Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Effect of $NO_3-N$ : $NH_4-N$ Ratio in Nutrient Solution on Growth, Yield and Fruit Quality of Strawberry 'Akihime' in Hydroponic System

딸기 수경재배에서 $NO_3-N$과 $NH_4-N$의 비율이 '장희(章姬)'의 생육, 수량 및 과실의 품질에 미치는 영향

  • Jun, Ha-Joon (College of Life & Enviromental Science Daegu University) ;
  • Hwang, Jin-Gyu (College of Life & Enviromental Science Daegu University) ;
  • Son, Mi-Ja (College of Life & Enviromental Science Daegu University) ;
  • Yoon, Hae-Suk (Gyeongnam Agricultural & Extension Services)
  • Published : 2009.03.31
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Abstract

The experiment has investigated the effects of growth, yield, fruit quality and cation absorption of strawberry 'Akihime' in different $NO_3-N:NH_4-N$ ratio in nutrient solution. $NO_3-N:NH_4-N$ ratios were 5.5:0, 4.0:1.5 and $3.0:2.5me{\cdot}L^{-1}$. As the ratio of $NH_4-N$ increased, pH was decreased by $5.0{\sim}6.0$ and EC sustained $0.8{\sim}1.0dS{\cdot}m^{-1}$ during experiment. Though in high $NH_4-N$ ratio of $3.0:2.5me{\cdot}L^{-1}$, the absorption of cations(K, Ca and Mg) was not inhibited. Treatment in contained $NH_4-N$ showed a tendency of increasing of petiole length and leaf width. The fruit length, fruit width, fruit weight and soluble solids were not significantly different. Yield per plant was lowest in $4.0:1.5\;me{\cdot}L^{-1}$, of $NO_3-N:NH_4-N$ ratio. Malformation fruit has not shown during the whole growth period.

본 연구는 딸기 배양액의 $NO_3-N$와 $NH_4-N$의 비율을 달리하여 '장희(章姬)' 딸기의 생육, 수량 및 과실의 품질, 그리고 양이온 흡수에 미치는 영향을 알아보고자 수행하였다. $NO_3-N$와 $NH_4-N$의 비율은 5.5:0, 4.0:1.5, $3.0:2.5me{\cdot}L^{-1}$로 조절하였다. 실험기간 동안 배양액내의 $NH_4-N$의 비율이 높아질수록 pH가 낮았으며, EC는 전 실험기간 동안 $0.8{\sim}1.0dS{\cdot}m^{-1}$로 4월 이후에 5.5:0 처리구가 다른 처리구보다 약간 낮았으나 그 외에는 처리구 간에 유의한 차이를 나타내지 않았다. $NO_3-N:NH_4-N$를 3.0:2.5로 $NH_4-N$의 비율을 높여도 양이온의 흡수에 길항증상이 나타나지 않았다. 딸기의 엽병장과 엽폭은 $NO_3-N$의 단독 처리구 보다 $NO_3-N:NH_4-N$이 4.0:1.5와 3.0:2.5인 처리구에서 더 길어졌다. $NO_3-N:NH_4-N$이 4.0:1.5와 3.0:2.5 처리구 간에는 유의한 차이가 없었다. 과장, 과경, 과중, 당도는 $NO_3-N$와 $NH_4-N$비율 차이에 따른 통계적인 유의차가 인정되지 않았다. 주당 과실 수량은 $NO_3-N:NH_4-N$ 4.0:1.5의 처리구에서 가장 낮았으며, 나머지 두 처리간에는 유의한 차이가 없었다. 실험 기간 동안 이상과는 전혀 발생하지 않았다.

Keywords

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