Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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A Taxonomical Consideration based on Changes of Salinity and Profile Features of the Texturally Different Two Reclaimed Tidal Soils

간척지 염해답토양의 토성별 제염기간 및 단면특성변화를 기준한 분류학적 고려

  • Received : 2006.01.23
  • Accepted : 2006.04.11
  • Published : 2006.04.30
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Abstract

To analyze the changes of soil physico-chemical properties after reclamation, we carried out an experiment for 75 samples of representative saline soils in South Korea. The more the years after reclamation is proceeded, the blighter the soil color is, soil horizon differentiation and structure is developed, but electrical conductivity(EC) decreased. After the soil survey, coarse textured soils were more quickly de-salined than the fine textured soils. In case of fine loamy textured Poseung series, it could be estimated that the series had Salic horizons in sub-order level of taxonomical classification. In other case of coarse loamy textured soil series, it could be estimated that the series had Sodic properties in sub-group level. Sodium contents of fine loamy textured soils were not decreased after reclamation, but those of coarse loamy textured Gwanghwal series reclaimed about 76 years ago were reclassified because of desalinization. To be desalined low to 4 dSm-1 of EC, it presumably takes about 108, or 12 years for fine loamy and coarse loamy textured soils, respectively.

중부 서해안에 분포하는 염해답으로 분류되어 있는 토양에서 간척 후 경작년대의 진척에 따른 토양 특성변화를 구명하고, Soil Taxonomy 분류에 따른 문제점을 검토하며, 염해답에서의 제염 소요년수를 추정한 결과는 다음과 같았다. 1. 간척년대가 오래될수록 토색이 밝아지고, 층위가 발달되며, 토양구조의 형성이 진전되는 경향이며, EC는 감소되는 경향이었다. 2. 식양질인 포승통의 경우 분류기준에 따라 분석한 결과를 Salic 층위를 가지고 있는 것으로 판단되었으며, 광활통 등 사양질 토양의 경우에는 아군단위에서의 sodic 특성을 가지고 있는 것으로 판단되었다. 3. Soil Taxonomy 분류기준을 적영하여 분석하였을때에는 식양질 토양에서는 간척년대가 지속되어도 Na 함량이 기준 이하로 떨어지지 않았으며, 사양질 토양에서는 재배를 시작한지 76된 김제시 광활면 지역에 분포하는 토양에서만 Na 함량이 기준 이하로 떨어져 사질답이라 할 수 있었다. 4. 이용 측면에서 염농도의 피해 기준을 dSmX로 판단할 때 식양질토양은 제염이 되는데 약 108년정도가 소요되었으며 사양질 토양에서는 12년 정도가 소요되었다.

Keywords

References

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