한국토양비료학회지 (Korean Journal of Soil Science and Fertilizer)

  • 제41권3호
  • /
  • Pages.184-189
  • /
  • 2008
  • /
  • 0367-6315(pISSN)
  • /
  • 2288-2162(eISSN)
한국토양비료학회 (Korean Society of Soil Science and Fertilizer)
권호 표지

광산인근 논토양의 카드뮴 존재형태와 쌀의 카드뮴의 함량과의 관계

Relationship between Fraction of Cd in Paddy Soils near Closed Mine and Cd in Polished Rice Cultivated on the same Fields

  • 김원일 (농업과학기술원 유해물질과) ;
  • 박병준 (농업과학기술원 유해물질과) ;
  • 박상원 (농업과학기술원 유해물질과) ;
  • 김진경 (농업과학기술원 유해물질과) ;
  • 권오경 (농업과학기술원 유해물질과) ;
  • 정구복 (농촌진흥청 연구개발과) ;
  • 이종근 (고려대학교 환경생태공학부) ;
  • 김정규 (고려대학교 환경생태공학부)
  • 투고 : 2008.05.08
  • 심사 : 2008.05.28
  • 발행 : 2008.06.30
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초록

To assess the relationship between Cd fraction in paddy soils and Cd in polished rice, soils and rice were analyzed at the 3 Cd contaminated paddy fields near closed mines. Major Cd fractions of A field were organically bound (62.6%) and Fe-Mn oxide bound (25.3%) forms. In case of B field, major Cd fractions of B1 field were carbonate bound (46.3%) and Fe-Mn oxide bound (31.6%) form whereas B2 field were residual (54.3%) and carbonate bound (21.8%) form, respectively. It showed a huge difference of Cd fraction each other. 0.1M HCl extractable Cd in soil was positively correlated with Cd in rice. Specially, the ratios of 0.1M HCl extractable Cd against total Cd content in soils were 13.7%, 2.6%, and 0.45% in A, B1, and B2 fields, respectively. These ratio were largely affected with Cd uptake to rice grain. Also, exchangable, Fe-Mn oxide bound, and carbonate bound form, which are partially bioavailable Cd fraction to the plant, were positively correlated with Cd in rice while organically bound and residual form was not correlated. Multiple regression equation was developed with Rice Cd = -0.02861 + 0.07456 FR 1(exchangeable) + 0.00252 FR 2(carbonate bound) + 0.001075 FR 3(Fe Mn oxide bound) - 0.00095 FR 4(organically bound) - 0.00348 FR 5(residual) ($R^2=0.7893^{***}$) considering Cd fraction in soils.

키워드

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