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多功能菌B1514在小麦根际的定殖及对纹枯病的防治作用

, PP. 320-326

Keywords: 拮抗菌,小麦纹枯病,抗药性标记,秸秆降解,定殖

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Abstract:

为明确多功能菌B1514对小麦纹枯病的防治效果,采用紫外诱变和逐步提高诱导浓度法筛选获得抗性菌株,分析其在小麦根际和根内的定殖动态,通过盆栽和微区试验测定其对纹枯病的防治作用。结果表明,用发酵液浸种后B1514在小麦根际和根内定殖时间分别达49d和28d以上;添加玉米秸秆可延长其在根际和根内的定殖时间。B1514发酵液浸种对小麦纹枯病的盆栽防效低于对照药剂60g/L戊唑醇悬浮种衣剂;土壤中添加秸秆能提高发酵液浸种处理的防效,可达85.3%,且与戊唑醇无显著差异。田间试验结果显示B1514浸种同时添加发酵物处理的持效期较长,在小麦成熟期防效优于戊唑醇,为55.2%;秸秆降解率也高于对照,为45.5%。表明B1514有加速玉米秸秆降解和防治小麦纹枯病的作用。

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