Efecto de la pollinaza fermentada en estado sólido en el cambio de peso de toretes en pastoreo

Abstract

Se realizo un ensayo de crecimiento con el objetivo de evaluar el efecto de la suplementación de la pollinaza fermentada (solida) en toretes en pastoreo, se utilizaron 32 toretes con un peso vivo (PV) promedio inicial de 234.3 ±.8 kg durante 107 días, distribuidos en dos tratamientos (T), tratamiento 1: Pastoreo + pollinaza fermentada y tratamiento 2: Pastoreo + pollinaza sin fermentar. Cada tratamiento tenía 4 corrales (repeticiones) con 4 animales por corral, se consideró al corral como una unidad experimental. El tratamiento (12 kg del suplemento base húmedo) se le suministró diariamente en el corral de 7:00 a 9:00, posteriormente, todos los animales salían a pastorear a la misma pradera. Los animales se pesaron cada mes durante tres días consecutivos. Se utilizó un diseño completamente al azar usando como covariable el peso inicial. La ganancia diaria de peso (GDP) fue de 0.811 y .780 para el T1 y T2, respectivamente, sin diferencias significativas en entre los tratamientos. Se encontró diferencias significativas en el consumo de materia seca (MS) del suplemento que fue 1.6 vs 2.2 kg/animal/d para T1 y T2 y del pasto que fue de 6.1 vs 5.7 kg de MS/animal/d, respectivamente. No se encontró diferencias en el consumo total de MS. Se concluye que la pollinaza fermentada estimuló el consumo de pasto. _______________ EFFECT OF CHICKEN LITTER FERMENTED IN SOLID STATE IN THE CHANGE OF WEIGHT OF BULLS GRAZING. ABSTRACT: In order to evaluate the effect of the supplementation of chicken litter fermented (solid) in bulls grazing, they were used 32 bulls with a weight alive (PV) initial average of 234,3 ±.8 kg during 107 days, distributed in two treatments (t), treatment 1: Grazing + chicken litter fermented and treatment 2: Grazing + chicken litter without fermenting. Each treatment had 4 corrals (repetitions) with 4 animal by corral, was considered to the corral like an experimental unit. Treatment (12 kg of supplement dry base was provided daily in the corral of 7:00 to 9:00, later, all the animal left to shepherd to the same prairie. The animal weighed every month during three days consecutive. Using as a at random covariable design was used completely the initial weight. The daily gain of weight (GDP) was of 0,811 and 0.780 for T1 and T2, respectively, without significant differences in between the treatments. One was significant differences in the consumption of dry matter (MS) of supplement that was 1.6 versus 2.2 kg/animal/d for T1 and T2 and of I graze respectively that was of 6.1 versus 5.7 kg of MS/animal/d. One was not differences in the total consumption of MS. One concludes that chicken litter fermented stimulated the consumption of I graze and diminished the consumption of supplement, without increasing the gain of weight.