In both the urea and ammonium sulfate N-sources, the effects of PBP to soil nitrifying potential and nitrifying capacity was studied by incubation experiment.

• 经过利用尿素、硫铵两种不同氮源下的室内土壤硝化势和土壤硝化强度生物培养实验，研究PBP系列在增加氮素利用率方面的效应；