Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Effect of Surface Cover on the Reduction of NPS Pollution at a Vegetable Field

야채재배 밭에서 지표피복의 비점오염원 저감효과

  • Shin, Minhwan (Division of Agricultural Engineering, Kangwon National University) ;
  • Jang, Jeongryeol (Rural Research Institute, KRC) ;
  • Won, Chulhee (Division of Agricultural Engineering, Kangwon National University) ;
  • Choi, Younghun (Division of Agricultural Engineering, Kangwon National University) ;
  • Shin, Jaeyoung (Division of Agricultural Engineering, Kangwon National University) ;
  • Lim, Kyoung Jae (Division of Agricultural Engineering, Kangwon National University) ;
  • Choi, Joongdae (Division of Agricultural Engineering, Kangwon National University)
  • 신민환 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 장정렬 (한국농어촌공사 농어촌연구원) ;
  • 원철희 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 최용훈 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 신재영 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 임경재 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 최중대 (강원대학교 농업생명과학대학 지역건설공학과)
  • Published : 2012.05.30
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Abstract

This research was focused on the effect of rice straw and rice straw mat on the reduction of upland field non-point source (NPS) pollution discharges. Six experimental plots of $5{\times}22m$ in size and 3% in slope prepared on gravelly sandy loam soil were treated with control, rice straw cover and rice straw mat cover. Radish in Spring growing seasons were cultivated. NPS pollution discharge was monitored and compared with respect to the treatments. The surface cover rate of rice straw and rice straw mat right after the treatments was 64.7% and 73.7%, respectively. Rainfall of the 16 monitored events ranged from 12.8 mm to 538.2 mm. Runoff coefficient of the events was 0.01~0.67 in control plot, 0~0.63 in rice straw plot and 0~0.45 in rice straw mat plot. The reduction of runoff compared to the control plot was 5.4~99.7% in rice straw plot and 32.9~100% in rice straw mat plot. The reduction of NPS pollution load was 52.0% for SS, 28.5% for T-N and 35.2% for T-P in rice straw plot and 79.8% for SS, 68.3% for T-N and 53.3% for T-P in rice straw mat plot. This research revealed that rice straw mat cover on the soil surface could not only increase the crop yield and farmer's income but also reduce the NPS pollution loads significantly.

Keywords

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