Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Sulfate Reduction of Rice Paddy, Foreshore, and Reservoir Soil

논과 갯벌과 저수지 토양의 황산염 환원

  • 김민정 (한남대학교 생명나노과학대학 생명공학과) ;
  • 박경량 (한남대학교 생명나노과학대학 생명공학과)
  • Received : 2010.01.25
  • Accepted : 2010.08.17
  • Published : 2010.10.30
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Abstract

Sulfate reduction rates (SRR) using $^{35}SO_4^{-2}$, sulfide producing rates (SPR) using gas chromatography, the number of sulfate reducing bacteria (SRB) using the most probable number (MPN) method, and soil components (moisture, ammonium, total nitrogen, total organic carbon, total carbon, total inorganic phosphorus, total phosphorus, and sulfate) using standard methods in the organic/conventional rice paddy soils, cleaned/polluted reservoir soils, and cleaned/polluted foreshore soils were studied with the change of seasons. The average SRR was more related to the number of SRB and soil components (especially nitrogen and phosphorus) than sulfate concentration. SRR was also recorded to be highest in October soil samples. However, SPR was higher in foreshore soils containing a high concentration sulfate than in fresh water soils, and it was also recorded to be higher in the polluted areas than in clean areas. From these results, we can conclude that the SRR and SPR of anaerobic environments were affected by the number of SRB, soil components and temperature.

유기농법과 관행 농법토양, 청정 갯벌과 오염 갯벌토양 그리고 청정 담수와 오염 담수 토양을 이용하여 계절의 변화에 따라 $^{35}SO_4^{-2}$을 이용한 황산염 환원율, 가스크로마토그래피를 이용한 황화수소 생성량, 최적확수 시험법을 이용한 황산염 환원세균의 분포, 공정시험법을 이용한 수분, 암모니아, 총 질소, 총 유기탄소, 총 탄소, 총 무기인, 총 인, 황산염 농도의 토양 성분조사를 실시하였다. 그 결과 황산염 환원율은 황산염의 농도보다 황산염 환원세균의 군집크기와 질소와 인과 같은 토양 성분과 서로 밀접한 관련이 있는 것으로 확인되었다. 그리고 황화수소 생성량은 10월 토양에서 가장 높게 나타났으나, 담수 토양 보다는 높은 황산염 농도를 함유한 갯벌 토양에서 더 높게 나타났고, 청정 지역보다는 오염 지역 토양에서 높은 값을 나타냈다. 따라서 혐기환경의 황산염 환원율과 황화수소 생성량은 황산염 환원세균의 군집과 토양 내 여러 가지 성분 그리고 온도에 의해 영향 받는 것을 확인하였다.

Keywords

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