Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
권호 표지

Vegetation Distribution and Soil Salinity on Daeho Reclaimed Tidal Land of Kyonggi-Bay in the Mid-West Coast of Korea

우리나라 중서부 서해안 대호 간척지의 식생 분포와 토양 염농도

  • Kim, Eun-Kyu (Jukjeon Highschool) ;
  • Jung, Yeong-Sang (Department of Biological Environment, Kangwon National University) ;
  • Joo, Young K. (Department of Bioresources and Technology, Yonsei University) ;
  • Jung, Hyeung-Gun (Department of Environmental Engineering, Yonsei University) ;
  • Chun, Soul (Department of Bioresources and Technology, Yonsei University) ;
  • Lee, Sung-Hun (Rural Research Institute, Korea Rural Community Cooperation)
  • Received : 2009.11.17
  • Accepted : 2009.12.08
  • Published : 2009.12.30
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Abstract

Vegetation distribution and soil salinity were surveyed on the conservation plot in the Daeho reclaimed tidal land, in where the plants species distribution was more various than a periodically inundated tidal flat and the early stage of reclamation. According to the soil salinity where the vegetation patches were occurred, the mono patches of Salicornia europaea, Suaeda maritima, and Suaeda glauca were distributed in the average range of 31.05 dS/m in soil salinity, the mixed patches of them were distributed in the average range of 42.75 dS/m. Therefore, Salicornia europaea, Suaeda maritima, and Suaeda glauca showed strong salt tolerance. The mono patches of Aster tripolium, Sonchus brachyotus, and Scirpus planiculm were distributed in the range of 11.73 dS/m in soil salinity, and the mixed patches were distributed in the average range of 9.43 dS/m. Therefore Aster tripolium, Sonchus brachyotus, and Scirpus planiculmis showed moderate salt tolerance. The mono patches of Imperata cylindrica, Trifolium pratense, Miscanthus sinensis, Setaria viridis, and Trisetum bifidum were distributed in the range of 2.42 dS/m in soil salinity. These species showed characteristics of glycophytes with weak salt tolerance. The distribution of vegetation patches was influenced by the soil salinity as pioneer halophytes patches occurred at higher soil salinity zone than facultative halophytes patches, glycophytes patches occurred at lower soil salinity zone than facultative halophytes. These results suggested that occurrence of plant species and plant distribution type might be useful index to evaluate the soil salinity and desalinization in the reclaimed land of the midwest coastal area of Korea.

간척지에서 식생의 분포와 토양 염농도 간의 관계를 분석하기 위하여, 간척 후 교란이 없는 대호 간척지의 식생보전지구에서 본 연구를 수행하였다. 출현 식물 종을 분류하고, 집락 유형별로 토양 염농도를 측정하여 비교하였고, 식생도를 작성하였다. 대호 간척지의 식물 종은 주기적인 침수가 이루어지는 갯벌 및 초기 간척지에 비해 매우 다양하였다. 출현한 식물 집락은 단일 종으로 이루어진 순수 집락과 여러 종의 혼합으로 이루어진 혼생 집락으로 구분되었다. 식물 집락별 출현지의 토양 염농도에 근거할 때 퉁퉁마디, 해홍나물 및 나문재의 단일 집락은 토양 염농도가 31.05 dS/m 정도인 곳에, 이들의 혼생 집락은 42.75 dS/m에 출현하여 내염성이 강하였고, 사데풀, 갯개미취, 새섬매자기 등의 단일집락은 11.73 dS/m 인 곳에, 이들의 혼생집락은 9.43 dS/m 정도인 곳에 출현하여 저염생식물군의 특성을 보였고, 띠, 레드클로버, 억새, 강아지풀 및 잠자리피의 단일집락은 2.42 dS/m 정도인 곳에 분포하여 내염성이 약한 중성식물군의 특성을 보였다. 이와 같이 식물 집락의 분포는 토양 염농도의 영향을 받고 있어, 간척지 토양의 염농도는 식물 집락 분포의 제한요소로 작용함을 보였다. 이 결과는 토양 염농도에 따라 다르게 나타나는 식물 종과 식물 집락의 분포 양상이 간척지 토양의 탈염화 지표로 유용함을 시사하고 있다.

Keywords

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