers; It is not appropriate to apply compound fertilizers with high chloride ion content produced from potassium chloride and ammonium chloride to avoid chlorine crops such as grapes, potatoes, and sugar beets.
According to the nature of the fertilizer to buy compound fertilizer should usually learn more about and master a little knowledge about fertilizer, easy to know when buying fertilizer. For example: GB15063-2001 national standard provides that the compound nutrient (compound fertilizer) effective nutrient content is divided into high, medium and low three: high concentration of nitrogen, phosphorus, potassium content ≥ 40%, medium concentration of nitrogen, phosphorus and potassium content ≥ 30%, low concentration Nitrogen, phosphorus and potassium content ≥ 25%, excluding trace elements and elements; water-soluble phosphorus content ≥ 40%. Different nutrient content, there are differences in the number of applications and technical requirements, of course, the price is not the same.
According to fertilization method to buy compound fertilizer in order to improve the compound fertilizer's fertilizer efficiency, for different fertilization methods should use different formulations of compound fertilizer. For basal fertilizer, it is necessary to purchase granular compound fertilizers, or to purchase compound fertilizers containing slow-release and controlled-release fertilizers. The long-term effect of fertilizers is beneficial to increase the utilization of nitrogen. Humic acid compound fertilizer is more effective than topdressing.
According to the principles of balanced fertilization, compound fertilizers should be usually contacted by agricultural technicians to understand the soil characteristics and the law of fertilizer requirements for crops. It is best to combine soil fertilization and formula fertilization, according to the principle of balanced crop nutrition, according to the results of reasonable soil testing. Formula, lack what to make up, to achieve a balanced supply of crop nutrients. In addition, compound fertilizer nutrients are relatively fixed, must not be blindly selected and applied, nor can it be used as a single fertilizer to avoid unnecessary losses and waste.
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