Plant Soil Environ., 2013, 59(6):267-272 | DOI: 10.17221/831/2012-PSE

Market value assessment of hops by modeling of weather attributes

M. Pavlovic1, V. Pavlovic1, C. Rozman1, A. Udovc2, D. Stajnko1, D. Wang3, M. Gavric4, S. Srecec5
1 Faculty of Agriculture and Life Sciences, University of Maribor, Maribor, Slovenia
2 Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
3 National Institute of Food and Fermentation Industries, Beijing, P.R. China
4 Telvent DMS LLC, Novi Sad, Serbia
5 College of Agriculture, Krizevci, Croatia

The effect of major weather factors on the quality of hops in Slovenia from 1994 to 2009 is analyzed and discussed. For this purpose, the three main varieties, namely Savinjski golding, Aurora and Bobek were merged into a model variety which we called Virtual. Through assessment of correlation coefficients, we tried to find specific times of the year when the weather conditions affect the alpha-acid content with a view toward prediction. The most significant time periods of weather that influenced the alpha-acid contents of hops during the growing season are identified as attributes of air temperatures calculated during the interval from the 24th to the 31st week (T2431; r = -0.92;P < 0.01), as attributes of rainfall and sunshine duration calculated during the interval from the 25th to the 29th week (R2529; r = 0.83; P < 0.01 and S2529, r = -0.76; P < 0.01), and as attributes of air humidity calculated during the interval from the 28th to the 33rd week (RH2833; r = 0.77; P < 0.01).

Keywords: Humulus lupulus L.; quality; alpha-acids; weather parameters; model; Slovenia

Published: June 30, 2013  Show citation

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Pavlovic M, Pavlovic V, Rozman C, Udovc A, Stajnko D, Wang D, et al.. Market value assessment of hops by modeling of weather attributes. Plant Soil Environ. 2013;59(6):267-272. doi: 10.17221/831/2012-PSE.
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    References

    1. Abdi H. (2003): Factor rotations in factor analyses. In: Lewis-Beck M., Bryman A., Futing T. (eds.): The SAGE Encyclopedia of Social Sciences Research Methods. Thousand Oaks (CA), Sage.
    2. Analytica EBC (2000): European Brewery Convention. Grundwerk: Section 7.4. EBC Analysis Committee, Hans Carl Getraenke Fachverlag, Nuernberg.
    3. De Keukeleire J., Ooms G., Heyerick A., Roldan-Ruiz I., Van Bockstaele E., De Keukeleire D. (2007): Relevance of organic farming and effect of climatological conditions on the formation of alpha-acids, beta-acids, desmethylxanthohumol, and xanthohumol in hop (Humulus lupulus L.). Journal of Agricultural and Food Chemistry, 55: 61-66. Go to original source... Go to PubMed...
    4. Forster A. (1993): How to analyse hops? Hop News from Germany, 1 (Special Issue): 45-53.
    5. Hecht S., Kammhuber K., Reiner J., Bacher A., Eisenreich W. (2004): Biosynthetic experiments with tall plants under field 18 O conditions. 2 incorporation into humulone from Humulus lupulus. Phytochemistry, 65: 1057-1060. Go to original source... Go to PubMed...
    6. Howard G.A., Tatchell A.R. (1956): Development of resins during the ripening of hops. Brewing Industry Research Foundation, 62: 251-256. Go to original source...
    7. Kosir I.J., Livk J. (2009): Hop industry crop Evaluation 2009. Ministry of Agriculture, Forestry and Food, 14. (In Slovenian)
    8. Kucera J., Krofta K. (2009): Mathematical model for prediction of alpha acid contents from meteorological data for 'Saaz' aroma variety. Acta Horticulturae, 848: 131-139. Go to original source...
    9. Markovitch S., Rosenstein D. (2002): Feature Generation Using General Constructor Functions. Machine Learning, 49: 59-98. Go to original source...
    10. Mozny M., Tolasz R., Nekovar J., Sparks T., Trnka M., Zalud Z. (2009): The impact of climate change on the yield and quality of Saaz hops in the Czech Republic. Agricultural and Forest Meteorology, 149: 913-919. Go to original source...
    11. Pavlovic M., Pavlovic V. (2011): Model evaluation of quality attributes for hops (Humulus lupulus L.). Agrociencia, 45: 339-351.
    12. Pavlovic M. (2012): EU Hop Industry. Production, Organization, Policy and Marketing. LAP LAMBERT Academic Publishing. AV Akademikerverlag, Saarbrücken, 64.
    13. Srecec S., Kvaternjak I., Kaucic D., Spoljar A., Erhatic R. (2008): Influence of climatic conditions on accumulation of alphaacids in hop cones. Agriculturae Conspectus Scientificus, 73: 161-166.
    14. Thomas G.G. (1980): Weather factors controlling the alpha-acid content of hops (Humulus lupulus L.). Journal of Horticultural Science, 55: 71-77. Go to original source...
    15. Zattler F., Jehl J. (1962): On the influence of atmospheric conditions on yield and quality of the hops in the Hallertau in the period 1926-1961. Hopfen-Rundschau, 13: 61-64. (In German)

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