“普钙”即过磷酸钙,在贮存中要做好“三防”,否则会造成肥效损失。 一、防潮湿。过磷酸钙的贮存如果潮湿,尤其遭到雨淋,水分就会在肥料表面形成一种饱和肥料溶液,并向内渗到颗粒之间,导致肥料潮解。这时,过磷酸钙中所含的硫酸铁、硫酸铝与磷酸二氢钙作用,使水溶性磷变成难溶性磷,不仅降低了肥效,且会加重它的酸性反应,使磷肥吸湿性增加,甚至变成溶液随水流失。 “Calcium” that is superphosphate, storage in the “three defenses”, otherwise it will cause fertilizer loss. First, anti-moisture. When stored in wet, especially over-exposed sumps, moisture forms a saturated fertilizer solution on the surface of the fertilizer and penetrates inwardly into the granules causing the fertilizer to deliquesce. At this time, the superphosphate contained in ferric sulfate, aluminum sulfate and calcium dihydrogen phosphate, the water-soluble phosphorus into insoluble phosphorus, not only reduces the fertilizer effect, and will aggravate its acidity reaction, so that increased hygroscopic phosphate , Even into a solution with water loss.