Cilt:67 Sayı:04 (2020)

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https://dspace.ankara.edu.tr/handle/20.500.12575/75313

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Browsing Cilt:67 Sayı:04 (2020) by Subject "Broiler"

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    The effects of perch cooling on performance, carcass, and meat quality characteristics and behaviour of broilers reared at high temperatures with different litter thicknesses
    (Ankara Üniversitesi, 2020-09-01) Fidan, Evrim Dereli; Türkyılmaz, Mehmet Kenan; Nazlıgül, Ahmet; Kaya, Mehmet; Veteriner Fakültesi
    The aim of the present study was to investigate the effects of cooled perch and litter thickness on performance, meat quality, carcass, and behaviour traits on broilers reared at high environmental temperatures. A total of 459 1 day-old male broiler chicks were randomly assigned to nine treatment groups based on the perch treatment (no perch, non-cooled perches, cooled perches) and litter thicknesses (1, 7 and 14 cm) with three replicates. Body weight was higher in broilers reared at cooled perch group at 6 wks (P<0.05). Body weight of chickens reared under the 1 cm thickness was found higher than the 7 and 14 cm of litter thickness chickens at 6 wks. Live and carcass weights, total breast and drum weights were higher in broilers reared at 1 cm litter thickness. The perch-contact incidence of chickens reared under the cooled perch was found higher than the non-cooled chickens for all hours at 6 wks. In conclusion, it is indicated that perch cooling and 1 cm of litter thickness have a beneficial effect on broiler performance exposed to high temperatures.
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    The effects of thyme essential oil and vitamin combinations on performance, carcass quality and oxidation parameters in broilers exposed to heat stress
    (Ankara Üniversitesi, 2020-09-01) Sarıözkan, Savaş; Güçlü, Berrin Kocaoğlu; Konca, Yusuf; Aktuğ, Eray; Kaliber, Mahmut; Beyzi, Selma Büyükkılıç; Şentürk, Meryem; Veteriner Fakültesi
    This study aims to determine the effect of thyme essential oil (TEO) and a combination of TEOwith different vitamins (A, C and E) on performance, carcass quality, oxidation parametersin broilers exposed to heat stress (HS). A total of 300, 21 days old, male Ross-308 chicks were distributed in six experimental groups with five replicates. The broilers in HS groups were exposed to 34oC for nine hours per day between 21 and 41 days of the experiment. The experimental groups were as follows: 1: Thermoneutral control (TNC, 22oC), 2: Heat stress control (HSC, 34oC), 3: TEO(300 mg/kg TEO, 34oC), 4: TEO+ Vit C (300 mg/kg TEO+ 250 mg/kg Vit C, 34oC), 5: TEO+ Vit E (300 mg / kg TEO+ 250 mg/kg Vit E, 34oC) and 6: TEO+ Vit A (300 mg / kg TEO+ 15000 IU / kg Vit A, 34°C). As a result, it was determined that HS significantly reduced live weight (LW), live weight gain (LWG), and feed intake(FI) values compared to the TNC group (P<0.05). Supplementation of TEOor TEOand vitamin (A, C, E) combinations to the feed of broilers exposed to HS had no significant effect on performance, carcass quality, carcass part yields, and serum parameters. Economically, the highest profitability was obtained in the TNC group (P<0.001), In conclusion, HS negativelyaffected the performance of broilers, and the supplementation of TEO+ Vit E to the diet had slightly reduced the adverse effects of HS.