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Changes in microbial community of agricultural soils subjected to organic farming system in korean paddy fields with no-till management

  • Environmental Science
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Abstract

Soil management for organic farming depends on the effects of soil microbial activities and aggregation. The seasonal changes were evaluated in the soil microbial community by fatty acid methyl ester (FAME) and total glomalin analysis in an organic farming system (OFS) with no-till management compared to those in a conventional farming system (CFS) with tillage and chemical amendments in a flooded paddy. The average concentrations of individual FAMEs and glomalin in the OFS were significantly higher than those in the CFS during rice-growing stages (p<0.001). OFS had significantly lower ratio of cy17:0/16:1ω7c and higher ratio of monounsaturated fatty acids to saturated fatty acids compared with those of CFS (p<0.001), indicating that microbial stress decreased due to organic soil inputs and the lack of chemical amendments, whereas communities of Gram-negative bacteria in OFS soils were significantly larger than those in CFS soils (p<0.001). Gram-negative bacteria should be considered as potential factor responsible for the clear microbial community differentiation observed between the OFS and the CFS in flooded paddy fields.

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Authors and Affiliations

  1. Division of Plant Environmental Research, Gyeongsangnam-do Agricultural Research and Extension Service, 660-370, Jinju, Republic of Korea

    Young Han Lee

  2. Division of Applied Life Sciences (BK21 Program), Gyeongsang National University, 660-701, Chinju, Republic of Korea

    Han Dae Yun

  3. Research Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Chinju, Republic of Korea

    Han Dae Yun

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  1. Young Han Lee
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  2. Han Dae Yun
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Correspondence to Han Dae Yun.

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Lee, Y.H., Yun, H.D. Changes in microbial community of agricultural soils subjected to organic farming system in korean paddy fields with no-till management. J. Korean Soc. Appl. Biol. Chem. 54, 434–441 (2011). https://doi.org/10.3839/jksabc.2011.067

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  • DOI: https://doi.org/10.3839/jksabc.2011.067

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