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最近收到一些读者来信,询问过磷酸钙与碳酸氢铵混合堆沤的问题,现答复如下: 过磷酸钙呈酸性,碳酸氢铵系弱碱性,近于中性,两者都是速效化肥,施于土壤都能很快被作物吸收利用。所以从肥效而言,可以分别单独施用,不必混合堆沤。但过磷酸钙与碳酸氢铵混合堆沤,从化学反应看,肥分和肥效也不会造成损失: CaH_4(Po_4)十2NH_4HCO_32NH_4H_2Po_4+ (过磷酸钙) (碳酸氢铵) (磷酸氢铵) Ca(HCO_4)_2 (重炭丐) 反应生成的磷酸二氢铵和重碳酸钙都是水溶性的,能被植物吸收,同样是速效态养分。 此外,过磷酸钙中常含有游离态的硫酸和磷酸,而碳酸氢铵不太稳定,易于挥发出氨气,造成氮素损失:(NH_4HCO_3←NH_3↑+H_2CO_3),如果把过磷酸钙与碳酸氢铵混合堆沤。则
Recently, I received some letters from readers asking about the problem of mixing calcium phosphate with ammonium bicarbonate. The answers are as follows: SSP is acidic, ammonium bicarbonate is weakly alkaline and nearly neutral, both are quick-acting fertilizers , Applied to the soil can be quickly absorbed by crops. Therefore, in terms of fertilizer efficiency, can be applied separately, do not have to mix pile 沤. However, superphosphate and ammonium bicarbonate mixed reactor, from the chemical reaction point of view, fertilizer and fertilizer efficiency will not cause loss: CaH4 (Po4) ten2NH4HCO3_32NH4H2Po4 + (superphosphate) (ammonium bicarbonate) (ammonium hydrogenphosphate) Ca ( HCO_4) _2 (heavy carbon beggar) reaction of ammonium dihydrogen phosphate and calcium bicarbonate are water-soluble, can be absorbed by plants, the same fast-acting nutrients. In addition, the superphosphate often contain free sulfuric acid and phosphoric acid, and ammonium bicarbonate is not stable, easily volatile ammonia, resulting in nitrogen loss: (NH_4HCO_3 ← NH_3 ↑ + H_2CO_3), if the superphosphate and ammonium bicarbonate Mixed pile 沤. then