【摘要】 采用平板计数法,研究不同氮、磷、钾无机肥类型、不同无机肥用量及无机肥不同配比对生物复混肥活菌数的影响.结果表明,硫酸铵、磷酸二氢铵和硫酸钾较适合作为生物复混肥的无机肥源;单加硫酸铵可显著降低肥料中的活菌数,添加w=2%的纯氮时对活菌数的影响相对较小;单加磷酸二氢铵对活菌数的影响较复杂,以添加w分别2%、4%的P2O5为宜;单加硫酸钾可显著增加肥料中的活菌数,以添加w=6%的K2O为宜;同时添加无机氮、磷、钾肥可显著降低生物复混肥中的活菌数,无机氮、磷、钾较适宜的添加配比(w)为4%N+4%P2O5+4%K2O.更多还原

【Abstract】 The effects of inorganic fertilizer on the living microbial numbers in microbial-organic-inorganic compound fertilizers were studied by indoor simulated experiment with plating count.The results showed that ammonium sulfate（（NH₄）₂SO₄）,ammonium dihydrogen phosphate（NH₄H₂PO₄） and potassium sulfate（K₂SO₄） were suitable inorganic fertilizers as N,P and K sources respectively for making up microbial-organic-inorganic compound fertilizer.The numbers of living microbe in microbial-organic-inorganic compound fertilizer were decreased significantly by adding（NH₄）₂SO₄,but there was less influence in the fertilizer receiving a low dose N（2%）.Adding 2% to 4% P₂O₅ in form of NH₄H₂PO₄ was relatively appropriate as living microbial population in the fertilizer was larger.The addition of K₂SO₄ increased the amount of living microbes in the fertilizer,and 6% K₂O in form of K₂SO₄ was optimal.The numbers of living microbes were remarkably reduced by adding N,P,K inorganic fertilizer simultaneously,and the suitable proportion of inorganic N,P,K fertilizer was 4%N,4%P₂O₅ and 4%K₂O.更多还原