Kvasny Prum. 2010; 56(4): 188-194 | DOI: 10.18832/kp2010026

Brewing value of Czech and Moravian hops of the year crop 2009.Peer-reviewed article

Alexandr MIKYŠKA, Jiří ČULÍK

Výzkumný ústav pivovarský a sladařský, a. s., Pivovarský ústav Praha, Lípová 15, 120 44 Praha 2

Evaluation of α- and β-bitter acids content of hops in hops crop 2009 in Czech Republic has been carried out. Sampling map concerned all three growing areas - Žatec (73.5 % of hop gardens area in CR), Úštěk (12.6 %) and Tršice (13.9 %) area. Saaz hop variety was growing on 4,627 ha, other important varieties were Sládek (277 ha) and Premiant (293 ha). Hops were analyzed according to EBC method 7.7 (HPLC), all results are expressed as % w/DM. Average value of bitter acids content of Saaz hops variety in Czech Republic was α = 3.9 % (Žatec growing area 4.1 %, Úštěk growing area 3.7 %, Tršice growing area 3.6 % ), β = 4.9 %. The value of α-bitter acids was higher in 0.2 % compare to results of year 2008 and it was higher in 0.2 % compare to last 16 years average. The content of β-bitter acids was in 0.2 % higher compare to year 2008. Average values of bitter acids content of variety Sládek in Czech Republic were α = 7.8 %, β = 7.2 %. The value of α-bitter acids was in 0.7 % higher compare to year 2008 and 5 years average. Average values of bitter acids content of variety Premiant was α = 11.0 %, β = 5.1 %. The value of α-bitter acids was in 1.5 % higher compare to 5 years average and in 0.8 % higher compare to year 2008. Average values of bitter acids content of variety Agnus was α = 13.5 %, β = 6.6 %.Evaluation of α- and β-bitter acids content of hops in hops crop 2009 in Czech Republic has been carried out. Sampling map concerned all three growing areas - Žatec (73.5 % of hop gardens area in CR), Úštěk (12.6 %) and Tršice (13.9 %) area. Saaz hop variety was growing on 4,627 ha, other important varieties were Sládek (277 ha) and Premiant (293 ha). Hops were analyzed according to EBC method 7.7 (HPLC), all results are expressed as % w/DM. Average value of bitter acids content of Saaz hops variety in Czech Republic was α = 3.9 % (Žatec growing area 4.1 %, Úštěk growing area 3.7 %, Tršice growing area 3.6 % ), β = 4.9 %. The value of α-bitter acids was higher in 0.2 % compare to results of year 2008 and it was higher in 0.2 % compare to last 16 years average. The content of β-bitter acids was in 0.2 % higher compare to year 2008. Average values of bitter acids content of variety Sládek in Czech Republic were α = 7.8 %, β = 7.2 %. The value of α-bitter acids was in 0.7 % higher compare to year 2008 and 5 years average. Average values of bitter acids content of variety Premiant was α = 11.0 %, β = 5.1 %. The value of α-bitter acids was in 1.5 % higher compare to 5 years average and in 0.8 % higher compare to year 2008. Average values of bitter acids content of variety Agnus was α = 13.5 %, β = 6.6 %.

Keywords: hops crop, Saaz hop, bitter acids

Received: January 9, 2010; Accepted: February 20, 2010; Published: April 1, 2010