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Acta Scientiarum. Animal Sciences

versão impressa ISSN 1806-2636versão On-line ISSN 1807-8672

Resumo

ARAUJO, Thalita Polyana Monteiro et al. Gir and Guzerat cow milk production and composition according to lactation stage, somatic cell count, physiological state and body condition. Acta Sci., Anim. Sci. [online]. 2018, vol.40, e39352.  Epub 16-Ago-2018. ISSN 1807-8672.  http://dx.doi.org/10.4025/actascianimsci.v40i1.39352.

This work was realized to evaluate lactation stage, physiological state, somatic cell count (SCC) and body condition score (BCS) on production and composition of cow's milk from Gir and Guzerat breeds were studied. Ninety-eight cows were analyzed and classified according to their physiological state, lactation stage, SCC and BCS. Milk production was weighed monthly to obtain production data. Composed samples were collected in vials containing preservatives and sent to the laboratory for analysis. Data were used for statistic descriptive analysis and analysis of variance. Higher milk production in the first 60 days of lactation was observed. Fat, protein and total solids concentration increased according to the increase of days in milk; while lactose concentration decreased. Higher levels of fat, protein and total solids in milk of non-pregnant cows were observed; while pregnant cows had higher daily production and higher lactose content in their milk. Higher lactose levels in milk were observed in animals with lower SCC. The BCS had no effect on milk composition or on somatic cell count. Zebu cow milk production and composition are influenced by lactation stage, physiological state and SCC.

Palavras-chave : gestation; milk quality; body reserve; zebu.

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