Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effects of Cover Plants on Soil Microbial Community in a Organic Pear Orchard

  • Oh, Young-Ju (Institute for Future Envionmental Ecology Co., Ltd.) ;
  • Sohn, Soo-In (National Academy of Agricultural Science) ;
  • Song, Yang-Ik (Apple Research Station, National Institute of Horticultural & Herbal Science) ;
  • Kang, Seok-Boem (Citrus Research Station, National Institute of Horticultural & Herbal Science) ;
  • Choi, Jin-Ho (Pear Research Station, National Institute of Horticultural & Herbal Science)
  • Received : 2013.10.10
  • Accepted : 2014.01.21
  • Published : 2014.02.28
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Abstract

Due to recent interest of the consumers on safe farm products and the government's political support for eco-friendly agriculture, organic fruit production has been growing continuously. This research was conducted in order to study the effect of cover plants on soil microbial community on cover plants and establish an organic fruit cultivation method through choosing optimal cover plant. As a result of investigating soil microbial population density, the bacterial density in soil showed an increasing trend in June compared to April, and there was a decreasing trend in bacterial density of the soil in August compared to June. The density of actinomycetes in soil increased around 1.6 times in June compared to April when the soil was covered with hairy vetch. The increase of filamentous fungus in crimson clover group was 6.1 times higher in June compared to April and in hairy vetch group, the increase was 4.9 times higher in June compared to April. As a result of analyzing DNA extracted from the soil categorized by different types of cover plants using DGGE method, soil collected from April had higher number of bands detected from different locations according to different types of cover plants. Diversity of the bands from the soil collected from August showed higher range of reduction. As a result of analyzing soil microbial community by different period and the types of cover plants using Pyrosequencing method, microbes were detected in the order of Proteobacteria, Acidobacteria, Actinobacteria, Bacteroidetes, Chloroflexi, and Firmicutes. Distribution rate of Firmicutes increased in the soil collected in August compared to June and this was shown in all types of cover plants by twice the amount.

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References

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