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The aim of this study was to assess the effect of the feeding season and the quantity of concentrates served on the course of rumen fermentation in dairy cows. The research included 42 cows (21 heads in summer and 21 heads in winter) of the black-and-white variety of the Polish Holstein-Friesian breed, aged from 2 to 5 years (lactations I-III) with an average milk yield per lactation of approximately...
W pracy przedstawiono wyniki badań dotyczących zbilansowania energetyczne-białkowego dawek pokarmowych, stosowanych w żywieniu krów mlecznych rasy Brown Swiss oraz Holsztyńsko-Fryzyjskiej w certyfikowanym gospodarstwie ekologicznym. Oceny zbilansowania dawek dokonano, porównując zawartość energii oraz białka ogólnego we wszystkich paszach, wchodzących w skład dawki pokarmowej, ze składem dawki obliczonej...
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