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Many vegetable farmers are accustomed to purchasing large amounts of fertilizer at a time when the price of fertilizer is low for storage throughout the year. Although this is feasible, it is not suitable for some fertilizers. Because vegetable farmers do not have special places to store fertilizers and store them at will, some fertilizers will be dampened during storage and reduce fertilizer efficiency, such as ammonium bicarbonate, ammonium nitrate, etc.; biological bacterial fertilizers, etc., due to excessive storage time, will lead to active fertilizers. A large number of bacteria died, and the use effect was greatly reduced.
From the analysis of the characteristics of fertilizers, as long as the chemical fertilizers are properly stored, the packaging bags are not damaged, are not exposed to rain, are not exposed to moisture, and are not mixed with alkaline substances. Generally, they can be stored for a long time. Therefore, the country does not currently have a prescription for the shelf life of chemical fertilizers. For example, urea, superphosphate, potassium sulphate and other fertilizers can be stacked in a cool and dry warehouse for 20 years. There is no change in nutrient content and other indicators except for the agglomeration of fertilizer. However, if it is exposed to rain, the nitrogen and potassium of the fertilizer will be lost; if it is wet, the nitrogen in the fertilizer will be volatilized; if it is exposed to alkaline substances or exposed, it will also reduce the effectiveness of the phosphate fertilizer.
Especially for some fertilizers that are not packaged in the inner bag of the bag, it is easy to get wet in the rainy days, which leads to the reduction of fertilizer efficiency. At the same time, if the urea is stored in high temperature, it will cause urea to produce biuret, if the biuret in the fertilizer If the content exceeds 2%, it will poison the seeds and seedlings, which is not conducive to the growth of vegetables. Therefore, the fertilizer cannot be stored freely after purchase. The fertilizer should be placed in a cool and dry place. For unstable or active fertilizer, the vegetable farmers should use it now. Buy now to prevent the fertilizer from lowering.
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