The Effect of Four Herbicides on Rhizobium, AMF and Other Soil Microbe

Abstract:

In pot experiment, we studied the influence of four kinds of herbicides under the field conventional dose on rhizosphere soil microbe and two symbiosises of soybean with indigenous rhizobium and arbuscular mycorrhizas fungi at seeding stage. The result indicated that the herbicides influenced remarkably on AMF colonization of V2 and V3 period, nodule number of the V3 period, and restrained significantly on fungi number of V2 period and bacteria number of V3 period in soybean rhizosphere soil. That herbicides had a negative impact on fungi number may be an important factor in inhibiting the formation of mycorrhizae, then the inhibition on formation of mycorrhiza may lead to inhibit the formation of nodule further.

Key words:Herbicides, Rhizobium, Arbuscular mycorrhizas fungi, Rhizosphere soil microbe