The Journal of veterinary medical science · 2024
Blood 25-hydroxyvitamin D3 concentration of Japanese Black cattle at two farms with different rearing environments, Kagoshima prefecture, Japan.
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Otomaru Konosuke, Saita Hiroto, Usa Amane, Tsugawa Naoko, Yamada Mai, Furukawa Masanori
Аннотация
Forty-two Japanese Black cattle on two farms in Kagoshima prefecture, Japan were used in this study. The rearing style of farm A was in a dark barn with a large roof to block sunlight (n=21). The rearing style of farm B was grazing, and exposed to direct sunlight (n=21). Blood sampling was performed twice on the same cattle in August 2022 (summer) and February 2023 (winter). As the results, the serum 25(OH)D3 concentrations were significantly lower in cattle of farm A than in cattle of farm B (P<0.01), and were significantly lower in winter season than in summer season (P<0.01). These results showed that there were differences in blood 25(OH)D3 concentrations between the farms or seasons.