Browsing by Author "Acar, Aykut"

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    The effects of different glucose precursors on milk production and composition in dairy cows
    (Bursa Uludağ Üniversitesi, 2023-01-22) Altaş, Tolga; Tepe, Atakan; Yıldırım, Ramazan; Acar, Aykut; Çağlıcan, Cantuğ; Gençoğlu, Hıdır; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Hayvan Besleme ve Beslenme Hastalıkları Anabilim Dalı.; 0000-0003-1067-2874
    The aim of this study is to investigate the effects of glucose precursors on blood parameters, milk yield and composition in dairy cows. For this study, 26 multiparous and 34 primiparous Holstein cows were used in randomized block design to evaluate the feeding glycerol (G), propylene glycol (PG), and water (C) from 7 d prepartum to 21 d in milk (DIM). Treatments were 300ml water (C), 450 ml glycerol (G), and 300 ml propylene glycol were drenched after morning feeding. Milk yields were recorded as daily, milk samples were analyzed for fat, protein, lactose from all cattle for two consecutive days every week compositions until the 100 DIM. In other hand, blood samples were taken for glucose at last week of gestation, day calving, week 1, 2 and 3 in postpartum. There was no difference between the groups in glucose levels. However, milk yield of C (35.06 L/day) group was 1 L higher than G (34.18 L/day) group and 1,5 L higher than PG (33.46 L/day) group (P<0,05). Milk fat was found to be higher in PG group cows (3.67%) compared to C (3.44%) and G (3.46%) cows (P<0.05). However, milk proteins of the C (3.32%) group were higher than the PG (3.15%) group. Milk yield and milk protein were found to be higher in the untreated C group than in the G and PG groups, and differences were found between the groups in terms of milk fat. It was concluded that there is a need for further investigation of the effects of glucose procurers such as G and PG, especially on the rumen.
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    Evaluation of the effects of different natural dietary feed additives on performance and intestinal histomorphology in quails
    (Hellenic Veterinary Medical Soc, 2022-07-01) YEŞİLBAĞ, DERYA; Abdullahoğlu, Esra; Ürkmez, Emin; Acar, Aykut; Kara, Mert; Asmaz, Deniz; Bursa Uludağ Üniversitesi/Veteriner Fakültesi.; 0000-0003-0042-4156; O-9669-2018
    The aim of the present study was to investigate the influence of a commercial probiotic and a commer-cial essential oil blend and their mixture, as a natural feed additive, on growth parameters live weight (LW), live weight gain (LWG), feed intake (FI), feed conversion ratio (FCR), carcass yield (CY) and small intestinal histomorphology of quails. A total of 200 1-day-old Japanese (Coturnix coturnix Japonica) quails, including both males and females, were divided into four groups containing 50 quails and treated as follows: (1) a control treatment without medication (2) 18 g ton-1 probiotic; (3) 300 g ton-1 essential oil blend and (4) 18 g ton-1 probiotic plus 300 g ton-1 essential oil blend. Each experimental group consisted of 5 replicated groups. The results of the research show that the additives added to quail diets do not have a significant effect on the performance parameters of LW, LWG, FI and FCR (P > 0.05). However, sig-nificant differences were found in the CY, which is one of the performance parameters (P < 0.05). A probiotic addition of 18 g ton-1 (treatment 1) to the quail diet resulted in a significant increase in carcass yield (P < 0.05). Moreover, the addition of natural feed additives such as probiotics, essential oil blends and mixture to quail diets caused significant (P < 0.001) increases in villus heights and crypt depth in the duodenum and ileum segments. In addition, significant enlargements were found in the villus surface area in the experimental groups compared to the control group (P < 0.05). In conclusion, in this study, it was determined that the addition of feed additives, which are developed as an alternative to antibiotics to the quail diet did not have a negative effect on performance and caused significant differences in the effective parameters in the evaluation of intestinal health.