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Effects of Sewage Irrigation on Rice Growth Condition in Paddy Soil

오수유입수 관개가 벼 생육환경에 미치는 영향

  • Kim, Jong-Gu (Honam Agricultural Research Institute, NICS, RDA) ;
  • Lee, Kyeong-Bo (Honam Agricultural Research Institute, NICS, RDA) ;
  • Park, Chan-Won (Honam Agricultural Research Institute, NICS, RDA) ;
  • Lee, Deog-Bae (Honam Agricultural Research Institute, NICS, RDA) ;
  • Kim, Seong-Jo (College of Life and Natural Resources, Wonkwang University)
  • 김종구 (호남농업연구소 식물환경과) ;
  • 이경보 (호남농업연구소 식물환경과) ;
  • 박찬원 (호남농업연구소 식물환경과) ;
  • 이덕배 (호남농업연구소 식물환경과) ;
  • 김성조 (원광대학교 생명과학대학)
  • Published : 2005.06.30

Abstract

This study was peformed to assess environmental effect through rice culture with sewage irrigation using Iksan stream water from 2002 to 2003. Contents of $NH_4-N$ in irrigation water keep up one day at the tillering stage and panicle formation stage were decreased 40% and 52% respectively, but that of continued 4 days was decreased $88%{\sim}98%$. The $NH_4-N\;and\;NO_3-N$ in run off by reduction 50% fertilization were more decreased 17% and 44% respectively, than those of conventional fertilization level. Amount of K and $NO_3-N$ loss in infiltration water were more decreased 18% and 4% respectively, those of than conventional fertilization level. The Cu and Pb contents in soil of after experiment were slightly increased but other heavy metals were not accumulated. The rice yield by reduction 50% fertilization level was not significant compare with conventional fertilization level but head rice rate was increased.

Keywords

sewage irrigation;rice culture;soil properties

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