Metabolismo y deficiencia de zinc en bovinos

ROSA DE, FAZZIO LE, PICCO SJ, FURNUS CC, MATTIOLI GA

Analecta Veterinaria

FCV-UNLP

Lugar: La Plata; Año: 2008 vol. 28 p. 34 - 44

0365-5148

Zinc is an essential trace mineral due to its structural, catalytic and regulatory roles. Gene expression, antioxidant defenses and food intake are the most affected functions during Zn deficiency. Forage and grains produced on deficient soils may not reach the animals´ Zn deficiency. Forage and grains produced on deficient soils may not reach the animals´ ing Zn deficiency. Forage and grains produced on deficient soils may not reach the animals´ requirements, especially in categories with high needs. Intestinal Zn absortion is regulated by the animals needs, there is no organic storage of Zn and its elimination occurs through feces. Zn requirements are controversial and variable, they increase during peak lactation and stress. Productive losses due to Zn deficiency include, in a decreasing order, immunological failure, low growth rates, reproductive failure and high incidence of foot diseases. In Argentina, there are reports of diagnosis and treatment-related response, although neither the deficiency areas nor their consequences have been characterized, which would improve sanitary control. In the present situation, it would be useful to improve diagnosis along with a supplementation program of 30 ppm in growing animals, with an strategic increases during stress situations such as calving, weaning, feedlots income and demanding lactations.