Effect of milking time on yield, composition, and antimicrobial components of milk in lactating goats.

Autor: Liang ZL; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan., Nii T; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan., Suzuki N; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan., Tsugami Y; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan., Sugino T; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan., Isobe N; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan.
Jazyk: angličtina
Zdroj: Animal science journal = Nihon chikusan Gakkaiho [Anim Sci J] 2024 Jan-Dec; Vol. 95 (1), pp. e13970.
DOI: 10.1111/asj.13970
Abstrakt: Various studies have attempted to improve the milk yield and composition in dairy animals. However, no study has examined the effects of milking at different times on milk yield and composition. Therefore, this study aimed to compare the yield, composition, and antimicrobial components of milk obtained from milking at different times in lactating goats. Eight goats were milked once daily at different times for three consecutive weeks (first week: 06:00 h; second week: 09:00 h; and third week: 12:00 h). The light ranged from 06:30 to 19:00 h. Milk and blood samples were collected once a day during milking time. Milking at 09:00 h resulted in a significantly higher milk yield than that obtained after milking at 06:00 and 12:00 h. Prolactin levels in plasma and the fat, Na + , β-defensin, and S100A7 (antimicrobial component) levels in milk were the lowest in the 09:00 h milking. These results indicate that milk yield, composition, and antimicrobial components can be affected by milking time, which may be related to the altered concentration of prolactin in the blood. These findings provide a rational basis for achieving maximal milk production with strong immunity by changing to a more effective milking time.
(© 2024 The Author(s). Animal Science Journal published by John Wiley & Sons Australia, Ltd on behalf of Japanese Society of Animal Science.)
Databáze: MEDLINE
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