We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
SUPLEMENTACIÓN CON FUENTES DE PROTEÍNA DEGRADABLE Y NO DEGRADABLE EN EL RUMEN EN VACAS ALIMENTADAS CON Urochloa humidicola I. CAMBIOS DE PESO VIVO, CONDICIÓN CORPORAL, PREÑEZ Y QUÍMICA SANGUÍNEA EN VACAS BRAHMAN DE PRIMER PARTO A PASTOREO
- 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 body weight (BW) changes, body score condition (BSC), pregnancy and blood chemistry, 117 Brahman pregnant heifers with BW of 393.5 ± 3.05 kg being 3 (n=84) and 4 (n=33) years old, were divided in three uniforms BW groups and assigned to three supplements (1 kg·animal·d-1) containing mainly corn meal (CM), hydrolyzed feather meal (HFM) and soybean meal (SBM). The supplements contained 20.7, 42.7 and 42.5% crude protein, and 2.8, 2.7 and 2.8 Mcal of ME·kg-1 DM, for CM, HFM and SBM, respectively. Supplementation started approximately 45 days prior calving and was maintained up to the end of the breeding season (BS). Cow's BW changes, wither height, BSC, pregnancy, as well as calf birth weight were recorded, and in serum cow: glucose, βhydroxy butyrate, nonesterified fatty acids and urea were measured. Data were analyzed by ANOVA in a completely randomized design with a 2x3 factorial arrangement (two ages; three supplements). Pregnancy was analyzed by exact logistic regression. At the beginning of the BS, SBM showed higher BW (356.4 kg, P<0.05) compared to HFM (339.0 kg), and CM (340.4 kg). Body score condition at the beginning of BS was higher (P<0.05) in SBM (2.75) in relation to HPH (2.62), and CM (2.63). There was not effect of supplementation on blood chemistry. Pregnancy rate (P>0.05) was: 52.9, 64.7 and 62.2% for CM, HFM and SBM, respectively. Supplementation with one kg of SBM, improved BW at the BS and generated the lower loss of BSC in first calf heifers; however, the magnitudes of these changes were not sufficient to improve reproductive performance.
- Publication
Revista Cientifica de la Facultade de Veterinaria, 2014, Vol 24, Issue 6, p563
- ISSN
0798-2259
- Publication type
Article