Resumen

GENTILINI, F.P. et al. Performance and bone resistance of laying hens supplemented with Allzyme^® SSF in the diets. Arch. zootec. [online]. 2009, vol.58, n.224, pp.645-653. ISSN 1885-4494.

During 280 days, a study was run to evaluate the rol of an enzyme complex (Allzyme^® SSF) in terms of dietary energy reformulation on productive performance, egg quality and bone strength. 384 Hisex Brown layers divided in 10 productive cycles were used. A completely randomized experimental design was used and treatments consisted of T1: basal diet (control); T2: basal diet + Allzyme^® SSF (reformulated to 120 kcal ME/kg); T3: basal diet + Allzyme^® SSF (reformulated to 90 kcal ME/ kg); T4: basal diet + Allzyme^® SSF (reformulated to 60 kcal ME/kg); T5: basal diet + Allzyme^® SSF (reformulated to 30 kcal EM/kg) and T6: basal diet + Allzyme^® SSF (on top). Dietary treatments were a corn-soybean meal diet, with the inclusion of do Allzyme^® SSF (150 g/t). Evaluated variables were feed intake (CR), daily egg production (PDOV), feed conversion (CADZ, feed/dozen eggs), body weight (PC), body weight variation (PVPC), egg weight (POV), specific gravity (GE), egg yolk colour (CG), Haugh units (UH), albumen weight (PCL), Yolk weight (PG), shell weight (PCS), shell thickness (ECS) and bone strength (RO). Data were evaluated using ANOVA and Tukey test to separate the means (5%) and simple and multiple contrasts analysis. Birds fed T6 showed lower egg weight and albumen weight. The remaining variables were not affected by dietary treatments. These results indicate that adding Allzyme^® SSF on top of a diet brings about a reduction in consumption, without affecting egg production and bone strength.

Palabras clave : Enzyme complex; Productivity; Tibiotarsus.

        · resumen en Portugués     · texto en Portugués     · Portugués ( pdf )