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경남지역 과수원 토양 미생물 군집 비교

Comparison of Microbial Community of Orchard Soils in Gyeongnam Province

  • Lee, Young-Han (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Lee, Seong-Tae (Gyeongsangnam-do Agricultural Research and Extension Services)
  • 투고 : 2011.05.17
  • 심사 : 2011.06.04
  • 발행 : 2011.06.30

초록

경남지역 과수원 토양 25개소를 대상으로 2010년에 미생물 군집을 분석하고 토성, 지형 및 작물별 주요 변동요인을 주성분 분석으로 해석하였다. 경남지역 과수원 토양 평균값은 총 FAME 함량이 $332nmol\;g^{-1}$이었으며 총 세균 함량은 $94nmol\;g^{-1}$, 그람음성 세균 함량은 $46nmol\;g^{-1}$, 그람양성 세균은 $42nmol\;g^{-1}$, 방선균 함량은 $4.8nmol\;g^{-1}$, 곰팡이 함량은 $54nmol\;g^{-1}$, 내생균근균 함량은 $9.1nmol\;g^{-1}$ 이었다. 미생물의 환경스트레스 지수인 토양 cy19:0과 18:$1{\omega}7c$ 비율은 사양토에서 0.36으로 양토 0.80 보다 유의적으로 낮아 (p<0.05) 토양 미생물의 스트레스가 적었다. 과수원 토양 평균 미생물은 총 세균이 28.1%, 곰팡이 15.9%, 그람음성 세균은 13.6%, 그람양성 세균은 12.5%, 내생균근균 2.8%, 방선균 1.4%의 비율을 나타냈다. 복숭아 재배지의 토양 그람음성 세균 군집은 15.2%로서 배 재배지 12.8%에 비해 유의적으로 높은 비율을 나타냈다 (p<0.05). 주성분 분석결과 지형, 토성, 작물별 유의적인 차이가 없었으며 토양 미생물 군집의 다양성을 관리하기 위해 지속적인 모니터링이 필요할 것으로 생각된다.

Soil management for orchard depends on the effects of soil microbial activities. The present study evaluated the soil microbial community of 25 orchard in Gyeongnam Province by fatty acid methyl ester (FAME) method. The average concentrations in the orchard soils were $332nmol\;g^{-1}$ of total FAMEs, $94nmol\;g^{-1}$ of bacteria, $46nmol\;g^{-1}$ of Gram-negative bacteria, $42nmol\;g^{-1}$ of Gram-positive bacteria, $4.8nmol\;g^{-1}$ of actinomycetes, $54nmol\;g^{-1}$ of fungi, and $9.1nmol\;g^{-1}$ of arbuscular mycorrhizal fungi. In addition, sandy loam soils had significantly low ratio of cy19:0 to 18:$1{\omega}7c$ compared with that of loam soils (p<0.05), indicating that microbial stress decreased. The average soil microbial communities in the orchard soils were 28.1% of bacteria, 15.9% of fungi, 13.6% of Gram-negative bacteria, 12.5% of Gram-positive bacteria, 2.8% of arbuscular mycorrhizal fungi, and 1.4% of actinomycetes. The soil microbial community of Gram-negative bacteria in peach cultivating soils was significantly higher than that of pear cultivating soils (p<0.05).

키워드

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