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Fate of Nitrogen and Phosphorous in Hydroponic Waste Solution Applied to the Upland Soils

시설하우스 폐양액의 토양 처리에 따른 질소 및 인의 이동

  • Yang, Jae-E. (Division of Biological Environment, Kangwon National University) ;
  • Park, Chang-Jin (Central Research Institute, KT&G) ;
  • Yoo, Kyung-Yoal (Division of Biological Environment, Kangwon National University) ;
  • Kim, Kyung-Hee (Gangwon Agricultural Research and Extension Services) ;
  • Ok, Yong-Sik (Division of Biological Environment, Kangwon National University)
  • 양재의 (강원대학교 자원생물환경학과) ;
  • 박창진 (KT&G 중앙연구원) ;
  • 유경열 (강원대학교 자원생물환경학과) ;
  • 김경희 (강원도 농업기술원) ;
  • 옥용식 (강원대학교 자원생물환경학과)
  • Published : 2005.06.30

Abstract

Objective of this research was to evaluate the fate of nitrogen and phosphorous in hydroponic waste solution from the plastic film house cultivation applied to the upland soil by column leaching and field experiment. The pH and EC of leachate were decreased by the reaction with the upland soil in the column leaching experiment. The EC and concentrations of $H^+,\;K^+,\;and\;{NH_4}^+$ of leachate were decreased as the column length (soil depth) was increased. But these were increased as the amounts of the hydroponic waste solution were increased field experiment growing red pepper (Capsicum annum L.) to monitor the nutrients movement using ion exchange resin capsule demonstrated that the nutrient concentration of soil solution was increased in the orders of $PO_4-P. Nitrate concentration of resin capsule inserted into the soil was relatively higher than other nutrients $(NH_4-N\;and\;PO_4-P)$ at the 45 cm of soil depth. The overall results demonstrated that the hydroponic waste solution could be recycled as plant nutrients to enhance fertility of soils. But nitrate leaching was a major factor for safe use of the hydroponic waste solution in soil.

Keywords

hydroponic waste solution;nutrient;nitrate;column leaching;ion exchange resin capsule

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