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Second, the mixing principle Fertilizer can be mixed to master three principles: 1, after mixing does not produce undesirable physical properties. 2. It will not cause nutrient loss after mixing. 3. After mixing, it is beneficial to improve fertilizer efficiency and efficacy.
Third, the fertilizer mix classification 1, fertilizer can be mixed. After mixing two or more kinds of fertilizers, not only the nutrients are not lost, but also the physical properties can be improved, the nutrient conversion can be accelerated, and the fertilizer efficiency can be improved. Such as: phosphate rock powder mixed with ammonium sulfate, ammonium nitrate mixed with potassium chloride, superphosphate mixed with manure, compost and so on. 2, can be temporarily mixed, but can not be placed for a long time. If some fertilizers are mixed, if they are applied immediately, there will be no adverse consequences, but if they are left for a long time after mixing, they will cause effective nutrient loss or deterioration of physical properties. For example, calcium is mixed with nitrate ammonia, and urea is mixed with potassium chloride. 3. Unmixable fertilizer. Some fertilizers mix with each other, causing nutrient loss and fixation, reducing fertilizer efficiency, and these fertilizers cannot be mixed. For example, ammonia nitrogen fertilizers such as ammonium sulfate and ammonium hydrogencarbonate cannot be mixed with alkaline fertilizers such as grass ash, lime, calcium magnesium phosphate, kiln ash potassium, etc., otherwise nitrogen loss will occur; quick-acting phosphate fertilizer and alkaline fertilizer will often cause phosphorus. Degradation, reducing the available phosphorus content; mixing poorly soluble phosphate fertilizer with alkaline fertilizer will become phosphorus that is more difficult to be absorbed by crops.
Fertilizer mixed application should pay attention
First, the advantages of mixed application summed up, fertilizer mixed application has the following advantages: First, according to different regions, different soils, different crops, select the appropriate fertilizer varieties, mix in the appropriate proportions, so that the nutrients are diverse, slow speed, there are Conducive to the absorption and utilization of various nutrients by crops. Second, it can reduce the loss of nutrient volatilization and improve fertilizer efficiency. For example, urea (or ammonium sulfate) mixed with superphosphate can promote the preservation of nutrients and improve fertilizer efficiency. Third, it can improve the physical properties of fertilizers. For example, when ammonium nitrate is mixed with potassium chloride, the hygroscopicity is reduced and it is easy to apply. The fourth is the mixed application of fertilizer, which can turn the multiple fertilization operations into one time, which can save labor and work.
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