The nitrifying bacteria are chemosynthetic autotrophs. 硝化細菌是化能合成的自養生物。
The number of heterotrophic bacteria and nitrifying bacteria increased with the time of the hydraulic retention time, contrary to the nitrobacter. 根際細菌和硝化細菌數量隨著水力停留時間增加而增加，而根際反硝化細菌數量則減少。
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