| Autor: |
de Vitt MG; Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Signor MH; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Corrêa NG; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Breancini M; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Wolschick GJ; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Klein B; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Silva LEL; Department of Food Science, Universidade Federal de Santa Maria (UFSM), Santa Maria 97105-900, RS, Brazil., Wagner R; Department of Food Science, Universidade Federal de Santa Maria (UFSM), Santa Maria 97105-900, RS, Brazil., Jung CTK; Department of Animal Science, Universidade Federal de Santa Maria (UFSM), Santa Maria 97105-900, RS, Brazil., Kozloski GV; Department of Animal Science, Universidade Federal de Santa Maria (UFSM), Santa Maria 97105-900, RS, Brazil., Bajay MM; Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil., Schroeder GS; Faculty IELUSC, Joinville 89201-270, SC, Brazil., Milarch CF; Faculty IELUSC, Joinville 89201-270, SC, Brazil., Da Silva AS; Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil.; Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó 89815-630, SC, Brazil. |
| Abstrakt: |
This study's objective was to evaluate whether adding a combination of phytoactive (microencapsulated essential oils, minerals, turmeric extract, tannin, prebiotic, and probiotic) to the feed of lactating Jersey cows positively affects the production, composition, and quality of milk, rumen environment, and animal health. Fourteen Jersey cows were divided into two groups (control and phytogenic) for an experiment with two lactation phases of 45 days each (early lactation and mid-lactation). During the experiment, milk production was higher at various times in cows that consumed phytoactive, and these animals had the best feed efficiency. In mid-lactation, phytoactive intake increased nutrient digestibility. The number of lymphocytes in the blood is reduced when cows consume phytoactive substances. Globulin levels increased in these cows fed with the additive, which may be related to a higher concentration of immunoglobulins, especially IgA. Cows fed phytoactives had lower ceruloplasmin and haptoglobin concentrations. Lower serum lipid peroxidation, associated with greater glutathione S-transferase activity, is a good health indicator in cows that consume phytoactive substances. The higher concentration of volatile fatty acids was due to the higher proportion of acetic acid in the ruminal fluid combined with lower butyric acid. Somatic cell counts in milk were lower in cows that consumed phytoactives during mid-lactation, as well as the effect of the treatment on Streptococcus spp. (lower in cows that consumed the additive). We conclude that consuming the additive benefits cows' health modulates rumen fermentation and nutrient digestibility, and positively affects milk production and quality. |
