Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Relationship between Cucumber Yield and Nitrate Concentration in Plastic Film House with Ryegrass Application

호밀이 투입된 오이 시설재배지에서 수량과 토양용액의 질산태질소과의 관계

  • 이창훈 (농촌진흥청 국립농업과학원 토양비료관리과) ;
  • 임태준 (농촌진흥청 국립원예특작과학원 원예특작환경과) ;
  • 강성수 (농촌진흥청 국립농업과학원 토양비료관리과) ;
  • 김명숙 (농촌진흥청 국립농업과학원 토양비료관리과) ;
  • 김유학 (농촌진흥청 국립농업과학원 토양비료관리과)
  • Received : 2012.11.13
  • Accepted : 2012.12.10
  • Published : 2012.12.31
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Abstract

This study was conducted to estimate the effect of nitrogen reduction by applying ryegrass and to determine the relationship between yield and nitrate concentration of soil solution for cucumber cultivation in plastic film house. Nitrogen levels with recovery of ryegrass ($42.3Mg\;ha^{-1}$) was 0, 50, 75, 100 % of 199 kg N $ha^{-1}$ as N recommendation by determining soil EC value. Yield and nitrate concentration in soil solution was investigated during cucumber cultivation. Yields of N treatments applied ryegrass showed 64.3, 70.9, 70.3, and $76.5Mg\;ha^{-1}$, respectively, it could reduce about 25-50% of nitrogen application compared to yield ($68Mg\;ha^{-1}$) of NPK plot applied 199 kg N $ha^{-1}$. Nitrate concentration in soil solution was average 26.0, 30.1, 41.4, $58.5mg\;L^{-1}$ during cucumber cultivation and was related between yield and average nitrate concentration of soil solution following as; $Y=49.3+0.63X+0.0034X^2$ ($R^2=0.778^{**}$). However, it needs to conduct extra-experiment due to high variation of nitrate concentration during cultivation periods.

오이 시설재배지에서 질소 시비량 절감에 대한 호밀 환원 효과와 수량과 토양용액 중 질산태질소와의 관계를 평가하였다. 시험 처리구는 토양검정시비구 (NPK), 호밀을 $42.3Mg\;ha^{-1}$ 환원하여 질소비료 199 kg N $ha^{-1}$의 0, 50, 75, 100%의 4 수준으로 시비하여 시설재배지에서 오이 수량과 토양용액의 질산태질소 농도를 조사하였다. NPK의 오이수량은 $68.8Mg\;ha^{-1}$이었고, 호밀의 투입은 토양검정 질소시비량의 25-50%를 절감할 수 있었다. 오이재배 기간 중 NPK 토양용액의 평균 $NO_3$-N 농도는 $32.4mg\;L^{-1}$ 이었고, 호밀처리구의 0, 50, 75, 100%에서는 각각 26.0, 30.1, 41.4, $58.5mg\;L^{-1}$으로 질소시비량이 증가함에 따라 높아졌다. 이때 시설재배 오이수량과 토양용액 중 평균 $NO_3$-N 농도와의 수식 ($Y=49.3+0.63X-0.0034X^2$, $R^2=0.778^{**}$)은 유의성을 나타내었다. 따라서 오이 재배 중 토양용액 분석으로 질소 웃거름 시비량 결정이 가능할 것으로 판단되었다. 그러나 오이수량과 토양용액 $NO_3$-N 농도와의 관계에 대한 추가적인 실증연구가 필요할 것으로 사료된다.

Keywords

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  1. Effect of Nitrogen Application Levels on Nitrate Concentration in Soil Solution under Plastic Film House vol.48, pp.1, 2015, https://doi.org/10.7745/KJSSF.2015.48.1.030