한국토양비료학회지 (Korean Journal of Soil Science and Fertilizer)

  • 제42권4호
  • /
  • Pages.280-288
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  • 2009
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  • 0367-6315(pISSN)
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  • 2288-2162(eISSN)
한국토양비료학회 (Korean Society of Soil Science and Fertilizer)
권호 표지

우리나라 중서부 해안 경기만 간척지에서 식생 분포에 대한 토양 염도의 영향

Soil Salinity Influencing Plant Stands on the Reclaimed Tidal Flats of Kyonggi-Bay in the Midwestern Coast of Korea

  • 김은규 (죽전고등학교) ;
  • 천소을 (연세대학교 응용과학부 생물자원공학과) ;
  • 주영규 (연세대학교 응용과학부 생물자원공학과) ;
  • 정영상 (강원대학교 농업생명과학대학)
  • Kim, Eun-Kyu (Jukjeon High School) ;
  • Chun, Soul (Department of Bioresources and Technology, Yonsei University) ;
  • Joo, Young-K. (Department of Bioresources and Technology, Yonsei University) ;
  • Jung, Yeong-Sang (College of Agriculture and Life Science, Kangwon National University)
  • 투고 : 2009.07.06
  • 심사 : 2009.08.10
  • 발행 : 2009.08.28
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초록

간척지에서 식생의 공간적 분포 변이에 영향을 주는 요인을 알아내기 위하여, 중서부 해안 경기만의 신간척지와 간척연대가 다른 간척지 세 곳, 그리고 이들의 인근 비간척 간석지에서 식생 분포를 조사하였다. 토양 염도의 지표로 포화침출액의 전기전도도를 조사하였다. 토양염도에 따라 식생 분포가 확연이 달랐다. 토양 염도에 따라 각 식생의 최적 서식지가 존재하며, 이는 저염도 지점에는 중성 식물이, 고염도 지점에는 염생식물이 분포함을 의미하고 있다. 서식 식물 군집에 따른 토양 염도의 순서는 다음과 같다. 즉, 토양 염도는 식생 위조지>선구 염생식물지> 혼합선구염생식물지> 선구염생식물지> 선구염생식물 및 통성 염생식물 혼합지> 혼합 통성염색식물지> 통성염생식물 및 중성식물 혼합지>혼합 중성식물지의 순이었다. 이 결과는 토양 염도의 공간적 토양 구배에 따라 식물 종의 분포가 이루어짐을 보여 주고 있으며, 이에 따라 식물종의 분포에 따라 토양 염도의 차이를 판단할 수 있음을 시사하고 있다. 토양 염도와 식물종의 분포양상 관계는 여러 간척지간에 큰 차이를 보이지 않았고, 식물 군락 밀집도가 간척 이후 식생이 어떤 방향으로 천이되는지의 지표를 제시하여주고 있다.

To identify controlling factors for spatial variation of vegetation in reclaimed tidal flats, plant stands were investigated in a newly reclaimed as well as three matured tidal flats, and a natural tidal flat in the midwest coast of Korea. Electrical conductivity of saturated soil extract (ECe) was measured to assess soil salinity. Soil salinity differed significantly among plant stands. Depending on soil salinity, plant species showed different niches: glycophyte predominated low saline spots, halophyte predominated high saline spots. Soil salinity for each plant habitats was in order of as follow: bare soil or plant wilted > mixed pioneer halophyte > pioneer halophyte > mixed with pioneer halophyte and facultative halophyte > mixed facultative halophyte > facultative halophyte > mixed with facultative halophyte and glycophyte > glycophyte > mixed glycophyte stands. These results suggested that plant distribution might have been influenced by spatial edaphic gradient (soil salinity), and thus it could be utilized as an indicator for field soil salinity gradient. Relationship between soil salinity and plant distribution was not different among the aged reclaimed tidal flats, suggesting that the vegetative population might have changed into a similar direction since the reclamation.

키워드

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