title: Dry matter intake and digestibility of rations replacing concentrates with graded levels of Enterolobium cyclocarpum in Pelibuey lambs.
abstract: The aim of the study was to evaluate the effect of graded levels of Enterolobium cyclocarpum pods in the ration on feed intake and digestibility by Pelibuey lambs. Five dietary treatments were imposed where ground pods replaced concentrate diet at 0, 20, 30, 40 and 50 % of dry matter (DM), respectively. The concentrate portion was composed of ground sorghum, soybean meal, cane molasses and minerals. Five entire Pelibuey lambs with initial bodyweight 34 ± 2 kg were allocated in the treatments in a 5 × 5 Latin square design. Values of dry matter intake (DMI) and dry matter (DMD) and organic matter (OMD) digestibility were measured and metabolisable energy intake (MEI) estimated. Rumen degradation constants for E. cyclocarpum were also measured. There were no differences (P > 0.05) in average DMI (86.6 g/kg(0.75)) and OMI (81.2 g/kg(0.75)) among treatments. As the level of incorporation of E. cyclocarpum pods increased, voluntary DMI and OMI increased, whereas apparent DMD and OMD decreased linearly. Average digestible DM (65 g/kg(0.75)) and OM (61 g/kg(0.75)) intakes were similar (P > 0.05) among treatments. Similarly, MEI (0.976 MJ ME kg(0.75)/day) was not different (P > 0.05) among treatments. The potential rumen degradation (A + B) of ground pods of E. cyclocarpum was 866.4 g/kg DM. Ground pods of E. cyclocarpum can be employed for lamb feeding up to 50 % of the ration, without affecting DMI, DM apparent digestibility and MEI.
authors.affiliation: Departamento de Nutrición Animal. Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil km 15.5, C.P. 97300, Mérida, Yucatán, México. capricornio_1352@hotmail.com
authors.forename: Angel Trinidad
authors.initials: AT
authors.lastname: Piñeiro-Vázquez
authors.forename: Armín Javier
authors.initials: AJ
authors.lastname: Ayala-Burgos
authors.forename: Alfonso Juventino
authors.initials: AJ
authors.lastname: Chay-Canul
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Ku-Vera
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000822:Animal Husbandry / Q000379:methods*; D000818:Animals; D004032:Diet; D004063:Digestion / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D007887:Fabaceae / Q000737:chemistry*; D005243:Feces / Q000737:chemistry; D005247:Feeding Behavior / Q000187:drug effects*; D008297:Male; D008800:Mexico; D012417:Rumen / Q000378:metabolism; D012639:Seeds / Q000737:chemistry; D034561:Sheep, Domestic / Q000254:growth & development / Q000502:physiology*; D014329:Tropical Climate