[Determination of the serum levels of calcium, phosphorus, manganese, zinc and copper at peripartum in Holstein Friesian cows in Los Angeles zone]
1991
Sanhueza F, Javier
The Ca, P, Cu, Mn, and Zn serum levels were measured at three different peripartum periods on 77 Holstein Friesian cows from 7 dairy fields of Los Angeles area. The animals were blood sampled 2 or 3 weeks before calving, 2 or 3 weeks after calving, and 70 days post partum. The assessment of the P serum levels was achieved using the Merckotest method from Merck Laboratories. The remaining microelements levels were determined using the atomic absorption spectrophotometer. A relationship was established between the events observed at calving and production, and the serum levels of the obtained microelements. The results gathered in the three peripartum periods of sampling agree with the normal levels reported in the literature, except for the Mn level, which showed to be lower than the normal parameters. There were significant variations of the microelements levels at the three sampling; the Ca levels showed a significant decrease 70 days post partum, meanwhile the P and Zn levels showed a strong increase in that same period. The Cu level, as well as the Mn level, showed its highest level 2 or 3 weeks before calving. The metritis and dystocia cases observed in these animals showed no meaningful relationship with the obtained microelements serum levels. The PPL was significant related to the low Ca, P and Cu levels before calving, and to the low Mn level during the entire lapse. In the high production group of animals, it was observed that they arrived to calving with low mineral serum levels, which were to be reestablished at the puerperium period
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Instituto de Investigaciones Agropecuarias