Efecto de cama de pollos, subproductos de cereales y caña sobre la fisiología ruminal de ovinos.

Abstract

PALABRAS CLAVE ADICIONALES Consumo. Digestibilidad. Degradabilidad. Pulitura de arroz. Harina de subproductos de maíz. ADDITIONAL KEYWORDS Intake. Digestibility. Degradability. Rice polishing. Homini. RESUMENSe determinó el efecto sobre el consumo y digestibilidad aparente de niveles crecientes de cama de pollo (Cp) con harina gruesa de subproductos de maíz (Hm) o pulitura de arroz (Pa) y bagacillo de caña amonificado (40%, Ba), en raciones para corderos en crecimiento en confinamiento total. Se realizó un experimento en un arreglo factorial 2x4 en diseño de cuadrado latino con 8 corderos canulados en el rumen, incorporando Hm o Pa (48, 39, 30 y 21%, en ambos casos) y Cp (11,4; 20,4; 29,4 y 38,4%). Las raciones con Cp y Hm fueron más consumidas que las de Cp y Pa (10 a 12,1% del peso metabólico en materia seca (MS), para Hm vs. 7,6 a 9,3% para Pa) y para la materia orgánica (MO) 8,1 a 8,5% del peso metabólico para Hm y 5,8 a 6,4% para Pa; respecto a la digestibilidad aparente (DA) se obtuvo un 34,2 a 43% de la MS y 67,8 a 67,1% de la MO para raciones con Hm vs. 30,5 a 37,2% de la MS y 65,5 a 66,1% de la MO para raciones con Pa. Se apreció que el pH y el nitrógeno amoniacal, no alcanzaron los valores indicativos de acidosis ni de intoxicación con amoniaco, lo cual se correspondió con valores normales de su fisiología sanguínea para raciones con Cp y Hm. Los resultados indican que Hm y Ba en raciones con Cp permitieron un consumo y digestibilidad de los nutrientes dentro de rangos normales para corderos, sin riesgos para la salud del animal, lo cual no ocurrió con las raciones que contenían Pa y Cp. SUMMARYThe effect on intake and digestibility of increasing levels of poultry litter (Cp), corn byproduct meal (Hm) or rice polishing (Pa) and sugarcane ammoniated bagasse (Ba, 40%) in rations for growing lambs in total confinement was determined. A factorial arrangement 2x4 Latin square design, with 8 sheep cannulated in rumen, was used, incorporating Hm or Pa (48, 39, 30 and 21% in both cases) and Cp (11.4, 20.4, 29.4, and 38.4%). Dry matter intake was higher in rations with Cp and Hm with respect to Cp and Pa (10-12.1% of metabolic weight for Hm vs. 7.6-9.3% for Pa) and for organic matter (MO) intake from 8.1 to 8.5% of metabolic weight for Hm and 5.8% to 6.4% for Pa; the apparent digestibility (DA) of dry matter was 34.2-43% and 67.8-67.1% for MO in rations with Hm vs. 30.5-37.2% and 65.5-66.1% respectively for Pa. The ruminal pH and amoniacal nitrogen levels, were not indicative of acidosis or ammonia poisoning, which was consistent with normal blood physiology for rations with Cp and Hm. Results indicate that Hm and Ba rations with Cp allowed consumption and digestibility of nutrients within the normal range for lambs, without risk to animal health, which did not occur with the ratios containing Pa and Cp. INTRODUCCIÓNLos sistemas de producción con rumian-

Intake and digestibility of rations with distillery yeasts byproducts, molasses and ammoniated sugar cane tops in lambs in total confinement

“…Determining the nutritional quality of these mixtures, taking samples of forages and raw materials that were analyzed to determine dry matter, crude protein, energy and ash by the methods described by the AOAC (16) and fractions of the cell wall, as insoluble fiber in neutral detergent and acid, and hemicellulose by the methodology described by Van (17). As well as the intake and digestibility in sheep described by Nouel-Borges et al (3), with the use of 8 young animals (2 per treatment and per period) crossbreed West African, 19.31 ± 5.96 Kg Initial Live Weight (LW), an average metabolic weight (MW, LW 0.75 ) of 9, 58±0.14 kg during the experiment, in four experimental periods of 14 days each, with 7 days of habituation and 7 days of observation to make the measurements of intake and feces of 24 h, for a total of 56 days (3), controlling the experimental period and the animals ( Table 1), determining the food intake and the apparent digestibility of the nutrients when they receive a base ration of ammoniated sugar cane tops (18). For the analysis of all the variables described, the software Statistix for Windows version 8.0 (19).…”

“…The rearing of post-weaning lambs requires balanced diets capable of maintaining weight gains that facilitated attaining the weight at the time of slaughter or the first service quickly (1,2), at a competitive feeding cost and preferably using readily available resources locally (3,4). For the year 2014 in Venezuela, 102,877 hectares of sugarcane were harvested, obtaining 6,483,755 tons of cane, of which 367,000 tons of molasses were extracted (5).…”