aerobic nitrogen fixing bacterium的用法和样例：
- There was a negative correlation between the nitrogenase activities of nitrogen fixing bacteria in root and that in leaf and stem.
- We also found that growth activity of the strain HWZ2 was accelerated in co cultures with two other nitrogen fixing bacteria (GWZ1 and GWZ2) isolated from the rice root.
- associative nitrogen fixing bacteria
- Associated nitrogen fixing bacteria