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菌根真菌和死谷芽孢杆菌生物有机肥对连作棉花黄萎病的协同抑制

DOI: 10.7685/j.issn.1000-2030.2012.06.012, PP. 68-74

Keywords: 棉花,黄萎病,死谷芽孢杆菌,生物有机肥,丛枝菌根真菌

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Abstract:

通过温室盆栽试验,育苗期接种丛枝菌根真菌(AMF),移栽时接种死谷芽孢杆菌(BacillusvallismortisHJ-5)、有机肥(OF)或者生物有机肥(HJ-5OF),研究了不同处理对棉花黄萎病和棉花生长的影响。结果表明配合施用AMF与HJ-5OF显著降低了棉花黄萎病的发病指数,与对照相比其病情指数下降了72.80%;根际可培养微生物数量和种类发生显著变化,施用AMF与HJ-5OF处理的真菌、大丽轮枝菌菌核数量分别比对照下降了68.88%、47.20%,细菌、放线菌数量分别为对照的23.81倍、2.40倍;根际区系中,真菌的种类显著降低,细菌的种类显著增加;AMF和HJ-5OF的协同作用,显著提高了棉花的生物量,促进了棉花对磷素的吸收。结论接种AMF提高HJ-5OF对棉花黄萎病的防治效果,促进棉花的生长,改善土壤微生物区系。

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