title: [Effects of continuous application of bio-organic fertilizer on banana production and cultural microflora of bulk soil in orchard with serious disease incidence].
abstract: A field experiment was conducted for two years to investigate the effects of different fertilization applications on the suppression of banana fusarium wilt disease, crop yield, fruit quality and culturable microflora in a banana orchard which has been monocultured with banana for 12 years and suffered serious banana fusarium wilt disease. The fertilizers included chemical fertilizer (CF), cow manure compost (CM), pig manure compost (PM) and bio-organic fertilizer (BIO). The banana soil microflora was invested using plate-counting method and culture-dependent polymerase chain reaction denaturing gradient gel electrophoresis method (CD PCR-DGGE). Results showed that, compared with the other treatments, 2-year consecutive application of BIO significantly reduced the banana fusarium wilt disease incidence, and improved the banana mass per tree, crop yield, total soluble sugar content and the ratio of total soluble sugar to titratable acidity of fruits (sugar/acid ratio). Moreover, the analysis of culturable microflora showed that BIO application significantly increased the soil microbial biomass, soil culturable bacteria, bacillus and actinomycetes, and the ratio of bacteria to fungi (B/F) , while decreased the Fusarium oxysporum. Based on the CD PCR-DGGE results, the BIO application significantly altered the soil culturable bacterial structure and showed highest richness and diversity after 2 years of BIO application. The phylogenetic analysis of the selected bands showed that BIO application enriched the soil with the species of Paenibacillus sp., Burkholderia sp., uncultured Verrucomicrobia sp. and Bacillus aryabhattai, and depressed the species of Ralstonia sp., Chryseobacterium gleum, Fluviicola taffensis, Enterobacter sp. and Bacillus megaterium. These results confirmed that the continuous application of BIO effectively controlled the fusarium wilt disease, improved the crop yield and fruit quality, and modulated the soil culturable microflora under field condition.
authors.forename: Shu-tang
authors.initials: ST
authors.lastname: Zhong
authors.forename: Zong-zhuan
authors.initials: ZZ
authors.lastname: Shen
authors.forename: Yi-fei
authors.initials: YF
authors.lastname: Sun
authors.forename: Na-na
authors.initials: NN
authors.lastname: Lyu
authors.forename: Yun-ze
authors.initials: YZ
authors.lastname: Ruan
authors.forename: Rong
authors.initials: R
authors.lastname: Li
authors.forename: Qi-rong
authors.initials: QR
authors.lastname: Shen
mesh_terms: D000818:Animals; D001419:Bacteria; D018533:Biomass; D002417:Cattle; D005308:Fertilizers; D005670:Fusarium; D008372:Manure; D028521:Musa / Q000254:growth & development* / Q000382:microbiology; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D012987:Soil; D012988:Soil Microbiology; D013552:Swine
chemical_list: D005308:Fertilizers; D008372:Manure; D012987:Soil