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药肥两用生物有机肥对香蕉枯萎病的防治及其机理初探

匡石滋, 李春雨, 田世尧, 左存武, 易干军   

  1. 广东省农业科学院果树研究所/农业部南亚热带果树生物学与遗传资源利用重点实验室, 广州 510640
  • 收稿日期:2012-05-12 修回日期:1900-01-01 出版日期:2013-08-08 发布日期:2013-08-08
  • 通讯作者: 易干军,博士生导师,研究员,E-mail:yiganjun@vip163.com

Effects of Bio-organic Manure on Fusarium Wilt of Banana and Its Mechanisms

KUANG Shizi, LI Chunyu, TIAN Shiyao, ZUO Cunwu, YI Ganjun   

  1. Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou 510640, China
  • Received:2012-05-12 Revised:1900-01-01 Online:2013-08-08 Published:2013-08-08

摘要: 将2种生防菌(木霉菌和枯草芽胞杆菌)与腐熟的生物有机肥混合,制成药肥两用生物有机肥(生物有机肥+混合木霉菌剂、生物有机肥+单株木霉菌剂、生物有机肥+枯草芽胞杆菌剂),应用到接种香蕉枯萎病菌的土壤中,研究其对香蕉枯萎病的防治效果及其对香蕉根尖β-1,3-葡聚糖酶活性、根际和土壤微生物的影响。盆栽试验结果表明,生物有机肥处理与对照处理相比较,病情指数降低了31.8%~50.0%,防病效果为31.8%~49.6%;香蕉植株根尖β-1,3-葡聚糖酶活性显著高于对照,提高了18.95%~37.13%。同时也影响根际土壤中枯萎病菌和主要微生物类群数量,引起土壤微生物群落结构发生变化,根际的细菌数量和放线菌数量分别比对照增加了2.75~4.30倍和2.14~2.33倍,而根际真菌数量却减少了19.07%~23.26%,根际尖孢镰刀菌的数量减少了2.18%~80.27%;土壤微生物量碳、氮分别增加了760~780 mg·kg-1和13.2~15.8 mg·kg-1

Abstract: We assessed the control effects of three fungicide-fertilizer dual purpose bio-organic manure, the mixture of bio-organic fertilizer with compound Trichoderma fungicide,single strain Trichoderma fungicide and Bacillus subtilis fungicide, on Fusarium wilt of banana. The results showed that three fertilizers had inhibitory effects on Fusarium wilt disease with the disease index of Fusarium wilt reduced by 31.8%-50.0%, the controlling efficiency reached to 31.8%—49.6%, and the activity of β-1,3-glucanase in banana root-tip significantly increased 18.95%—37.13% comparing to the control. The population of Fusarim oxysporum, microorganism community in the rhizospheric soil, and community structure of soil microorganism were changed upon application the three bio-organic fertilizers. Comparing to the control, population of rhizospheric bacteria and actinomycetes increased 2.75—4.30 and 2.14—2.33 times, respectively; population of fungi and Fusarim oxysporum in the rhizospheric soil decreased 19.07%—23.26% and 2.18%—80.27%, respectively. The contents of soil microbial biomass carbon and nitrogen increased 760-780 mg·kg-1 and 13.2-15.8 mg·kg-1, respectively.

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