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    A novel source of calcium: effects of calcium pidolate concentration on egg quality in aged laying quails (Coturnix coturnix Japonica)
    (Cambridge University Press, 2022) Sarmiento-García, A.; Gökmen, S.A.; Sevim, B.; Olgun, O.
    Calcium content in the diet can affect egg quality and production in aged birds. Calcium pidolate is a new form of calcium supplementation in poultry diets, which favours the absorption of this mineral. The current study was conducted to evaluate the effect of dietary calcium pidolate concentration in the diets of aged laying Japanese quails. A total of 120 female quails (27 weeks old) were assigned to four treatment groups, each with six replicates of 5 quails per pen. In the 10-week trial, quail diets were supplemented with calcium pidolate at four concentrations (0, 0.25, 0.50, and 1.00 g/kg), providing 25.1 g/kg, 25.4 g/kg, 25.8 g/kg, and 26.5 g/kg calcium, respectively. As a result of this study, body weight (BW), feed intake (FI), and feed conversion ratio (FCR) did not change with the concentration of calcium pidolate (p>0.05). In contrast, albumen and yolk index decreased as calcium pidolate level increased (p<0.05). Moreover, calcium pidolate at a concentration of 0.50 g/kg resulted in the greatest egg production, eggshell breaking strength and eggshell thickness (p<0.05), while above these levels the factors studied were negatively affected. According to these results, the optimal concentration of calcium pidolate in the diets of aged laying quails was 0.50 g/kg.
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    Effects of dietary betaine and protected calcium butyrate supplementation on growth performance, blood biochemical status, and meat quality in growing Japanese quail (Coturnix coturnix Japonica)
    (Polish Academy of Sciences, Committee of Veterinary Sciences, 2023) Gümüş, E.; Sevim, Behlül; Olgun, O.; Küçükersan, S.
    This study aimed to evaluate the impact of betaine (Bet) and protected calcium butyrate (PCB) supplementation individually and together on the performance, carcass traits, blood biochemistry, and meat quality of growing Japanese quails ( Coturnix coturnix Japonica) from 1 to 42 days old. 144 one-day-old unsexed Japanese quails were randomly assigned to four dietary treatments with six replicates each. All birds were fed a maize-soybean meal diet for 42 days. The control group received no feed additives, while the treatment groups received 1.2 g/kg Bet, 1.0 g/kg PCB, or a combination of both in their diets. The results indicated that Bet and PCB supplementation individually and together did not differ performance, relative weights of heart, gizzard, proventriculus, bursa of Fabricius and pancreas, water holding capacity (WHC), cooking loss (CL), blood biochemical values except for glucose and triglyceride. Bet supplementation significantly increased relative liver weights, while PCB supplementation decreased glucose levels in serum. Moreover, carcass yield was increased and triglyceride value in blood serum, malondialdehyde (MDA), and the pH levels of breast meats both on the 1st and 30st day of post-mortem were decreased in all treatment groups. Therefore, based on these results, the combination of betaine and butyrate improves both carcass yield and meat quality in growing Japanese quails. More research is needed to determine the impact of betaine and butyrate on the structure of amino acids in meat, antioxidant enzyme activity, and the immune system in poultry.