Evaluation of Internal Quality of Kale Leaf by Non-Destructive Color Measurement
2005
Kang, H.M. (Kangwon National University, Chuncheon, Republic of Korea) | Kim, I.S. (Kangwon National University, Chuncheon, Republic of Korea) | Won, J.H. (Gangwon Agricultural Research and Extension Services, Chunchon, Republic of Korea)
Kale leaf had similar contents of vitamin C, NO₃, P, Ca, Mg, and Fe with reported values. Among these internal quality factors, NO₃ 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, NO₃, Mg and Fe content. The relationship between NO₃ content and the relative concentration of chlorophyll was given by the following linear equation: NO₃ content = 21.55 + (5.907 × the relative concentration of chlorophyll) with an r of 0.910**.
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