Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Changes of Biomass of Green Manure and Rice Growth and Yield using Leguminous Crops and Barley Mixtures by Cutting Heights at Paddy

두과 녹비작물과 보리 혼파 이용 시 예취 높이에 따른 Biomass와 벼 생육 및 수량 변화

  • 전원태 (농촌진흥청 국립식량과학원) ;
  • 성기영 (농촌진흥청 국립식량과학원) ;
  • 오계정 (농촌진흥청 국립식량과학원) ;
  • 김민태 (농촌진흥청 국립식량과학원) ;
  • 이용환 (농촌진흥청 국립식량과학원) ;
  • 강위금 (농촌진흥청 국립식량과학원) ;
  • 이현복 (농촌진흥청 국립식량과학원) ;
  • 강항원 (농촌진흥청 국립식량과학원)
  • Received : 2012.02.15
  • Accepted : 2012.02.29
  • Published : 2012.04.30
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Abstract

The competition between green manure and forage crops frequently occurred at agricultural field because of soil fertility and livestock feeding selection. These experiments were carried out to evaluate the effects shoot and residue for green manure and forage production by leguminous crops and barley mixtures at paddy. Field experiments were conducted at paddy soil from 2008 to 2009. Treatments consisted of mixture and inter-seeding of barley and leguminous crops (hairy vetch and crimson clover). These treatments were divided into cutting height of 8 and 25 cm for using of green manure and forage at once. The residue biomass of 25 cm cutting height was higher than 8 cm and were no significantly between mixture and inter-seeding. However, residues of legume crop were significantly higher at inter-seeding than mixture. The shoot biomass of 8 cm cutting height was higher than 25 cm for forage using. The production of legume crop was high at the barley and hairy vetch seeding plot. The mixture of hairy vetch and barley showed the best biomass of shoot and residue for green manure and forage using at 25 cm of cutting height. Also this treatment could be possible to rice cultivation by no fertilization. Therefore, we suggested that 25 cm cutting of hairy vetch and barley mixture could be used for green manure and forage at the same time under rice-based cropping system.

본시험은 동작물 재배 시 두과녹비작물과 보리를 혼파하여 화학비료를 대체하고 예취 높이를 달리 하여 사료와 녹비를 동시에 이용하고자 2008년 10월에 두과녹비작물과 녹비보리를 혼합하여 부분경운파종으로 파종하였다. 처리내용은 녹비보리+헤어리베치와 녹비보리+CC (크림손클로버) 혼파와 녹비보리/헤어리베치와 녹비보리/CC (크림손클로버) 교호파종으로 구성하였다. 또한 녹비작물 재배 후 환원하기 전에 예취 높이를 8 cm, 25 cm 및 전량 환원구를 두었다. 예취 높이 8 cm와 25 cm 이상의 녹비작물은 제거 후 환원하였다. 잔존 녹비 환원은 2009년 5월 20일에 트랙터를 이용하여 로타리 경운으로 환원 후 6월 4일에 풍미벼를 중묘 기계 이앙하였다. 벼 재배 시 잔존 녹비이용구는 화학비료를 전혀 사용하지 않았고 관행시비구는 10a 당 질소, 인산, 칼리를 각각 9 kg, 4.5 kg, 5.7 kg을 시용하였다. 녹비로 이용 가능한 잔존 건물중은 예취 높이 25 cm구가 8 cm 구보다 높았으나 25 cm 구의 파종방법간에는 유의적 차이가 없었다. 두과 녹비작물의 잔존은 교호 파종구에 유의적으로 많이 잔존되었다. 사료로 이용가능한 지상부 건물중은 예취높이 8 cm 구가 25 cm 구보다 높았으며 녹비보리와 헤어리베치 8 cm 혼파구에서 가장 높았다. 두과 녹비작물의 건물중도 녹비보리와 헤어리베치 혼파구의 8, 25 cm 구에서 가장 많이 생산되었다. 잔존 녹비를 환원하여 벼를 재배한 결과 녹비보리와 헤어리베치 혼파 환원구의 25 cm 예취에서 관행시비 ($535.7kg\;10a^{-1}$)와 유의적 쌀수량 차이가 없었고 토양 유기물 함량이 약간 증가하고 물리성이 개선되는 결과를 보였다. 따라서 두과 녹비작물과 녹비보리를 혼파하여 녹비와 사료를 동시생산 및 벼 재배에 이용하기 위해서는 헤어리베치와 혼파하는 것이 좋을 것으로 판단되었다.

Keywords

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