한국농공학회논문집 (Journal of The Korean Society of Agricultural Engineers)

  • 제53권6호
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  • Pages.67-74
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  • 2011
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  • 1738-3692(pISSN)
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  • 2093-7709(eISSN)
한국농공학회 (The Korean Society of Agricultural Engineers)
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논과 밭 지하수의 영양물질 농도 특성

Characteristics of Nutrient Concentrations in Groundwater under Paddy and Upland Fields

  • 장훈 (한국수자원공사 한강통합물관리센터) ;
  • 김진수 (충북대학교 농업생명환경대학 지역건설공학과) ;
  • 김영현 (충북대학교 농업생명환경대학 지역건설공학과) ;
  • 송철민 (팔당호수질정책협의회)
  • 투고 : 2011.04.18
  • 심사 : 2011.11.01
  • 발행 : 2011.11.30
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초록

The objective of this study was to compare concentrations of nutrients such as total nitrogen (TN), nitrate nitrogen ($NO_3$-N) total phosphorous (TP), and phosphate phosphorous ($PO_4$-P) in groundwater under paddy and upland fields, and surface water recharging from a rural mixed land-use watershed. Chinese cabbage and hot pepper were cultivated on the upland field plot. The TN concentrations in upland groundwater showed double peaks (4.7, 4.3 mg/L, respectively) in April 2009 shortly after fertilizer application, indicating that TN concentrations are greatly influenced by fertilization. However, the TN concentrations in paddy groundwater were always lower than 2.0 mg/L irrespective of fertilization. Whereas the mean concentrations of TN and $NO_3$-N in upland groundwater significantly (p<0.05) higher than those in surface water, the mean concentrations of TP and $PO_4$-P in upland groundwater were significantly lower than those in surface water. On the other hand, the mean concentrations of TN, $NO_3$-N, TP and $PO_4$-P in paddy groudwater were significantly (p<0.05) lower than those in surface water. The TN concentrations in upland groundwater were generally higher than those in surface water during early April to early December due to the effect of fertilization, but vice versa in the other periods. In contrast, the TP concentrations in upland groundwater were always lower than those in surface water due to the sorption of inorganic phosphorous by soil. Moreover, the TN and TP concentrations in paddy groundwater were always lower than those in surface water, and therefore paddy groundwater may dilute nutrient concentrations in surface water when paddy groundwater and surface water mix.

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참고문헌

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피인용 문헌

  1. Nutrient Balance in the Paddy Fields Watershed with a Source of River Water vol.56, pp.5, 2014, https://doi.org/10.5389/KSAE.2014.56.5.011