【摘要】 马铃薯枯萎病是马铃薯种植区为害严重的土传病害之一。将生防菌与有机肥结合施用,经田间试验,明确了对马铃薯枯萎病的防治效果及对根际土壤微生物各类群数量与土壤酶活性的影响。结果表明,生防菌与有机肥混合施用能够较好地控制枯萎病的发生;土壤中真菌数量明显下降,细菌与放线菌数量上升;土壤脲酶、磷酸酶、蔗糖酶和过氧化氢酶活性得到不同程度的提升。说明生防菌与有机肥混合施用可以改善土壤微生物区系和马铃薯生长的土壤环境,提高土壤酶活性,抑制病原菌,减轻枯萎病的发生。更多还原

【Abstract】 Fusarium wilt in potato is one of the serious soil-borne diseases in potato growing areas. The control effects, influence on rhizosphere soil microbial populations and soil enzyme activity were studied by applying biocontrol agents combined with organic fertilizer in different ways in the field. The results showed that the disease severity was significantly reduced after applying the mixture of biocontrol agents and organic fertilizer. At the same time, the change of soil microbial community was found. The number of fungi decreased, while the number of bacteria and actinomycetes increased. The activities of soil urease, phosphatase, sucrose and catalase were increased to some extent. These results indicated that soil microbial flora and soil environment of potato growth were improved, soil enzyme activities were increased, pathogens were suppressed, and severity of Fusarium wilt in potato was reduced when biocontrol agents mixed with organic fertilizer were used in potato production.更多还原