Resumen de Influencia del cereal y el nivel de inclusión de fibra en el pienso sobre la productividad en pollitas de 0 a 17 semanas de edad
M. Sidrach de Cardona, P. Guzmán, Beatriz Saldaña Mancebo, M.V. Kimiaeitalab, A. Pérez Bonilla, J. Garcia, G.G. Mateos
In total, 3,000 one-day-old brown-egg laying pullets were used to investigate the effects of the main cereal of the diet and the inclusion of 2 fiber sources at 2 levels of inclusion on performance from 0 to 17 wk of age. The feeding program consisted in 3 phases (0-5, 5-10, and 10-17 wk of age) with similar nutrient content. Two of the diets (in each of 3 feeding periods) differed in the main cereal used (corn vs barley) and the other 4 diets were similar to the corn diet but included 2 or 4% of either cereal straw or sugar beet pulp (SBP) at expense (wt:wt) of the whole diet. The main cereal of the diet did not affect any of the traits studied. From wk 0 to 17, BW gain was reduced (P = 0.10) by the inclusion of fiber in the diet, a reduction that tended to be more pronounced for the SBP than for the straw containing diet. Feed efficiency was reduced (P < 0.05) as the level of fiber in the diet increased. We conclude that the main cereal of the diet had no effects on pullet growth. The inclusion of additional fiber in the diet affected negatively pullet performance from 0 to 17 wk of age with the detrimental effects being more noticeable in the last phase of the rearing period and with SBP rather than straw.
