Resumen

Crianza artificial de terneros de tambo utilizando sustitutos lácteos de distinto contenido energético. RIA. Rev. investig. agropecu. [online]. 2016, vol.42, n.1, pp.87-92. ISSN 1669-2314.

The aim of this study was to evaluate the growth performance of male calves fed 3 different liquid diets plus a commercial feed. Milk replacers used were: 1) conventional milk replacer, similar to those commonly found in the market (20 % CP and 15 % EE), and 2) one with higher fat content (20 % CP and 20 % EE). The control group was fed with whole milk. We evaluated time to weaning, daily live weight gain (DLWG), dry matter intake (DMI) nutrients intake, and conversion efficiency. We used 21 Holstein male calves from a dairy farm in Luján (Buenos Aires, Argentina) (7 per treatment) reared outside with bucket system. Weight gain measurements were made every 21 days, solid and liquid feed intakes were measured daily. The results show no significant differences between treatments for any of the variables analyzed, except the conversion efficiency (kg DM/ kg total weight gain) and daily weight gain between days 3 and 24, which was higher for control group in both cases. We conclude that although milk replacers evaluated fail to equate conversion and DLWG compared with the control group during the first 24 days, all treatments had a similar performance overall.

Palabras clave : Milk replacer; Fat; Daily gain; Conversion efficiency.

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