Arquivo Brasileiro de Medicina Veterinária e Zootecnia
On-line version ISSN 1678-4162
BATISTA, C.G. et al. Use of ionic minerals or organic mineral complexes in the dry period of Holsteins cows. Arq. Bras. Med. Vet. Zootec. [online]. 2012, vol.64, n.5, pp.1232-1238. ISSN 1678-4162. http://dx.doi.org/10.1590/S0102-09352012000500022.
The effects of the use of complex minerals on the occurrence of retained placenta during pre-partum were valued on 135 Holstein cows from two or more deliveries. The animals were divided in two groups: ionic mineral (69 animals) and complexed mineral (66 animals). In 55 of these animals serum concentrations of imunoglobulin G (IgG), Zn and Cu and colostrum quality were also evaluated. The experiment was conducted in complete randomized split-plot design, serum IgG and trace minerals were evaluated by analysis of variance and used, respectively, Duncan's test and Fisher. The α error rate of 7% was accepted. There were no differences between groups for the occurrence of retained placenta, colostrum quality and serum concentrations of Zn and IgG (P>0.07), a difference was observed for Cu (P<0.07) concentrations. The IgG concentrations were different on the weeks pre partum evaluated (P <0.07).
Keywords : cupper; immunoglobulin; placenta retention; zinc.