- Volume 11 Issue 2
Plasma and milk samples of 24 periparturient Holstein cows were collected from 1 week prepartum to 10 week postpartum to measure the effects of parity on mineral status in periparturient cows. Cows were fed mainly mixed ration with the concentrate supplement during the experimental period to meet nutrient requirement of dairy cattle for TDN, protein, and minerals, Plasma Ca of cows decrease as parity increased, but plasma Mg, K, Fe and Zn were lowest in the first lactation cows. Plasma inorganic P, Na, and alkaline phosphatase were not affected by the parity. Plasma Ca, Fe and Zn of cows decreased at parturition, but plasma Mg increase. Plasma Ca of the first, second and third and more lactation cows at parturition were 9.65, 8.96, and 8.92 mg/dl, respectively. Colostral Ca, P, Mg, Na, and Zn were highest in the first lactation cows, although colostrum yield was lower. Milk yield from 1 to 10 weeks postpartum was lowest in the first lactation cows, but mineral concentrations in milk were not affected by the parity.
- Relationship between parity and mineral status in dairy cows during the periparturient period vol.74, pp.3, 2003, https://doi.org/10.1046/j.1344-3941.2003.00107.x
- Genetic parameters for milk mineral content and acidity predicted by mid-infrared spectroscopy in Holstein–Friesian cows vol.9, pp.05, 2015, https://doi.org/10.1017/S1751731114003255
- Phenotypic characterisation of major mineral composition predicted by mid-infrared spectroscopy in cow milk pp.1828-051X, 2017, https://doi.org/10.1080/1828051X.2017.1398055