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External environment factors influencing Czech wine production industry went have been significantly changing in the past 20 years. Objective of this paper is to identify and describe selected external environment factors influencing this industry.
Changes in the Czech Republic in 1989 significantly influenced all industries in the Czech economy, including wine production. The most significant include the transition from planned socialistic economy to the market economy, establishment of the Czech Republic (January 1, 1993), entrance European Union (May 1, 2004). For the wine production industry it brought for example opening the domestic market to competition, simplifying international trade with EU-member countries, stabilization of the area of vineyards including the ban on their extension, establishment of the Wine Fund, establishment of non-governmental organisations supporting activities of wine producers (e.g. Union of wine producers of the Czech Republic, National Wine centre, Moravín, Partnership foundation), etc. Significant changes can be found also in the field of wine-marketing and promotion of wines. Wines from the Czech Republic are sold in foreign markets and achieve awards within international trade fairs and wine exhibitions, Czech Republic organises wine trade fairs, e.g. Vinex or Wine and distilled products, Wine fund have registered the trademark "Svatomartinské víno" (St. Martin Wine), etc. Other significant factors identified within macro-environment analysis include continuous changes in wine production technology. Here we can expect that in the future, there will grow the use of PET bottles, which could replace the classical glass bottles, just as it happened in the soft-drinks production industry. Changes happened also in the field of legislature, and were connected with updating the law on winegrowing and wine production, change of the VAT to 19 %, cancellation of the consumption tax on wine or new titles of subsidies.
Also the buyer behaviour goes through a gradual development and it is influenced by many factors. Therefore the paper includes statistical evaluation of dependence between the average monthly wages and wine consumption. Calculated values show a semi-strong positive linear dependence of these two factors.

The influence of the stage of maturity of alfalfa on the chemical composition and in sacco digestibility was studied in a laboratory experiment. Alfalfa plants were analysed in 8 vegetation stages harvested in regular intervals before the beginning of bud setting until the fall of blossoms. The contents of nitrogenous substances, fat, crude fibre, ADF, NDF, Ca, P, Na, K and Mg were determined in the samples, and using the in sacco method also the organic matter digestibility in the rumen. Further we assessed the energy content and calculated the N-free extractives (BNLV) value. In some stages the chemical changes were monitored in the whole plant. It was discovered that during vegetation there was a statistically significant increase in the crude fibre content and in the ADF and NDF fractions and a reduction in nitrogenous substances. A strong negative correlation was detected between the stage of maturity of alfalfa and content of crude protein and net energy for lactation (r = -0.97 and r = -0.92, respectively). In the individual stages of vegetation the differences in the content of nitrogenous substances, fibre and fat were statistically significant (P < 0.05). The statistically highest content of crude protein (28.97%) was detected in the first stage before bud setting and the lowest (11.97%) in the stage after the fall of blossoms. Later vegetation also had a stronger depressive effect on the content of fat and NEL. The organic matter digestibility (P < 0.05) was the lowest in alfalfa in the last stage of sampling (62.6%) when it reached a mere 85.99% of the digestibility at the beginning of bud setting. The highest organic matter digestibility (72.80%) was detected in a sample of young alfalfa prior to bud setting. In the experiment we confirmed a strong and negative correlation (r = -0.97) between the crude fibre content and organic matter digestibility. The correlation was also strong between the stage of maturity of alfalfa and the content of magnesium (Mg).