Objectives of this study were to evaluate effects of milk production level and calving interval, resp. days open period length on the lactation curve parameters and milk production profitability. Data were obtained from Holstein dairy farm. From our results can be stated, that cows with the longest days open period length reached significantly the highest lactation persistence. Due to their ability to maintain high milk productivity after peak day, average daily milk yield was not in these cows, despite long lactation, lower than in cows with shorter lactations. From the economic point of view, milk production profitability with calving interval length decreased and with milk production level increased. Low profitability in cows with long days open period caused high replacement and fertility costs. Feeding costs despite expectations didn´t differ between these groups. All early lactating cows are fed with the same expensive concentrated feeding ration, thats why there is not possible to save feeding costs in high persistent cows with low milk production increase after calving

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The present work evaluates the collection of selected varieties and species of phenotypes Cydonia oblonga Mill, in the climatic and soil conditions of the foothills of Nízký Jeseník Mountains. The collection consisted of: 'Blanár'; 'BO-3'; 'Brna'; 'Buchlovice'; 'Hruškovitá'; 'Champion'; 'Ironda'; 'Izobilnaja'; 'Jurák'; 'Kocurova'; 'Leskovačka'; 'Mir'; 'Morava'; 'Muškátová'; 'Otličnica'; 'Pinter'; 'Selena'; 'Triumph'; 'Úspěch' and 'Vranja', planted in the Paseka municipality. The growth characteristics were monitored as were production quality, pollen germination, starting of selected phenological phases and the sensory features of raw fruit and jam were assessed. The temperatures and precipitation values of the chosen planting location were discovered to be close to the climatic values of Žabčice area. Considering the growth characteristics for the selected plantation area it appears the most suitable phenotypes are 'Brna' and cultivar 'Vranja'. Because of the possibility of late spring frosts, more suitable varieties for growing would be 'Champion'; 'Jurák' and 'Kocurova'. Due to the early termination of the vegetation the varieties 'Champion', 'Ironda', 'Leskovačka' and 'Muškátová' and phenotype' BO- 3' could also be recommended. In the assessed collection of sensory score, the best value was acheived by the variety 'Otličnica'. Other observed characteristics showed considerable variability. Under the climatic conditions, the successful cultivation of quince in the foothills of the Nízký Jeseník Mountains seems possible and in the future, quince could become a commercially exploited commodity in this area.