The rooting effect is more obvious on nitrosomonas than on nitrobacter.The nitrosomonas are more nitrobacter both in two zones.

• 相对于硝酸细菌而言亚硝酸细菌的根际效应较为明显，无论根际还是非根际的亚硝酸细菌数量均高于硝酸细菌的数量。