Whether it is a farm shop or a farmer, the fertilizer will be stored for a long time because it is not sold or used up after the season of use. Then the question arises, will the fertilizer be invalid if it is left for a long time? What are the differences in the rate of failure of different fertilizers?
From the characteristics of fertilizers, as long as the fertilizers are stored properly, the packaging bags are not damaged, protected from rain, moisture, and mixed with alkaline substances, and can generally be stored for a long time. Therefore, the country currently does not have provisions for the shelf life of fertilizers.
For example, fertilizers such as urea, superphosphate, and Potassium Fertilizer can be stored in a cool and dry warehouse for 20 years. Except for the agglomeration of fertilizers, there is no change in indicators such as nutrient content.
Some fertilizers will fail if left for a long time, and others will not fail, depending on the type of fertilizer. Several main commonly used varieties are introduced as follows:
1. Bicarbonate will not fail but will only lose its amount
In winter, when the temperature is around 0 ° C, the fertilizer efficiency will hardly change. Farmer friends can take advantage of the seasonal price reduction of ammonium bicarbonate in winter. It is appropriate to buy ammonium bicarbonate for spring ploughing.
In summer, when the temperature is above 30 ℃, ammonium carbonate will volatilize a lot. Very dry ammonium carbonate will become moist due to ammonia volatilization, which will reduce the weight of ammonium carbonate. Therefore, it is necessary to tighten the mouth of the bag to prevent moisture and reduce losses.
However, ammonium carbonate does not fail due to long-term release, and the fertilizer efficiency is still very good. Based on dry weight, the fertilizer efficiency does not decrease. Peasant friends can't see the loss as failure.
2. Urea only loses weight and does not fail
Can be stored for a long time when dry. When the temperature reaches 122 ° C, urea decomposes, and the decomposed ammonia and carbon dioxide volatilize and lose weight at the same time. So even if the warehouse catches fire, the remaining urea properties remain unchanged. But urea is most afraid of moisture, and it is easy to lose weight when wet with water.
3. The effect of superphosphate is unchanged
In case of rain, the effect of losing fertilizer will be worse. For example, the superphosphate produced by the phosphate iron powder with high iron and aluminum content should not be stored for more than one year. Because after storage for about 170 days, the calcium carbonate contained in it can be slowly converted into iron phosphate and aluminum phosphate, becoming insoluble substances, and the fertilizer efficiency becomes worse.
4. Potassium chloride and potassium sulfate are very stable
Potassium chloride and potassium sulfate are very stable compounds. They will agglomerate in water and be applied after being broken. The fertilizer effect will not change. However, the dosage should be calculated on a dry weight basis during application.
5. Diammonium Phosphate is afraid of high temperature
Diammonium phosphate will slowly change to monoammonium phosphate at a higher temperature, such as when the temperature is above 30 ° C. A small amount of ammonia volatilizes. Therefore, the storage of diammonium phosphate should be tied tightly to prevent ammonia volatilization.
6. Ferrous sulfate will deteriorate if it absorbs moisture
Ferrous sulfate is a strong oxidant. If wet with water, it can be easily converted into iron sulfate, which cannot be absorbed by crops. The fertilizer effect is poor, and it is most likely to fail.
7. Bacterial fertilizer cannot be used after it expires
There is a certain time limit for the bacteria activity in the biological fertilizer. Bacterial fertilizer standards stipulate that the validity period of standard strains should be on the packaging bag. Generally, the validity period is up to two years under normal storage conditions.
The microbial fertilizer cannot be used after it expires. Bacterial fertilizer must be stored in a low temperature (optimal temperature 4 ℃ -10 ℃), in a cool, ventilated and dark place to avoid failure. We are Potassium Fertilizer Supplier, welcome to consult.