Alpha acids content in Czech hops from harvest 2022 - forecasts, reality and trends

Authors

  • Alexandr Mikyška Research Institute of Brewing and Malting, Lípová 511/15, 120 00 Prague 2, Czech Republic https://orcid.org/0000-0001-7025-1436
  • Karel Krofta Hop Research Institute, Kadaňská 2525, 438 01 Žatec, Czech Republic
  • Gabriela Fritschová Hop Research Institute, Kadaňská 2525, 438 01 Žatec, Czech Republic
  • Klára Belešová Research Institute of Brewing and Malting, Lípová 511/15, 200 00 Prague 2, Czech Republic
  • František Kroupa V.F. HUMULUS, 270 04 Hořesedly 152, Czech Republic
  • Jana Tichá Chmelařství, Cooperative Žatec, Mostecká 2580, 438 01 Žatec, Czech Republic

DOI:

https://doi.org/10.18832/kp2023.69.692

Keywords:

hops, alpha acids, Saaz hops, hybrid varieties, weather conditions

Abstract

From the brewing and commercial point of view, the content of alpha acids is the most important quality parameter of hops, which is subject to significant annual fluctuations. The established system for evaluating the content of alpha acids in Czech hops consists of pre-harvest and harvest predictions and a detailed analysis of reality based on the analysis of all purchasing lots of raw hops. It is differentiated according to varieties and hop growing areas. This article presents the results of the 2022 harvest, discusses the influence of weather conditions, the age of hop gardens and virus-free seedlings on the harvest results, and the relationship of predictions to reality. The average content of alpha acids in the majority Saaz variety in the Saaz, Auscha and Tirschitz hop growing regions was 2.88, 2.80 and 2.63% by weight in the original respectively. In all areas, the alpha acid content has been significantly affected by the age of the hop growths. Hybrid varieties coped with adverse weather conditions much better than most aromatic hops. The total production of alpha acids in Czech hops from the harvest of 2022 was 182.9 tons, one of the lowest in the last 15 years. It is due to the concurrence of two factors: the low yield per hectare and the content of alpha acids in Saaz hops. The cause was, similarly to Germany, an extreme deficit of precipitation and high temperatures during the vegetation season.

References

Anonym (2022). Alpha-säurenwerte von Hopfen der Ernte 2022 und aktualisirte mehrjährige Durchschnittliswerte – Teil 1. Brauwelt, 42, 1082.

CISTA (2022). Úroda chmele je nejnižší za posledních 10 let. In: eagri.cz [online] [2023-01-30]. Retrieved from: https://eagri.cz/public/web/ukzuz/portal/trvale-kultury/statisticke-vystupy/uroda-chmele-2022-nejnizsi.html

Donner, P., Pokorný, J., Ježek, J., Krofta, K., Patzak, J., Pulkrábek, J. (2020). Influence of weather conditions, irrigation and plant age on yield and alpha-acids content of Czech hop (Humulus lupulus L.) cultivars. Plant Soil Environ., 66(1), 31–46. https://doi.org/10.17221/627/2019-PSE

EBC Analysis Committee (2010). Analytica EBC, Methods 7.4, 7.7, Fachverlag Hans Carl, Nürnberg. ISBN 978-3-418-00759-5.

Forster, A., Schüll, F. (2020). The impact of climate change on hops. Brauwelt International, 40(3), 174–178.

Forster, A., Gahr, A. (2020). The Saaz hop variety – how great Is the influence of climate and growing region in the Czech republic? Hopfen-Runhschau International, 2020/2021, 38–44.

HRI (2022). Počasí. Chmelařská oblast Žatecko. In: chizatec.cz [online] 2023-01-30]. Retrieved from http://www.chizatec.cz/pocasi/?arc=163&sub=92

HRIa (2022). Dynamika tvorby alfa kyselin v hlávkách ŽPČ před sklizní. In: chizatec.cz [online] [2023-01-30]. http://www.chizatec.cz/predskliznove-odbery/?arc=291

Chromý, Z. (2022). České chmelařství v přehledech ÚKZÚZ. Chmelařská ročenka 2022. VÚPS, Praha, 291–317. ISBN978-80-86576-95-4

Krofta, K., Fritschová, G., Mikyška, A., Belešová, K., Vojtěchová, D., Tichá, J. (2022). Alpha acids content in Czech hops from harvest 2021 - forecasts, reality and trends. Kvasny prumysl, 68(1), 564–571. https://doi.org/10.18832/kp2022.68.564

Kučera, J., Krofta, K. (2009). Mathematical model for prediction of yield and alpha acid contents from meteorological data for saaz aroma variety. Acta Horticulturae, 848, 131–139. https://doi.org/10.17660/ActaHortic.2009.848.14

Meloun, M., Militký, J. (1994). Statistical processing of experimental data. Plus, Praha. ISBN 80-85297-56-6

Nesvadba, V., Krofta, K., Patzak, J. (2022). Czech hop varieties. Chmelařský institut, Žatec. ISBN 978-80-86836-60-7.

Pethybridge, S.J., Hay, F.S., Barbara, D.J., Eastwell, K.C., Wilson, C.R. (2008). Viruses and viroids infecting hop: significance, epidemiology, and management. Plant Disease, 92, 324–338. https://doi.org/10.1094/PDIS-92-3-0324

illustration image - hops

Downloads

Published

2023-02-15

How to Cite

Mikyška, A., Krofta, K., Fritschová, G., Belešová, K., Kroupa, F., & Tichá, J. (2023). Alpha acids content in Czech hops from harvest 2022 - forecasts, reality and trends. KVASNY PRUMYSL, 69(1), 692-699. https://doi.org/10.18832/kp2023.69.692
صندلی اداری سرور مجازی ایران Decentralized Exchange

Issue

Section

Articles
فروشگاه اینترنتی صندلی اداری