Wydanie 328(39)3 2016

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https://oa.zut.edu.pl/handle/20.500.12539/708

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Przeglądaj Wydanie 328(39)3 2016 wg Autor "Banaszkiewicz, Teresa"

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    Effect of application of enzymes to broiler diets containing rapeseed cakes on performance and postslaughter results
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2016) Banaszkiewicz, Teresa; Biesiada-Drzazga, Barbara; Department of Tourism and Recreation, Siedlce University of Natural Sciences and Humanities; Department of Breeding Methods and Poultry and Small Ruminant Breeding Siedlce University of Natural Sciences and Humanities
    The aim of the study was to evaluate the effect of application of xylanase or xylanase and phytase to diets containing rapeseed cakes of ‘Kana cv.’ on performance, carcass traits, physico-chemical parameters of meat and bone and digestibility of diets. Experiment 1 (growth trial) was carried out on 90 one-day-old broilers Ross 308, which were divided into three groups. The chickens were fed diets that contained 15% (starter – 1–21 days) and 20% (grower – 22–42 days) of rapeseed cake. The control diet (RC) for first group was without enzymes, diet for second group RC(X) contained enzyme preparation with endo-1,4-β- xylanase at the level of 0.3 g ∙ kg–1 (min. 1000 FXU/g). The third diet – RC(X + PHY) contained xylanase and enzyme preparation contained phytase in the amount of 0.35 g ∙ kg–1 (min 2500 FYT/g). At the age of 42 days, six chickens from each group were slaughtered. In the experiment 2 (on 60 broilers) the digestibility of diets from the experiment 1 on broilers at 3 week of life (starter diets) and at 5 week (grower diets) was carried out. Obtained results showed the tendency to increase of body weight and decrease of feed conversion after application of enzymes to the wheat-rapeseed diets. Less content of skin with subcutaneous fat in carcasses of broilers fed diets with enzymes, significant in simultaneous introduced xylanase and phytase, and increase of protein content in leg muscles was stated. Simultaneous introduced of xylanase and phytase (non significant) increased the digestibility of total phosphorus in grower mixtures and the crude ash and total phosphorus contents in bones.