Brewing parameters of malts from winter poly-row barley varieties, developed at Institute of Agriculture - Karnobat

Gabriela Marinova, Boryana Dyulgerova, Iva Tomova

Abstract: The brewing qualities of malts of 5 varieties and 3 perspective lines of winter multi-row (4-row and 6-row) Bulgarian barley (Veslets, Izgrev, Kt -3029, Kt-3040, IZ Bori, Bojin, Zemela and Kt-3038) from crops 2017, 2018 and 2019 have been studied. They have been selected and cultivated in the fields of the Institute of Agriculture, Karnobat. Their protein content (except for only 4 samples for the studied period) is below 12.5% d. m. and meet the criterion for micromalting of two-row barley for brewing. Malt extract from 75.5 to 76.4% d. m. for the crop 2017, from 77.0 to 79.1% d. m. for the crop 2018 and from 76.4 to 77.8% d. m. for the crop 2019 was obtained. The varieties and lines combine good economic and malt qualities, have the potential to be used for brewing and will contribute to the production of good quality beer. Individual crops are affected by climatic conditions. The problem with the use of poly-row barley for brewing is mainly not the protein content (theoretically higher), but the lower grading and fluctuations in it, compared to brewing ones. On the other hand, they are suitable for the use of adjuncts, especially corn.

Keywords: barley poly-row varieties; brewing properties; malt; yield

Date published: 2021-04-23