Efecto de paredes celulares (Saccharomyces cerevisiae) en el alimento de pollo de engorda sobre los parámetros productivos

Abstract

Two experiments using broiler chicks were done to evaluate productive arameteres and mortality at 49 d of age with addition of Saccharomyces cerevisiae cell walls (CW), with or without an antibiotic growth promoter (Avilamycin). The first assay included 3,000 chicks in six randomly-distributed treatments: Negative control (NC), Positive control (PC), NC + 0.5 kg/t CW, 1.0 kg/ t CW, 1.5 kg/t CW, and PC + 1.0 kg/t CW. The second included 1800 broiler chicks in six randomly-distributed treatments: NC, PC, NC + 0.5 kg/t CW, 0.25 kg/t CW, PC + 0.5 kg/t CW, and PC + 0.25 kg/t CW. No significant effects (P>0.05) were observed in feed consumption and mortality. Cell wall levels of 0.5 kg/t were enough to achieve a response competitive with that of AGP's, with similar results (P>0.05) in body weight and feed conversion. Joint addition of CW at different doses with the AGP (P<0.01) produced the best body weights in the first assay (2470, 2533, 2558, 2524, 2512 and 2591 g) and second assay (2589, 2660, 2657, 2647, 2714 and 2696 g). This effect was reflected in feed conversion for the first (1.93, 1.89, 1.88, 1.88, 1.88, 1.84 g/g) and second assays (2.0, 1.95, 1.93, 1.97, 1.93, 1.93 g/g). Addition of Saccharomyces cerevisiae cell walls is a promising growth promoter alternative in broiler chicks production.