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1·The ecological distribution of denitrifying bacteria in the three soils was studied.

研究了三种土壤反硝化细菌的生态分布。

2·The ecological distribution of denitrifying bacteria on rhizoplane and in rhizosphere of rice and barley was studied.

研究了水稻、大麦根际和根际反硝化细菌的生态分布。

3·The beneficial ammonifier and the nitrifying bacteria double increase, while the unbeneficial anaerobic bacteria and denitrifying bacteria are inhibited.

有益的氨化细菌和硝化细菌成倍增加，而无益的厌氧性细菌、反硝化细菌则受抑制。

4·Secondly, denitrification rate is improved because the oxygen pool is before the anaerobic pool and the anaerobic denitrifying bacteria readily biodegradable COD as carbon source;

第二，缺氧池与厌氧池位置互换，使得反硝化菌优先获得易降解有机物作为碳源，反硝化速率得到提高；

5·The mixture of aerobic and anaerobic sludge is used to culture denitrifying bacteria using ammonium as donors in anoxic reactor. The aim of NH3-N degradation in anoxic reactor is achieved.

将好氧污泥与厌氧污泥混合培养，在缺氧反应器中培养出了厌氧氨氧化细菌，实现了在缺氧反应器中进一步降解NH3-N的目标。