The storage of chemical fertilizer should achieve "six prevention"
In the dog days, it is the season of high temperature and high humidity. Some fertilizers are deformed due to moisture due to improper preservation, resulting in fertilizer caking and nutrient loss, which affects the quality of products. Generally speaking, there are three ways of chemical fertilizer storage: warehouse storage, shed storage and open ground storage.
In the high temperature and rainy season, the chemical fertilizer should be mainly stored in the warehouse. The warehouse should be ventilated, cooled, rainproof and moisture-proof. There are two storage methods of fertilizer in the warehouse: bulk storage and bag storage.
For nitrogen fertilizer varieties with strong moisture absorption, such as ammonium, whether stored in bulk or in bags, in order to avoid caking, the height of bulk pile and package pile should be controlled. For example, for storage in large bags of 25 ~ 40kg, 20 bags in a pile is the appropriate height.
If the goods are stored in a shed, the stacking place shall be a place with high terrain, flat ground and no ponding, and reed mat or plastic film shall be paved under it. After the fertilizer is stacked neatly, it shall be covered with plastic film, and the shed top shall be erected and covered with tarpaulin to prevent rain.
In particular, it should be reminded that the storage of chemical fertilizer should achieve "six prevention".
First, anti volatilization ammonia and ammonium bicarbonate are very volatile, so they should be sealed during storage. In addition, nitrogen fertilizer and calcium superphosphate are strictly prohibited to be mixed and stacked with lime, plant ash and other alkaline substances to prevent chemical reaction, resulting in volatilization of nitrogen fertilizer and reducing the fertilizer efficiency of phosphorus fertilizer.
Ammonium bicarbonate, lime nitrogen and calcium superphosphate are easy to agglomerate after moisture absorption, which affects the application effect. In addition, after ammonium bicarbonate absorbs moisture, nitrogen is easy to volatilize, so it should be sealed firmly to avoid contact with air. Therefore, these fertilizers should be stored in a dry and cool place.
III. anti corrosion calcium superphosphate is corrosive and should be prevented from contacting with skin and metal appliances; Ammonia has strong corrosivity to copper and iron and should be stored in ceramic, plastic and wooden containers. In addition, chemical fertilizer should not be stacked together with seeds, and do not use chemical fertilizer bags to pack seeds, so as not to affect seed germination.
The volatilization loss of nitrogen will be accelerated after the sun exposure of high-temperature nitrogen fertilizer; Ammonium will decompose oxygen in case of high temperature, which will cause the failure of chemical fertilizer.
(V) ammonium and potassium are combustion supporting. They cannot be stacked together with inflammables such as kerosene, gasoline, straw and sawdust to avoid fire.
Vi. if ammonium, potassium and other metals are mixed with copper, iron and other metal powders, once they are rubbed and impacted, they will cause accidents. Therefore, after these fertilizers are caked and hardened, do not hit them with metal objects, but crush them with heavy objects.
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