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Pavlovi c, V. et al.

BALWOIS 2010 - Ohrid, Republic of Macedonia - 25, 29 May 2010. Modeling of quality prediction for hops ( Humulus lupulus L.) in relation to meteorological variables. Pavlovi c, V. et al. Business chain in a hop industry. Trade with hops. Beer production. Hop production.

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Pavlovi c, V. et al.

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  1. BALWOIS 2010 - Ohrid, Republic of Macedonia - 25, 29 May 2010 Modeling of quality prediction for hops (Humulus lupulus L.) in relation to meteorological variables • Pavlovic, V.et al.

  2. Business chain in a hop industry Trade with hops Beer production Hop production Beer consumption

  3. Austria H Maribor Slovenj Gradec Ptuj Velenje Celje Italy Croatia Experimental data Source: ARSO

  4. Model of quality prediction for hops (meteorological variables anylsed) Impacts on alpha-acid contents in hops were studied in relation to: - length of sunshine (requirements 15 h/d) - rainfall (over 600 mm of rainfall) - air temperature (1700oC of effective temp.)

  5. Average values of bitter substances (alpha-acids) in Slovenian hop varieties Content of alpha-acids (%)

  6. Predicted and calculated contents of α-acids for the “VIRTUAL”1993-2009

  7. CORRELATION CONSTANTS’ VALUES PRODUCTION AREA SLOVENJ GRADEC PRODUCTION AREA CELJE PRODUCTION AREA SAVINJA VALLEY AURORA BOBEK STYRIAN GOLDING AURORA BOBEK STYRIAN GOLDING AURORA BOBEK STYRIAN GOLDING HOP VARIETY CULTIVAR 1.44 0.90 0.61 1.44 0.90 0.61 1.44 0.90 0.61 0.94 PRODUCTION AREA 0.94 0.94 1.03 1.03 1.03 1.02 1.02 1.02 Contents of @-acids for hop varietiesin various production areas=model prediction ×K1 hop variety ×K2 production area “VIRTUAL”

  8. Predicted /derived and measured average contents of α-acids for hop varieties EBC 2000, 7.4.

  9. 1) Model prediction of alpha-acid contents for hops can be made 4-6 weeks before a hop harvest ( VIRTUAL variable + coefficients for 3 hop varieties and 3 production regions).2) Preliminary assessment of @-acid contents in hops will be used for its sale strategy (contract prices of hops are variable /linked to @-acid contents).3) Drought management contribution for hop industry sector (water stress effects on a plant level will be reduced ). Researchresults

  10. Thank you

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