Evaluation of α - and β -bitter acids content in harvest of Czech hops in 2016

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193697%3A_____%2F17%3AN0000045" target="_blank" >RIV/60193697:_____/17:N0000045 - isvavai.cz</a>

Result on the web

<a href="https://www.kvasnyprumysl.cz/pdfs/kpr/2017/04/04" target="_blank" >https://www.kvasnyprumysl.cz/pdfs/kpr/2017/04/04</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.18832/kp201721" target="_blank" >10.18832/kp201721</a>

Result language

angličtina

Original language name

Evaluation of α - and β -bitter acids content in harvest of Czech hops in 2016

Original language description

The contents of α- and β-bitter acids from hops harvested in the Czech Republic in 2016 have been evaluated. Samples originated from all growing areas – Žatec, Úštěk and Tršice (77.3%, 10.7% and 11.9% of the hop garden areas in the Czech Republic). The tested varieties, Saaz (ŽPČ), Sládek, Premiant, Agnus, Kazbek and Saaz Late were cultivated on 87.8%, 5.6%, 3.7%, 0.8%, 0.4 and 0.9 of the harvest areas respectively. Samples were analyzed in accordance with the Analytica EBC, method 7.7 (HPLC), all results are given in weight % in dry matter. The average value of α-bitter acids in the Saaz hops (3.35%) was 1,20% (55.8% rel.) when compared to the year 2015 and 0.20% (5.6% rel.) lower to the average of the 23 years. The content of β-bitter acids (4.99%) was 1.75 % (54.0% rel.) and 0.33 % (7.0 % rel.) higher when compared to the year 2015 and to the long-term average respectively. The content of α-bitter acids in the Sládek hops (7.29%) was 2.20% (43.2% rel.) and 0.64% (9.6% rel.) higher when compared to the harvest in 2015 and to the average of the 13 years respectively. The content of α-bitter acids in the Premiant hops (9.02) was in 2.43% (36.9% rel.) higher when compared to the harvest in 2015 and comparable to the average of the last 13 years. The content of α-bitter acids in the Agnus hops (9.70) was in 0.80% (7.6% rel.) and 1.40% (12.6% rel.) lower when compared to the harvest in 2015 and to average of last 8 years. The content of α-bitter acids in the Kazbek (4.96%) and Saaz Late (4.76%) varieties was in comparison with the harvest in 2015 0.37% (8.1%rel.)and 2.6% (119% rel.) higher. The ratio α/β bitter acids, the relative content of cohumulone in the total α-bitter acids and the relative content of colupulone in the total β-bitter acids were also in agreement with the long-term averages found for the tested varieties.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Kvasný průmysl

ISSN

0023-5830

e-ISSN

2570-8619

Volume of the periodical

63

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

9

Pages from-to

190-198

UT code for WoS article

000430985100004

EID of the result in the Scopus database

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