Blood concentrations of calcium, phosphorus and magnesium and dietary cation-anion difference in dairy cows

Silva, Jerberson Hoffmann Da; Contreras, Laura Victoria Quishpe; Ponath, C.F.; Bondan, Carlos; Costa, Márcio Machado; González, Félix Hilario Díaz

doi:10.1590/1678-4162-12774

Cited by 1 publication

(1 citation statement)

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“…Magnesium is absorbed in the rumen, and its metabolism is connected to other trace minerals. In this study, calcium and magnesium exhibited similar variations, with minimum values observed at one week postpartum and maximum values found at one month postpartum (Silva et al., 2023). In addition, a positive and statistically significant correlation between magnesium and calcium concentration was identified at four weeks postpartum in primiparous cows; animals with high concentrations of magnesium and calcium showed a reduced calving interval.…”

Section: Discussionsupporting

confidence: 75%

Association between serum mineral levels and reproductive performance in primiparous dairy cows during the peripartum period

Muiño,

Castillo,

Hernandez

et al. 2024

Reprod Domestic Animals

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To the best of the authors' knowledge, no study has previously investigated whether the concentration of minerals is related to reproductive outcomes in primiparous cows. For this reason, two objectives were set in the present study: (i) to assess serum mineral levels, macrominerals, and trace elements during the transition period (period of high nutritional requirements) in primiparous cows, considering reproductive efficiency, and (ii) to address if the serum mineral levels of primiparous cows are related to reproductive efficiency. Blood samples were taken (i) one month before calving, (ii) one week before calving, (iii) one week postpartum, and (iv) one month postpartum. At the beginning and the end of the study, a body condition score (BCS) was assigned to each lactating cow with no clinical signs of disease. The difference between one month before and one month after calving was the body condition loss (ΔBCS). Optimal prepartum concentrations of K and Cl were associated with fewer days open and a shorter interval calving. Furthermore, macrominerals in the serum decreased immediately after calving (one week) but recovered at one month postpartum. In contrast, the highest concentration of trace elements was found at one week postpartum. Primiparous cows with higher postpartum Se, Mn, Co, and Mo concentrations exhibited better reproductive efficiency, and the concentrations of trace elements in serum were correlated with interval calving and the number of inseminations. Finally, primiparous cows with a greater ΔBCS (at least one point) in period 4 exhibited both a longer calving interval and a greater number of days open. In summary, this study showed, for the first time in primiparous cows, that the concentration of some serum minerals not only plays a crucial role during the transition period but is also related to crucial reproductive parameters, such as interval calving and days open.

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Section: Discussionsupporting

confidence: 75%