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- Title
SUPLEMENTACIÓN CON FUENTES DE PROTEÍNA DEGRADABLE Y NO DEGRADABLE EN EL RUMEN EN VACAS ALIMENTADAS CON Urochloa humidicola. II. FERMENTACIÓN RUMINAL, DEGRADACIÓN DE MATERIA ORGÁNICA Y QUÍMICA SANGUÍNEA EN VACAS MESTIZAS.
- Authors
Mora-Luna, Robert Emilio; Chicco, Claudio Franco; Herrera-Angulo, Ana María; Godoy, Susmira; Garmendia, Julio
- Abstract
In order to evaluate the effect of supplementation with degradable and undegradable protein sources in rumen on ruminal fermentation, degradation of organic matter (OM), and blood chemistry, two crossbred cows per treatment, weighing 446.2 ± 29.3 kg, with rumen fistulae were assigned to any of four treatments: a control fed forage only (F) and three treament groups fed any supplements (1 kg.Animal.d-1) that contained primarily corn meal (CM), hydrolyzed feather meal (HFM) and soybean meal (SBM). The supplements contained 20.7, 42.7, and 42.5% CP, and 2.8, 2.7, and 2.8 Mcal ME.kg-1 DM, respectively for CM, HFM and SBM. Animals were fed, Urochloa humidicola hay and, by suspension in situ nylon bags, degradation (72 h) of OM of forage and supplements, and degradation of protein supplements were determined. In addition, ruminal fluid and blood se rum were chemically evaluated. Data were analyzed by ANOVAR in a completely randomized design. The pH of the rumen fluid at 3 h (P<0.05) post supplement consumption was lower in HFM compared to F (6.56 vs. 7.09). Ammonia nitrogen (NH3-N) was higher (P<0.05) in SBM (3 y 6 h), and acetic and propionic acids at 0 h were higher (P<0.05) in SBM and HFM. Degradation of forage OM was higher (P<0.05) in HFM (44.8%) and SBM (42.0%). The degradation of supplements OM did not differ, whereas degradation of CP was lower (P<0.05) in HFM (64.2%). Serum urea in SBM was higher (P<0.05) in all sampling times (21 to 32.8 mg.dL-1). Supplementation with one kg of SBM increased ruminal ammonia nitrogen, and supplementation either SBM or HFM improved forage OM degradation.
- Publication
Revista Cientifica de la Facultade de Veterinaria, 2015, Vol 25, Issue 1, p63
- ISSN
0798-2259
- Publication type
Article