Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

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

Relationship Between Soil Water-Stable Aggregates and Physico-chemical Soil Properties

토양 내수성 입단과 토양특성과의 관계

  • Hyun, Byung-Keun (National Institute of Agricultural Science and Technology) ;
  • Jung, Sug-Jae (National Institute of Agricultural Science and Technology) ;
  • Song, Kwan-Cheol (National Institute of Agricultural Science and Technology) ;
  • Sonn, Yeon-Kyo (National Institute of Agricultural Science and Technology) ;
  • Jung, Won-Kyo (National Institute of Agricultural Science and Technology)
  • 현병근 (농업과학기술원 토양관리과) ;
  • 정석재 (농업과학기술원 토양관리과) ;
  • 송관철 (농업과학기술원 토양관리과) ;
  • 손연규 (농업과학기술원 토양관리과) ;
  • 정원교 (농업과학기술원 토양관리과)
  • Received : 2007.01.19
  • Accepted : 2007.02.12
  • Published : 2007.02.28
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Abstract

Soil aggregation has been considered as an important factor not only for increasing soil productivity and soil quality but also improving nutrient use availability and water use efficiency. However, the relationship between soil aggregation and soil properties hasn't well reported for Korean soils. Objective of this research was to identify the relationship among soil water-stable aggregate (WSA), soil properties and soil dispersion ratio. Soil samples were analyzed for water-stable aggregate, Middleton's dispersion ratio, and soil physical and chemical properties. Water-stable aggregate was significantly correlated to soil textural properties, soil organic matter, and exchangeable cations. Middleton's dispersion ratio was significantly correlated with water-stable aggregate ($r=-0.76^{***}$). Regression equation for water-stable aggregate was estimated by Middleton's dispersion ratio (Y=-0.79X + 96.49; $r^2=0.58^{**}$). In this research, we conclude that water-stable aggregate was significantly correlated with some soil properties and was able to be estimated by rapid and easily measurable Middleton's dispersion ratio.

토양의 입단은 토양의 물리적 구조를 형성함에 있어서 매우 중요한 특성이며 토양의 양분 및 수분의 이동 및 토양관리방법 등과 매우 밀접한 연관이 있다. 그러나 토양의 입단과 토양특성에 대한 상호관계에 관한 연구가 매우 미흡하다. 본 연구에서는 토양의 내수성 입단과 토양 물리화학적 특성관계를 구명하고자 토양의 토양물리 화학성과 함께 내수성 입단을 측정하여 상관관계를 분석한 결과, 토양의 내수성 토양입단형성에 미치는 토양물리성 입자 중 미사($r=0.82^{***}$)와 점토($r=0.75^{***}$) 함량은 유의성이 있는 정의 상관을 보였으며, 모래($r=-0.82^{***}$)는 유의성 있는 부의 상관을 나타내었다. 토양화학적 특성은 Ca > Mg > CEC > OM > K > Al 순으로 내수성 토양입단 함량과 통계적으로 유의한 상관성을 나타내었다. Middleton의 분산율 (0.05mm 이하)과 내수성 토양입단함량과는 통계적으로 유의한 상관 ($r=-0.76^{***}$)을 나타내었다. 내수성 입단 함량 추정을 위한 Middleton의 분산율의 유의한 회귀모형이 산출되었다 (Y=-0.79X+96.49; $r^2=0.58^{**}$). 결론적으로, Middleton의 분산율을 이용하여 토양의 내수성 토양 입단함량을 간편하고 빠르게 측정할 수 있었다.

Keywords

References

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