四种除草剂对根瘤菌、AMF等土壤微生物的影响

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

摘要:

本文采用盆栽试验, 研究4种除草剂在大田常规剂量下, 对根际土壤微生物和土著根瘤菌、AMF与苗期大豆共生的影响。结果表明, 除草剂对V2期大豆根际土壤中真菌数量和V3期细菌数量的抑制作用显著, 对V2和V3期AMF的侵染率、V3期根瘤数量影响显著。除草剂对土壤中真菌数量的负面影响可能是抑制菌根形成的重要因素, 对菌根形成产生的抑制可能会进一步导致根瘤形成受到抑制。

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.