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Evaluating the Route of Administration of an Exogenous Microbial Enzyme for Broiler Chickens

Department of Animal & Poultry Science, University of Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa; Phone: +27 33 260 5477; Fax: +27 33 260 5067

Correspondence: R. M. Gous, E-mail:Gous{at}nu.ac.za

A study was conducted to evaluate the efficacy of a multi-carbohydrase enzyme, Roxazyme G2, when administered in water or in feed to broiler chickens. The enzyme generally improved (P < 0.01) weight gain and feed conversion efficiency (FCE). Supplying the enzyme in water resulted in a slight reduction in feed intake as well as an increase in weight gain and FCE compared with values obtained when the enzyme was supplied in feed. Between 7 and 14 d of age, the feedsupplemented treatment improved (P < 0.05) weight gain and FCE more than did supplementationin water.

The results showed that microbial enzymes whose activities are adversely affected by high temperature feed extrusion can be supplied to poultry via water.

Key Words: Broiler chickens • exogenous enzyme • Roxazyme • weight gain • feed conversion efficiency