Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Evaluation of Internal Quality of Kale Leaf by Non-Destructive Color Measurement

비파괴적 엽색분석을 통한 케일 잎의 내적품질 평가

  • Kang Ho-Min (Dept. of Horticulture, Kangwon Nat. Univ.) ;
  • Kim IL Sop (Dept. of Horticulture, Kangwon Nat. Univ.) ;
  • Won Jae Hee (Gangwon Provincial Agricultural Research and Extension Services)
  • Published : 2005.09.01
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Abstract

Kale leaf had similar contents of vitamin C, $NO_3$, p, Ca, Mg, and Fe with reported values. Among these internal quality factors, $NO_3$ content which has been a concern recently, ranged from 139 to 429 mg in 100 g fresh kale leaf, Kale showed high vitamin C content ranging from 106 to 203 mg in 100 g fresh leaf. The relative concentration of chlorophyll and b value color had a high correlation coefficient (r) with vitamin C, $NO_3$, Mg and Fe content. The relationship between $NO_3$ content and the relative concentration of chlorophyll was given by the following linear equation: $NO_3$ content : 21.55 + (5.907 ${\times}$ the relative concentration of chlorophyll) with an r of $0.910^{{\ast}{\ast}}$. Correlation between $NO_3$ content and b value was also very dependable (r = $-0.901^{{\ast}{\ast}}$). Vitamin C content and the relative concentration of chlorophyll showed a high correlation, r = $-0.858^{{\ast}{\ast}}$. Among internal quality factors, vitamin C content increased with decreasing $NO_3$ content and their correlation coefficient was high (r = $-0.795^{{\ast}{\ast}}$). Consequently, $NO_3$ content of kale leaf could be inferred from an external nondestructive method, such as the relative concentration of chlorophyll. We may be able to produce high quality kale leaves containing high amount of vitamin C and low content of $NO_3$ using this method.

케일 잎의 내적 품질 중 비타민 C, 질산염, P, Ca, Mg, Fe 함량은 기존의 보고와 유사하였고, 이중 채소 품질로서 가장 큰 관심이 되고 있는 질산염은 100g 생체 중 139${\~}$429 mg으로 나타났으며, 비타민 C 함량은 역시 생체 100g당 106${\~}$203 mg으로 나타났다. 상대적 엽록소 함량과 케일 잎의 내적품질과 엽색과의 관계를 분석해 본 결과 상대적 엽록소와 b 수치가 내적 품질 중 질산염, 마그네슘, 철과 같은 엽록소와 관계 깊은 요인, 그리고 비타민 C 함량과 높은 상관관계를 보였다. 이 중 질산염 함량은 상대적 엽록소 함량과 r = $0.910^{{\ast}{\ast}}$ (질산염 함량 =$5.907^{{\ast}{\ast}}$ 상대적 엽록소 함량 + 21.55), 그리고 b 수치와는 r = $-0.901^{{\ast}{\ast}}$의 고도의 음의 상관관계를 나타내었다. 비타민 C 함량도 상대적 엽록소와 r = $-0.858^{{\ast}{\ast}}$의 고도의 상관관계를 보였다. 내적 품질간의 상관관계에서는 질산염 함량이 적을수록 비타민 C함량이 높아져 r = $-0.795^{{\ast}{\ast}}$의 고도의 음의 상관관계를 보였다. 따라서 재배중 비파괴적인 상대적 엽록소 측정으로 케일 잎의 질산염 등의 내적 품질의 예측이 가능하며 이를 통한 시비관리로 보건적 가치가 높은 저 질산염, 고 비타민 C의 케일생산이 가능해 질 것이라 생각된다.

Keywords

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