碳酸氢铵(简称碳铵)是农村中大量使用的一种氮肥。这种肥料性质不够稳定,特别在气温高湿度大时容易分解和挥发。贮存、运输和施用不当,常引起氮素严重损失,降低肥效。为了经济合理有效地施用碳铵,我们自1974年以来进行了长效碳铵肥试验,发现经过长效化后,能显著减少碳铵的挥发损失,提高氮素利用率。 一、长效碳铵肥的特点 长效肥就是采用化学的或物理的方法改变化学氮肥的速效性质,制成一种缓慢发挥肥效的长效肥料。碳铵长效肥是将粉状碳铵经过机械造粒、磷酸酸化、钙镁磷肥包膜、石蜡沥青封面,和磷肥调理等几道工序,制成重约1克的缓效性颗粒肥。长效碳铵肥很象中成药蜡丸,如果将它从中切开,可以看到在黑色疏水性 Ammonium bicarbonate (referred to as ammonium bicarbonate) is a large amount of nitrogen fertilizer used in rural areas. This fertilizer is not stable enough in nature, especially when the temperature is high and humidity is easy to decompose and volatilize. Improper storage, transportation and application often cause serious losses of nitrogen and reduce fertilizer efficiency. In order to apply ammonium bicarbonate economically and effectively, we have carried out the long-term ammonium bicarbonate test since 1974 and found that after long-term aging, we can significantly reduce the volatilization loss of ammonium bicarbonate and increase the nitrogen utilization rate. First, the characteristics of long-acting ammonium bicarbonate Long-acting fertilizer is the use of chemical or physical methods to change the quick-acting properties of chemical nitrogen fertilizer, made of a slow-acting fertilizer effect long-term fertilizer. Ammonium bicarbonate long-acting fertilizer is powdered ammonium bicarbonate through mechanical granulation, phosphoric acid acidification, calcium magnesium phosphate coating, paraffin wax asphalt cover, and phosphate fertilizer conditioning and other processes, made of about 1 g of slow-release fertilizer. Long-acting ammonium bicarbonate fertilizer like wax pills, if it is cut from it, you can see in the black hydrophobic