Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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The Effect of Rice Farming on the Shallow Ground Water Quality

논농사가 천층지하수의 수질에 미치는 영향

  • Kang, Yun-Ju (Kyungpook Government Institute of Health and Environment) ;
  • Seo, Young-Jin (Kyungbuk Agricultural Technology Administration RDA) ;
  • Lee, Dong-Hoon (Department of Agricultural Chemistry, College of Agriculture, kyungpook National University) ;
  • Choi, Choong-Lyeal (Department of Agricultural Chemistry, College of Agriculture, kyungpook National University) ;
  • Park, Man (Department of Agricultural Chemistry, College of Agriculture, kyungpook National University) ;
  • Choi, Jyung (Department of Agricultural Chemistry, College of Agriculture, kyungpook National University)
  • Published : 2001.12.30
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Abstract

This study was conducted to investigate the effect of rice farming on seasonal, regional quality of shallow ground water. Ammonium $(NH_4\;^+)$ concentration of paddy soil was found to be the highest in April. Nitrate $(NO_3\;^-)$ concentration of soil and the ground water was determined to be lower during the growing period, May to August than any other periods. Seasonal change of K concentration in soils was shown to be in the tendency similar to that of $NH_4\;^+$. However, $Cl^-$ concentration of soils and the ground water was not changed significantly. $NH_4\;^+$, $NO_3\;^-$, K and $Cl^-$ concentration in W-3 ground water was higher than those of W-1 and W-2. It was clear that nutrients ($NH_4\;^+$, $NO_3\;^-$, K, $Cl^-$) should be leached from the adjacent soil to W-3 ground water by water stream. From this study it is apparent that nutrients can be easily leaching from sandy soils and transported into ground water, but rice plant farming is not non point source of groundwater pollution.

논농사가 천층(淺層)지하수의 수질에 미치는 영향을 조사하고자 지하수위가 다른 3곳을 선택하여 지하수의 수질과 그 위 논토양의 수용성 성분을 조사하였다. 토양중 암모니아이온은 4월에 농도가 비교적 높았고 그 후 감소하였다. 지하수 중 암모니아이온 역시 4월에 높았으며 그 후 감소하는 경향을 나타내었고 질산 이온은 $5{\sim}8$월에 감소되었다. 지하수위 별로는 지하수위가 낮은 W-3지역이 높았다. 토양중 칼륨의 농도는 깊이별로는 뚜렷한 경향이 없었으며 비료의 영향을 크게 받지 않는 편이었다. 지하수중의 칼륨함량은 지하수위가 낮은 W-3지역이 비교적 높았다. 토양 중 염소이온은 조사기간동안 비슷한 농도를 나타내었고 토양의 깊이에 따른 경향이 없었으며 지하수에서도 비슷한 경향이었다. 지하수에서의 PI지수는 4월에 증가했으나 이앙기 이후 감소하였고 지하수위가 낮은 W-3지역에서 높았으나 PI지수 2이하로 양호한 수질을 나타내었으며 논농사가 지하수의 오염에 크게 영향을 주지 않았다.

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