Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effect of Green Manure Hairy vetch on Rice Growth and Saving of Irrigation Water

녹비작물 헤어리베치가 벼 생육 및 관개량 절약에 미치는 효과

  • 전원태 (농촌진흥청 국립식량과학원) ;
  • 허승오 (농촌진흥청 연구정책국) ;
  • 성기영 (농촌진흥청 국립식량과학원) ;
  • 오인석 (농촌진흥청 국립식량과학원) ;
  • 김민태 (농촌진흥청 국립식량과학원) ;
  • 강위금 (농촌진흥청 국립식량과학원)
  • Received : 2011.03.17
  • Accepted : 2011.04.15
  • Published : 2011.04.30
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Abstract

Green manure crops are primarily used to reduce the application of chemical fertilizers. In this study, a two-year field experiment was conducted to evaluate the effects of green manure hairy vetch on rice growth and saving of irrigation water. This experiment was conducted at Sinheung series (fine loamy, mixed, nonacid, mesic family of Fluvaquentic Endoaquepts) from 2008 to 2009 at the National Institute of Crop Science (NICS), RDA, Suwon, Gyeonggi province, Korea. Hairy vetch as a green manure crop was incorporated in soil for rice cultivation. Chemical fertilizers had not been applied to hairy vetch plot. Treatments included once irrigation (OI) per week and conventional irrigation (CI). In 2008, the water use efficiency of OI increased by 46% compared to CI by hairy vetch application during rice cultivation season (water treatments were started 38 days after rice transplanting). In 2009, the water use efficiency of OI increased by 61.3% compared to CI by hairy vetch application during rice cultivation season (water treatments were started 30 days after rice transplanting). Soil physical properties such as bulk density, soil porosity ratio and glomalin contents were improved by the incorporation of hairy vetch. The rice yield of OI water management was not significantly different from those of CI water management by hairy vetch application both years. These results suggest that the OI water management with hairy vetch incorporated in soil for rice cultivation can be used in rice fields to reduce the amount of irrigation water and chemical fertilizer.

녹비작물 헤어리베치를 이용하여 벼 재배 시 물 절약 기술을 개발하고자 2008년부터 2009년까지 경기도 수원시에 소재한 농촌진흥청 국립식량과학원 벼 시험포장 신흥통에서 수행하였다. 물관리 처리 내용은 관행시비구와 헤어리베치 투입구 내에 관행물관리구 (주 2~3회)와 주1회관개구를 설치하여 벼 이앙 후 30~38일부터 관개량, 벼 생육, 수량 및 수량구성요소, 토양물리성 변화를 조사하였다. 벼 유수형성기와 유숙기의 생육은 2년 모두 헤어리베치 투입구의 주1회 관개구가 관행시비구의 주1회관개구보다 양호하게 경과하였다. 관개량은 관행시비구의 관행물관리구에 비하여 헤어리베치 투입구의 주1회관개구가 2008년은 46.0%, 2009년 61.3%로 절감되었다. 벼 수량 및 수량구성요소도 2개년 모두 관행시비구의 물관리에 비하여 헤어리베치 투입구의 주1회 관개구와 유의적 차이가 없었다. 또한 헤어리베치 투입구에서 벼 수확 후 토양의 용적밀도가 감소하고 공극률이 증대하였다. 물리성 개선의 지표물질인 glomalin의 함량도 헤어리베치 투입구에서 증가하는 경향을 보였다. 따라서 헤어리베치 투입 후 주 1회만 관개하여도 토양물리성이 개선되고 보수력이 증대되어 벼 수량의 감수 없이 절수 재배가 가능하여 벼 재배 시 물 절약이 가능할 것으로 사료되었다.

Keywords

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