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Different carbonic supplements induced changes of microflora in two types of compost teas and biocontrol efficiency against Pythium aphanidermatum

Haibin Wang,Jian Ding,Shi-Wei Liu,X. Bai,L. Xue

Published 2019 in Biocontrol science and technology (Print)

ABSTRACT

ABSTRACT Considering the different carbonic source utilisation abilities of microbial species, we used six carbonic supplements to acclimate the microorganisms in two types of compost teas (named CT1 and CT2). The effects of the different carbonic supplements on the physicochemical and biological parameters of the acclimated microbial broth were investigated. The influence of these supplements on the biocontrol effect of the broth against cucumber damping off caused by Pythium aphanidermatum was also assessed. Results showed that treatment with glucose, sucrose, or starch reduced the pH and weakened the biocontrol effect of the acclimated microbial broth. The glucose treatment increased the population size of fungi and yeast. The chitin, cellulose, and wheat straw treatments significantly elevated the pH and electrical conductivity (P < 0.05), increased the bacterial population size, and positively affected the biocontrol effect of the acclimated microbial broth. The glucose treatment had higher (75.3% and 79.4% for the CT1 and CT2, respectively) whereas the wheat straw treatment had lower (34.6% and 25.6% for the CT1 and CT2, respectively) disease incidence relative to the blank control (85.6%), bacterial population size (r = 0.64 and 0.69) and number of colony types (r = 0.82 and 0.76) highly correlated with the biocontrol effect of CT1 and CT2 while the reducing sugar content negatively correlated with the biocontrol effect (r = −0.57 and −0.86).

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Biocontrol science and technology (Print)

  • Publication date

    2019-05-28

  • Fields of study

    Agricultural and Food Sciences, Biology, Environmental Science

  • Identifiers
    DOI 10.1080/09583157.2019.1625027
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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