Resumo

GALARZA, Esteban Martín et al. Concentración plasmática de zinc en vacas de cría de la cuenca deprimida del río Salado. Analecta vet. [online]. 2021, vol.41, n.2, e057. ISSN 1514-2590.  http://dx.doi.org/https://doi.org/doi.org/10.24215/15142590e057.

Zinc (Zn) is an essential micromineral and its deficiency can affect the productive and reproductive efficiency in cattle. A multicenter observational study was carried out to evaluate Zn status in breeding cows at Salado River Basin (Buenos Aires, Argentina). The study included 110 cow-calf operations, in which blood samples (n = 1078 cows) were collected and analyzed by using atomic absorption spectrophotometry. Cows were classified according to their plasma Zn concentration values as physiologically adequate (≥ 90 µg/dl), marginal (between 80 to 89 µg/dl) and deficient (<80 µg/dl). A descriptive statistical analysis was performed using the SAS program MEANS procedure. The average plasma Zn concentration was 102.8 ± 16.4 µg/dl and 31.4 % of the cows in each herd showed marginal or deficient values. The highest percentage of marginal or deficient cows was recorded in winter (47.7 %), while the lowest percentage was recorded in autumn (21.3 %). These results show that there is Zn deficiency in cow-calf operations of Salado River Basin.

Palavras-chave : zinc; cattle; mineral deficiency.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )