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Application of Molybdenum Enhances Nitrogen Fixation and Transfer, and Biomass Production under a Hairy Vetch/Barley Mixture Cropping System

풋거름 보리-헤어리베치 혼파 작부체계에서 몰리브덴 시용이 질소 고정, 이동 및 수량에 미치는 영향

  • Kim, Tae-Young (Division of Applied Life Science (BK21 Plus), Gyeongsang National University) ;
  • Kim, Song-Yeob (Division of Applied Life Science (BK21 Plus), Gyeongsang National University) ;
  • Yoon, Young Eun (Division of Applied Life Science (BK21 Plus), Gyeongsang National University) ;
  • Kim, Jang Hwan (Division of Applied Life Science (BK21 Plus), Gyeongsang National University) ;
  • Lee, Yong Bok (Division of Applied Life Science (BK21 Plus), Gyeongsang National University)
  • 김태영 (경상대학교 응용생명과학부(BK21 Plus)) ;
  • 김송엽 (경상대학교 응용생명과학부(BK21 Plus)) ;
  • 윤영은 (경상대학교 응용생명과학부(BK21 Plus)) ;
  • 김장환 (경상대학교 응용생명과학부(BK21 Plus)) ;
  • 이용복 (경상대학교 응용생명과학부(BK21 Plus))
  • Received : 2019.10.31
  • Accepted : 2019.11.12
  • Published : 2019.12.31

Abstract

BACKGROUND: Mixed cropping of hairy vetch and Barley is widely used as a green manure for reducing chemical fertilizers while maintaining soil fertility in paddy soil. We investigated the effect of Molybdenum (Mo) fertilizer on vetch N2 fixation, biomass production and transfer N from vetch to barley under a hairy vetch-barley mixed cropping system. METHODS AND RESULTS: The barley and hairy vetch were sowed at a rate of 135 and 23 kg/ha, respectively, without chemical fertilizer application but with Mo fertilizer at 0, 0.5, 1.0, 2.0, and 4.0 kg/ha as a treatment. The percentage of hairy vetch N derived from air N2 fixation (%Ndfa) and N transfer from hairy vetch to barley (%Ndfv) was determined by the 15N natural abundance method. Although application of Mo at 2.0 kg/ha significantly increased biomass of both barley and hairy vetch, the biomass was decreased at application of Mo 4.0 kg/ha. At the application of Mo 2.0 kg/ha, the percentage of Ndfa and Ndfv was 81.7 and 53.9, respectively, which are significantly higher than that of the treatments without Mo. CONCLUSION: These results highlight that application of Mo fertilizer can be an effective measures to improve N fixation in hairy vetch and biomass production in both barley and hairy vetch.

본 연구는 풋거름보리와 헤어리베치 혼파 작부체계에서 Mo 시용이 풋거름 작물의 수량, 헤어리베치의 공중질소 고정율 및 헤어리베치에서 풋거름보리로 질소 이동율에 대한 정량적 평가를 실시하였다. Mo 2.0 kg/ha 시용에서 풋거름 작물의 최대수량을 나타내었다. 그리고 풋거름 작물의 최대수량을 나타낸 Mo 2.0 kg/ha 처리에서 헤어리베치의 공중질소 고정율은 81.7% 이었으며, 이때 헤어리베치에서 풋거름 보리로 이동된 질소는 풋거름 보리 질소함량의 53.9% 이었다. 따라서, Mo 2.0 kg/ha 처리가 풋거름 보리-헤어리베치 혼파 작부체계에서 가장 적절한 수준으로 나타났다. 본 연구는 국내에서 보고되지 않았던 헤어리베치로부터 보리로의 질소 이동을 정량화하였다는 점에서 의미가 있는 것으로 판단된다.

Keywords

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