Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Effect of Oil Cake Banding Application on Growth and Nutrient Use Efficiency in Maize

유박의 줄뿌림 시비가 옥수수 생육 및 양분이용효율에 미치는 영향

  • 옥정훈 (국립농업과학원 유기농업과) ;
  • 조정래 (국립농업과학원 유기농업과) ;
  • 이병모 (농촌진흥청 국외농업기술과) ;
  • 안난희 (국립농업과학원 유기농업과) ;
  • 신재훈 (국립농업과학원 유기농업과) ;
  • 이연 (환경농업단체연합회 유기농업연구소)
  • Received : 2016.10.26
  • Accepted : 2016.11.04
  • Published : 2016.11.30
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Abstract

This study aimed at improving the method of oil cake application in maize. The experiment was conducted during 2 years at NAS (National Institute of Agricultural Sciences) experimental field, located in Wanju-kun, Jeollabuk-do. Growth factors and nutrient use efficiency were evaluated depending on oil cake application depth, placement, and application rate. Difference in oil cake application method and depth was tested in 2012 and different placements of oil cake application were compared in 2013. Plant height, SPAD value, and dry weight of stem and corn were investigated. SPAD value, dry weight of stem and corn were significantly higher in oil cake banding treatment (OB5, 5 cm depth) as compared to others application methods, i.e. spreading (OS0), deep banding (OB10) and banding + spreading (OB5S). In addition, dry weight of stem and corn of banding treatments (OBL, OBLL) on rhizosphere and in between row (OBR) were higher than spreading treatment (OSP). Furthermore, in case of reduced application rate in additional fertilization did not decrease dry weight of corn and increased nutrient use efficiency. Therefore, it is concluded that banding application in 5 cm-depth and rhizosphere can improve growth and nutrient use efficiency in maize production.

본 연구에서는 양분 유실이 많고 이용효율이 낮은 유박 전면시비에서 유박 줄뿌림으로 시비방법을 개선하였을 때 유박의 처리 깊이, 위치, 투입량에 따른 옥수수 생육 변화와 양분이용효율 변화를 2년간 조사하였다. 옥수수 생육조사결과, 유박 전면시비와 비교하여 유박 줄뿌림 처리구가 초장, SPAD값, 줄기와 알곡의 건물중 등에서 전반적으로 좋은 생육을 보였으며, 특히 유박 줄뿌림 처리구중에서도 깊이를 5 cm로 옥수수 근권에 줄뿌림 시비하는 것이 가장 효과적인 것으로 나타났다. 양분이용효율 측면에서도 유박 줄뿌림 처리구에서 높은 효율을 보였으며 유박을 옥수수 근권에 줄뿌림 시비로 개선하여 처리한다면 추비시 투입량을 1/2로 줄여도 옥수수 알곡에서 양분이용효율은 감소하지 않는 것으로 나타났다. 유박 근권 줄뿌림 시비방법은 유박의 투입량도 기준방법과 비교하여 25% 줄일 수 있고 양분이용 측면에서 효과적인 방법으로 판단된다.

Keywords

References

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