Influence of weather conditions, irrigation and plant age on yield and alpha-acids content of Czech hop (Humulus lupulus L.) cultivars

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F14864347%3A_____%2F19%3AN0000085" target="_blank" >RIV/14864347:_____/19:N0000085 - isvavai.cz</a>

Result on the web

<a href="https://www.lfl.bayern.de/ipz/hopfen/024299/" target="_blank" >https://www.lfl.bayern.de/ipz/hopfen/024299/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Influence of weather conditions, irrigation and plant age on yield and alpha-acids content of Czech hop (Humulus lupulus L.) cultivars

Original language description

DONNER, Pavel, Jaroslav POKORNÝ, Josef JEŽEK, Karel KROFTA and Josef PATZAK. Influence of weather conditioins, irrigation and plant age on yield and alpha-acids content of Czech hop (Humulus lupulus L.) cultivars. In: F. WEIHRAUCH, ed. Proceedings of the Scientific-Technical Commission 07 – 11 July 2019, Bischoffsheim, France. Wolnzach: Scientific-Technical Commission of the International Hop Growers' Convention, 2019, p. 52. ISSN 2512-3785. Hop (Humulus lupulus L.) is an essential crop for the brewing industry. With more than one thousand years hop growing history, the Czech Republic is on the third position worldwide in the acreage and production after the USA and Germany. As the climate changes, weather conditions during growth of hop plants strongly influence the production of hops in both quantity and quality. In this study, we quantified effects of weather conditions, irrigation and plant age on yield and alpha-acids content of Czech hop cultivars Saaz, Sládek, Premiant and Agnus since 1993. Rainfall was the most significant factor that positively influenced the yield of Saaz hops with correlations r = 0.5904 and 0.6061 for total seasonal rainfall, 0.6498 and 0.6027 for days with rainfall over 3 mm, 0.3866 and 0.5771 for rainfall in May and 0.4953 and 0.3225 in July in Saaz region and Stekník farm, respectively. The yield of other cultivars Sládek, Premiant and Agnus was not influenced by rainfall, but there was a positive effect of irrigation level on increasing yield with correlations of 0.5831, 0.5471 and 0.4868. High air temperatures during the summer, expressed as average monthly temperatures, number of tropical days and tropical nights, were the most significant factors that negatively influenced the alpha-acids content with high correlations ranging from -0.5577 to -0.8292. Saaz and Premiant cultivars were more sensitive than Sládek, while Agnus showed a stable weather-independent alpha acid content. Yield and alpha-acids content were also influenced by plant age since younger plants were more productive and after 15 to 20 years it was time for replanting.

Czech name

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Czech description

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Type

O - Miscellaneous

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

2019

Confidentiality

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