气候学家Martin Mozny及同事发现了，萨兹啤酒已经在近年来持续下降。而多变的气候是罪魁祸首。
Mozny的研究团队搜集关于天气情况，作物产量和啤酒花质量的数据，研究1954年到2006年之间，捷克共和国的气候改变对萨兹啤酒花质量的影响。最好的萨兹啤酒花含有5%的α酸，它是一种能让人产生微妙感觉的混合物，味微苦。
研究发现，自1954年以来，萨兹啤酒花中α酸含量每年以0.06%的速度在递减。在未来全球变暖条件下，啤酒花的产量和质量都会有更大的跌幅。研究结果发表在Agricultural and Forest Metaorology杂志上。
"这不仅仅是捷克啤酒的遭遇，"欧盟作物专家Francesco Tubiello认为，"盛产啤酒的德国东部地区和捷克斯洛伐克中部也会面临同样的问题。"(生物谷Bioon.com)
生物谷推荐原文出处：
Agricultural and Forest Metaorology doi:10.1016/j.agrformet.2009.02.006
The impact of climate change on the yield and quality of Saaz hops in the Czech Republic
Martin Moznya,Radim Tolasza,Jiri Nekovara,Tim Sparksb,Mirek Trnkac,and Zdenek Zaludc
a Czech Hydrometeorological Institute, Na Sabatce 17, 14306 Praha 4 - Komorany, Czech Republic
b Centre for Ecology & Hydrology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE28 2LS, UK
c Institute of Agrosystems and Bioclimatology, Mendel University of Agriculture and Forestry Brno, Zemedelska 1, 61300 Brno, Czech Republic
Abstract
The impact of climate change on the production and quality of hops Humulus lupulus will depend on future weather conditions in the growing season. Our simulations suggest that hops will be particularly vulnerable to a change in climate. Even with the modest warming so far experienced yields have stagnated and quality declined. Recorded observations show an increase in air temperature which is associated with an earlier onset of hop phenological phases and a shortening of the vegetation period. Simulations using future climate predict a decline in both yields, of up to 7-10%, and α-acid content, of up to 13-32%, the latter a major determinant of quality. The concentration of hop cultivation in a comparatively small region in the Czech Republic makes it more vulnerable than if the crop were grown in more areas with different climates. Thus climate change may gradually lead to changes in the regionalization of hop production. Policy assistance may be necessary for the adaptation of the Czech hop growing industry to changed climatic conditions.
Keywords: Hops; Climate impacts; Yield; α-Acid
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