Yazar "Kal, Yavuz" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    The effects of nutritional periods on oxidative stress levels in lambs during birth-weaning period
    (Afyon Kocatepe Üniversitesi Veteriner Fakültesi, 2022) Budak, Duygu; Doğan Daş, Besime; Çamkerten, Güzin; Kal, Yavuz
    In this study were used 40 newborn singleton Akkaraman and Merino lambs with 4 trial groups consisting of selected 10 lambs homogeneous according to race and gender. Trial was carried out 100 days, covering 5 feeding periods with 21-day periods the first application is on the 14th day from the birth of lambs. The lambs were fed with lamb starter feed for the first two months, then with lamb grower feed ad-libitum and 250 g/day/head dry alfalfa hay. At the end of the study; it was determined that the lowest total antioxidant status (TAS) was in Akkaraman male lambs, the highest was in Merino’s female, and it was found higher in Merino females than males (P<0.05). There was no difference between the groups in terms of total oxidant status (TOS) and native thiol (NTL), during the trial (P?0.05). Oxidative stress index (OSI) obtained from Akkaraman lambs was found to be higher than Merino, lower OSI was reached in female Merino's, and total thiol (TTL) were increased in Merino male lambs compared to Akkaraman (P<0.05). It was concluded that the Merino had better adaptation to feeding after weaning than the Akkaraman.
  • Küçük Resim
    Öğe
    Thyme (Thymus vulgaris L.) essential oil supplementation: impact on performance, egg quality, serum, and faecal mineral content in laying partridges
    (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (CSIC-INIA), 2025) Başer, Eyüp; Sevim, Behlül; Akbulut, N. Kürşad; Çufadar, Yusuf; Halıcı, İbrahim; Kal, Yavuz; Tekik, Havva; Gültekin, Meltem; Sarmiento-García, Ainhoa
    This study evaluated the impact of thyme (Thymus vulgaris L.) essential oil (TEO) supplementation on performance, egg quality, and serum and faecal mineral composition in chukar partridges (Alectoris chukar). Area of study: Türkiye. Material and methods: Ninety-layer partridges, aged 32 weeks, were randomly assigned to five groups. Within each group, there were six replicates with three birds/replicate. The experimental design included a control group receiving a basal diet (0 mg/kg TEO) and four treatment groups with diets supplemented with TEO at 50, 100, 150, and 200 mg/kg over 56 days. Main results: The results showed no significant differences in performance parameters among the groups (p>0.05). However, egg production and mass were significantly higher in the 50 mg/kg TEO group than in the control group (p<0.01). Additionally, eggshell thickness and yolk index were improved in the 50 mg/kg group compared to the 100 mg/kg group (p<0.05). Serum and faecal mineral compositions did not differ significantly among the experimental groups (p>0.05). Research highlights: These results suggest that incorporating TEO at 50 mg/kg into the diet of chukar partridges may be optimal, as higher concentrations could potentially interfere with nutrient absorption and negatively affect partridge attributes. Nevertheless, further research is needed to elucidate the mechanisms of action of TEO´s active ingredients in partridge feed.