Przeglądaj wg Autor "Adamski, Maciej"

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  • Miniatura
    PozycjaOpen Access
    The Impact of the Application of Brewer's By-Product Roasted Barley Husks on Selected Parameters of Rumen Fermentation of Dairy Cows. In Vitro Study
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2019) Formella, Rachela Anna; Pecka-Kiełb, Ewa; Zawadzki, Wojciech; Adamski, Maciej; Department of Cattle Breeding and Milk Production, Institute of Animal Breeding, Wroclaw University of Environmental and Life Sciences, Poland; Department of Animal Physiology and Biostructure, Institute of Animal Physiology, Wroclaw University of Environmental and Life Sciences, Poland; Department of Animal Physiology and Biostructure, Institute of Animal Physiology, Wroclaw University of Environmental and Life Sciences, Poland; Department of Cattle Breeding and Milk Production, Institute of Animal Breeding, Wroclaw University of Environmental and Life Sciences, Poland
    The aim of the study was to evaluate the effect of brewer's by-product roasted barley husks additive (RBH) on the cow's rumen fermentation process, in in vitro conditions. Ruminal fluid for the research was collected from 9 dairy cows selected on the basis of analogues. Animals were fed total mixed ratio (TMR). The substrates for in vitro experiment were composed on the basis of TMR. Control substrate contained only TMR. Substrates D1, D2, D3 contained TMR with the addition of respectively: 5, 10 and 15% of dry matter of RBH. Substrate D4 contained only RBH. Samples of ruminal fluid were incubated for 8 hours, in anaerobic conditions, at 39°C. A desirable effect of applying RBH was observed in groups D3 and D4 – the production of volatile fatty acids (VFA) increased. Furthermore, positive effects were observed in groups D2 and D4 – acetic acid production decreased (by up to 7%). Reduced methane production (up to 10%) was observed in experimental groups which indicates that animals would have smaller energy losses. Most beneficial changes in the VFA profile and the highest growth of non-glucogenic and glucogenic acids ratio (NGR) were recorded in D3 group samples. Positive results in this matter are promising as the roasted barley husks are a by-product of beer production and its usage has both economic and ecologic benefits. Obtained results in the in vitro study are the prerequisites to carry out an in vivo experiment.
  • Miniatura
    PozycjaOpen Access
    The Value of FPR Indicator in Dependence of Dairy Cows’ Body Condition in the First Month of Lactation
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2020) Adamski, Maciej; Pacoń, Jakub; Department of Cattle Breeding and Milk Production, Wrocław University of Environmental and Life Sciences, Poland; Department of Cattle Breeding and Milk Production, Wrocław University of Environmental and Life Sciences, Poland
    The research was performed on 100 cows of Black and White Polish Holstein-Friesian breed. The studied cows were under a visual and tactile evaluation of body condition using a BCS (Body Condition Scoring) method performed on the day of parturition as well as 30th day of lactation. The observation results of the body condition changes during that period were juxtaposed with FPR. The value of that indicator was determined on the base of control milking performed on the 30th day of lactation. The aim of the research was defining the relationship between the value of FPR and the changes of cows’ body condition between the day of parturition and 30th day of lactation. The statistically significant differences (P < 0.05) of FPR value in dependence of the changes in cows’ body condition between the parturition day and 30th day of lactation were determined.