Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Variations of Dissolved and Total Phosphorus Concentrations in Irrigation, Flooding, and Drainage Water of Paddy Fields

논 관개수, 담수 및 유출수의 용존인과 총인 농도 변화

  • Choi, Dongho (Climate Change and Agroecology Division, National Academy of Agricultural Science) ;
  • Cho, Sohyun (Yeongsan River Environment Research Center) ;
  • Jung, Jaewoon (Jeollanamdo Environmental Industries Promotion Institute) ;
  • Park, Hyunkyu (Department of Rural & Bio-systems Engineering, Chonnam National University) ;
  • Choi, Woojung (Department of Rural & Bio-systems Engineering, Chonnam National University) ;
  • Yoon, Kwangsik (Department of Rural & Bio-systems Engineering, Chonnam National University) ;
  • Kim, Youngsuk (Yeongsan River Environment Research Center)
  • 최동호 (농업과학원 기후변화생태과) ;
  • 조소현 (국립환경과학원 영산강물환경연구소) ;
  • 정재운 (전라남도 환경산업진흥원) ;
  • 박현규 (전남대학교 지역.바이오시스템공학과) ;
  • 최우정 (전남대학교 지역.바이오시스템공학과) ;
  • 윤광식 (전남대학교 지역.바이오시스템공학과) ;
  • 김영석 (국립환경과학원 영산강물환경연구소)
  • Received : 2016.05.25
  • Accepted : 2017.07.06
  • Published : 2017.07.30
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Abstract

In order to understand the characteristics of phosphorus in the paddy field, this study analyzed $PO_4-P$ and T-P concentrations of irrigation water, flooding water, and runoff from 2008 to 2010. The variation of phosphorous form within hydrologic cycle around the rice paddy field was investigated using the ratio of $PO_4-P$ to TP. In addition, the correlation between pH, EC, and DO in flooding water was analyzed and the factors affecting phosphorus form in paddy field were investigated. The concentration of T-P in flooding water was high during the survey period, and the concentration of T-P in runoff was assumed to be decreased by dilution due to irrigation and rainfall. On the other hand, the ratio of $PO_4-P$ to T-P was lower in flooding water than those of irrigation water and runoff, which was interpreted to be due to the fact that the phosphorus fertilizer was applied in the paddy field but the adsorption was rapidly occurred to the paddy field by the soil. The similar proportions of $PO_4-P$ to T-P in flooding water and runoff suggest that the form of phosphorus outflowed from the paddy is influenced by the form of phosphorus in the flooding water of paddy field. In addition, DO concentration in flooding water showed negative correlation with the concentrations of $PO_4-P$ and T-P. The effort to survey frequent irrigation water quality data is required for the analysis of phosphorus behavior in the paddy water system since concentration of phosphorous and DO in irrigation water would influence rhe form of phosphorous in flooding water and subsequent runoff.

Keywords

References

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