Effects of Drying Methods on Anthocyanin Contents of Colored Barley (Hordeum vulgare L.) cv. Boanchalbori
2013
Song, T.H., RDA, Iksan, Republic of Korea | Park, T.I., RDA, Iksan, Republic of Korea | Han, O.K., Chanbuk National University, Jeonju, Republic of Korea | Yoon, C., Chanbuk National University, Jeonju, Republic of Korea | Kang, H.J., RDA, Iksan, Republic of Korea | Park, K.G., RDA, Iksan, Republic of Korea
This study investigated the effects of drying methods and drying time on the changes in anthocyanin content in colored barley. Colored barley cultivar Boanchalbori was harvested at a time when the anthocyanin content was the most and dried in afield. The harvested barley was then treated by two methods, sun drying and shade drying, for 4, 8, 24, and 32 h. The moisture content of the sun-dried barley decreased slightly faster than shade-dried samples, but the difference was not statistically significant. Chemical analysis indicated that the samples dried under shaded conditions had slightly higher crude fiber and lower nitrogen free extract, but the difference was not statistically significant. There was no difference in the total digestible nutrients between the two methods. In the case of sun-dried barley, the anthocyanin content decreased compared to the control and shade-dried samples after drying for 4 h (p 0.05), was maintained at a constant level at 24 h, and then decreased at 32 h. In case of shade-dried barley, the anthocyanin content decreased gradually with the drying time, and a significant decrease was found at 24 h of drying (p0.05) as compared to the control. The shade-dried method was more successful in reducing anthocyanin loss than the sun-dried method (p0.05). There was a slight decrease in 1,1-Diphenyl-2-Picrylhydrazyl radical scavenging with drying time in the shade-dried method, and a significant decrease after 4 h with the sun-dried method. These results showed that covering with a two-layer awning was advantageous to dry colored barley in the field conditions.
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