Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Impacts of Organic Farming System on the Soil Microbial Ecology in No-till Paddy

무경운 벼 유기농업이 토양 미생물 생태에 미치는 영향

  • Lee, Young-Han (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Ahn, Byung-Koo (Jeollabuk-do Agricultural Research and Extension Services) ;
  • Ahn, Youn-Sig (Department of Applied Biology, Gyeongsang National University)
  • Received : 2011.08.25
  • Accepted : 2011.09.22
  • Published : 2011.10.31
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Abstract

The seasonal changes were evaluated in the soil microbial populations by selected media in an organic farming system (OFS) with no-till management compared to those in a conventional farming system (CFS) with tillage and synthetic amendments in a flooded paddy from 2009 to 2010. The populations of aerobic bacteria and fungi in the OFS were significantly higher than those in the CFS at the harvesting stages, whereas those of Gram-negative bacteria was significantly higher in the OFS than in the CFS before the submerging stages. In addition, populations of aerobic bacteria, Gram-negative bacteria, and fungi tended to rapidly decreased after the submerging stages may be due to insufficient oxygen. Gram-negative bacteria should be considered as potential factor responsible for the microbial population differentiation observed between the OFS and the CFS in flooded paddy fields.

무경운 유기농업과 경운 관행농업의 벼 생육 단계별 토양 미생물 개체수 변화를 분석하였다. 수확기 토양의 호기성 세균 개체수와 곰팡이 개체수는 무경운 유기농업이 경운 관행농업 보다 유의적으로 많았으며 담수 이전 그람음성 세균 개체수도 경운 관행농업 보다 유의적으로 많았다. 호기성 세균, 그람음성 세균 그리고 곰팡이 개체수는 담수 이후 급격하게 감소하였다. 그람음성 세균 개체수는 무경운 유기농업과 경운 관행농업 토양 미생물 생태를 가장 잘 구분할 수 있는 특성을 보였다.

Keywords

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