How should chemical fertilizers be preserved in hot and humid days if they want to be stored without failure?

Due to unreasonable storage and improper use of some fertilizers, farmers are reluctant to buy them, or fertilization can not achieve satisfactory results. Then, in the hot summer, how should fertilization be preserved in order to really play the role of fertilizer? Many farmers' friends sell fertilizers well, but many people suffer great losses because of unreasonable storage of fertilizers. Poor storage of waste materials is easy to agglomerate, leading to nutrient loss, which in turn affects product quality. Water absorption is the bane of fertilizer caking. After caking, the properties of fertilizer products are destroyed and farmers are unwilling to buy them. In addition, fertilizer is easily soluble in water, resulting in nutrient loss. Therefore, it is very important to store fertilizer in rainy season. Generally speaking, there are three storage methods of fertilizers: warehouse storage, shed storage and open-air storage.

The drum should be ventilated, cooled and waterproof. There are two ways to store chemical fertilizers in warehouses: bulk storage and bagged storage. For nitrogen fertilizer with strong water absorption, such as ammonium nitrate, whether it is stored in bulk or in bags, in order to better prevent caking, it is necessary to reduce the storage pressure and control the height of bulk and packaging. For example, when a large bag of 25~40 kg is stored, the medium height is 20 bags. If you choose a shed for storage, the stacking position should be in a place with high terrain, flat ground and no accumulated water, with a reed mat or plastic film under it. After the fertilizer is piled, cover it with plastic film. In addition, the roof is erected and covered with waterproof cloth, which is waterproof and rainproof. In the rainy season, be very careful not to accumulate fertilizer in the open air.

Phosphate fertilizer can improve soil water use efficiency and complement each other. Enriching phosphorus can improve the utilization rate of nitrogen and has the function of nourishing nitrogen with phosphorus. Reducing the amount of nitrogen fertilizer, especially ammonium bicarbonate, is easy to be decomposed by heat. Because ammonium bicarbonate is easy to decompose when heated, and the concentration of nitrogen fertilizer is high, it is easy to cause crop seedling burning. In dry and hot season, under strong light irradiation, the temperature of bare ground can reach 50℃, which is easy to volatilize and the concentration of surface water solution is greatly improved. At this time, if fertilizer is applied as in normal weather, crop yield will not be maintained or increased, and it is likely to decrease. For example, when the rainfall is moderate, 1 mu of corn uses 12 kg of pure nitrogen, which is likely to obtain high yield. If the same amount of fertilizer is used under high temperature and drought conditions, the yield will be in danger of falling. Resistant to moisture deterioration. Urea is easy to absorb moisture, resulting in nitrogen volatilization loss; Ammonium nitrate has strong hygroscopicity, easy caking and deliquescence; Lime nitrogen and calcium superphosphate are easy to agglomerate after moisture absorption, which affects the use effect. Therefore, these fertilizers should be stored in a dry and cool place, especially when ammonium bicarbonate is stored, and the packaging should be tightly sealed to avoid contact with air.

After sun exposure or high temperature, the volatilization loss of nitrogen will accelerate; Ammonium nitrate will decompose and oxidize at high temperature and burn in case of fire. If it has caked, don't hit it hard with a hammer to avoid explosion. Nitrogen fertilizer should be stored away from light, and fireworks are prohibited. Prevent volatilization loss. Ammonia water and ammonium bicarbonate are easy to volatilize and lose, so they should be sealed when stored. Nitrogen fertilizer and calcium superphosphate are forbidden to be mixed with alkaline substances (lime, plant ash, etc.). ).) Prevent the volatilization loss of nitrogen fertilizer and reduce the fertilizer efficiency of phosphorus fertilizer. Prevent corrosion and poisoning. Calcium superphosphate is corrosive, so it is necessary to prevent contact with skin and metal appliances; Ammonia is very corrosive to copper and iron, so it should be stored in ceramic, plastic and wooden containers. In addition, chemical fertilizer can't be piled with seeds, and seeds can't be bagged with chemical fertilizer, so as not to affect seed germination.