Three principles of composting fertilizers
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During the storage or application process of the fertilizer during the mixing or mixing, due to the different composition of various fertilizers, some fertilizers will undergo a series of chemical reactions after mixing, resulting in loss of nutrients or decreased nutrient availability. Fertilizers that fall into this category cannot be mixed with each other. For example, ammonium nitrogen fertilizer can not be mixed with alkaline fertilizers such as ash, ash, potassium, lime, etc., otherwise it will cause nitrogen loss; water-soluble phosphate fertilizer can not be mixed with alkaline fertilizers such as lime, ash, ash and potassium to avoid water solubility. Phosphorus is converted into poorly soluble phosphorus, which reduces the effectiveness of phosphorus. The nitrate nitrogen fertilizer cannot be mixed with acidic fertilizers such as superphosphate, so as to avoid the decomposition of nitrate nitrogen to escape nitrogen oxide and cause nitrogen loss.
Second, after the fertilizer is mixed, its physical properties are good.
Some fertilizers do not undergo chemical changes, but they can cause physical changes and make the mixing process and fertilization process difficult. If two fertilizers with higher hygroscopicity are mixed, the mixture is more hygroscopic. For example, a mixture formed by mixing ammonium nitrate with urea has a hygroscopic critical relative humidity of only 18%, and the hygroscopicity is greatly improved. Therefore, the two should not be mixed. If urea and superphosphate are mixed, although the time for conversion of urea to ammonium can be prolonged, the crystal water contained in the superphosphate will be freed, which will increase the humidity of the fertilizer, easily agglomerate, and cause difficulty in application. With the mixture.
3. After the fertilizer is mixed, it should be beneficial to improve fertilizer efficiency and fertilization efficiency.
Properly mixed fertilizer can not only improve the fertilizer efficiency, but also improve the fertilization efficiency and reduce the number of fertilization times. If the phosphate fertilizer is mixed with compost, manure and other organic fertilizers, organic fertilizers can produce various organic acids during the fermentation decomposition process, which can combine calcium ions and promote the dissolution of phosphorus. At the same time, the contact area between phosphorus and soil can be effectively reduced after mixing. To reduce the fixation of phosphorus in the soil and improve the fertilizer efficiency of the phosphate fertilizer. If ammonium bicarbonate or ammonium sulfate is mixed with superphosphate, it can also improve the effect of fertilizer.