Scientia Agricultura Sinica ›› 2012, Vol. 45 ›› Issue (2): 239-245.doi: 10.3864/j.issn.0578-1752.2012.02.005

• PLANT PROTECTION • Previous Articles     Next Articles

Control Effect and Action Mechanism Research of Bio-Organic Fertilizer on Eggplant Bacterial Wilt

 DING  Chuan-Yu, QIAO  Huan-Ying, SHEN  Qi-Rong, RAN  Wei, CHEN  Wei   

  1. 1.南京农业大学资源与环境科学学院/江苏省固体有机废弃物资源化高技术研究重点实验室，南京210095
  • Received:2011-04-11 Online:2012-01-15 Published:2011-09-09

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Abstract: 【Objective】The objective of this study is to research the effect of bio-organic fertilizer BIO-36 and BIO-23 on eggplant bacterial wilt, enzyme activities and rhizosphere soil microbial. 【Method】 The organic fertilizer (pig manure compost and amino acid fertilizer) were innoculated with Bacillus subtilis strain II-36 and I-23 for a second solid fermentation to produce the specific bio-organic fertilizer BIO-36 and BIO-23. A pot experiment was used to identify the control effect. 【Result】 The bio-organic fertilizer inhibited the eggplant wilt disease (antagonistic effect, respectively, 96% and 91%). The activities of antioxidases (catalase, peroxidase and superoxide dismutase) in eggplant leaves were significantly higher, but the content of MDA was reduced remarkably. CAT activities for BIO-36 and BIO-23 increased by 25.0% and 23.7% respectively as compared with the control, the activities of POD increased by 99.5% and 93.6% and that of SOD increased by 32.7% and 29.8%, respectively, while the contents of MDA decreased by respectively 29.5% and 26.3%, respectively comparing with control. In addition, the application of bio-organic fertilizer changed microbial communities in rhizosphere soil significantly decreased the number of Ralstonia solanacearum, increased fungi and actinomycetes, smaller changes in bacteria. 【Conclusion】 The specific bio-organic fertilizer against eggplant bacterial had some connection with induction of systemic resistance of plant and regulation of rhizosphere microbial diversity.

Key words: bio-organic fertilizer, eggplant bacterial wilt disease, bio-control effect, action mechanism

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