Archivos de Zootecnia
versión impresa ISSN 0004-0592
NOUEL BORGES, G. et al. Effects of poultry litter, cereal byproducts and sugar cane bagasse on lamb ruminal physiology. Arch. zootec. [online]. 2011, vol.60, n.229, pp.19-30. ISSN 0004-0592. http://dx.doi.org/10.4321/S0004-05922011000100003.
The 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.
Palabras clave : Intake; Digestibility; Degradability; Rice polishing; Homini.