The usual detecting methods, and including the theories and characteristics of each method, conclusion, and trend of research of the nitrifying bacteria were given.

• 重点介绍了传统方法、免疫学和分子生物学方法的原理，并对各种方法的优缺点进行了分析。文章还对硝化细菌的研究方向进行了阐述。