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In order to achieve reasonable fertilization and improve fertilizer efficiency, farmers usually combine fertilizers for application. However, the active ingredients of each fertilizer are different. Some fertilizers will react after a series of reactions, which not only fails to improve the fertilizer efficiency, but also causes nutrient loss. Therefore, there are two taboos when mixing fertilizers:
Avoid chemical changes, leading to nutrient loss. Ammonium nitrogen fertilizer can not be mixed with alkaline fertilizers such as grass ash, lime, etc., otherwise it will cause nitrogen loss. Nitrate nitrogen fertilizer can not be mixed with acidic fertilizers such as superphosphate, so as to avoid the decomposition of nitrate nitrogen to nitrogen oxides, resulting in nitrogen loss. Water-soluble phosphate fertilizer can not be mixed with alkaline fertilizers such as lime, grass ash, ash ash and potassium fertilizer to prevent the conversion of water-soluble phosphorus into poorly soluble phosphorus, so that the effectiveness of phosphate fertilizer is reduced.
Avoid changes in physical properties. When two fertilizers with strong hygroscopicity are mixed, the mixture is more hygroscopic. For example, a mixture formed by mixing ammonium nitrate with urea has greatly enhanced hygroscopicity and is easy to agglomerate. Therefore, the two should not be mixed. For example, when urea is mixed with superphosphate, although the time for conversion of urea to ammonium can be prolonged, the crystal water contained in the superphosphate can be freed, and the humidity of the fertilizer is increased, which is easy to agglomerate. Therefore, the two should not be mixed.
Avoid chemical changes, leading to nutrient loss. Ammonium nitrogen fertilizer can not be mixed with alkaline fertilizers such as grass ash, lime, etc., otherwise it will cause nitrogen loss. Nitrate nitrogen fertilizer can not be mixed with acidic fertilizers such as superphosphate, so as to avoid the decomposition of nitrate nitrogen to nitrogen oxides, resulting in nitrogen loss. Water-soluble phosphate fertilizer can not be mixed with alkaline fertilizers such as lime, grass ash, ash ash and potassium fertilizer to prevent the conversion of water-soluble phosphorus into poorly soluble phosphorus, so that the effectiveness of phosphate fertilizer is reduced.
Avoid changes in physical properties. When two fertilizers with strong hygroscopicity are mixed, the mixture is more hygroscopic. For example, a mixture formed by mixing ammonium nitrate with urea has greatly enhanced hygroscopicity and is easy to agglomerate. Therefore, the two should not be mixed. For example, when urea is mixed with superphosphate, although the time for conversion of urea to ammonium can be prolonged, the crystal water contained in the superphosphate can be freed, and the humidity of the fertilizer is increased, which is easy to agglomerate. Therefore, the two should not be mixed.
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