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http://dx.doi.org/10.9721/KJFST.2018.50.3.260

Changes in physicochemical characteristics of sorghum among different varieties and at different harvest stages after heading  

Kim, Sung Kook (Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
Jung, Gun Ho (Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
Lee, Jae Eun (Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
Lee, Byoung Kyu (Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
Woo, Koan Sik (Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration)
Publication Information
Korean Journal of Food Science and Technology / v.50, no.3, 2018 , pp. 260-266 More about this Journal
Abstract
The change in physicochemical characteristics of sorghum among different varieties and at different harvest stages after heading were evaluated. The proximate compositions and chromaticity of sorghum were significantly different, depending on their varieties and harvesting times. Water solubility was high in sorghum harvested on the $50^{th}$ day after heading; however, the swelling power was reversed. Total polyphenol content of Hwanggeumchal, Nampungchal, and Sodamchal was 17.60-24.62, 17.88-24.67, and 17.37-22.37 mg GAE/g, respectively, and the flavonoid content was 10.43-13.50, 9.68-13.85, and 9.52-12.46 mg CE/g, respectively. The DPPH radical-scavenging activities were 9.94-16.21, 11.42-16.54, and 10.12-15.16 mg TE/g, respectively, and the ABTS radical-scavenging activities were 8.85-19.99, 10.51-20.24, and 9.71-17.93 mg TE/g, respectively. Total polyphenol and flavonoid contents, and radical scavenging activities were high in sorghum harvested on the $40-50^{th}$ day after heading. As a result, it is considered that sorghum varieties such as Hwanggeumchal, Nampungchal, and Sodamchal should be harvested on the $40^{th}$ day after heading.
Keywords
sorghum (Sorghum bicolor L. Moench); harvest stage; quality; physicochemical characteristics;
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