Performance of three racial groups of grazing steers supplemented with agroindustrial by-products
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| Autores: | , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2020 |
| Descripción: | Performance of three racial groups of grazing steers supplemented with agroindustrial by-products. The main objective of this research was to evaluate the productive performance of three racial groups of steers, receiving or not supplementation with agro-industry by-products under grazing conditions in the humid Colombian Caribbean. Forty-eight steers: Angus x Brahman (AxB), Simmental x Brahman (SxB) and Romosinuano x Brahman (RxB) with average weight of 274± 13,76 kg and 17 months old were randomly distributed to two types of feed management; with feed supplementation (CSA: 24 animals) and without feed supplementation (SSA: 24 animals) in each breed group, using a complete randomized design (DCA). The supplementation consisted of a mix of rice bran (56.5%), cottonseed (43.5%) and mineralized salt (100 g/steer/day). The highest daily weight gain (GDP) was observed in the animals of the treatments AxB CSA, SxB CSA and RxB CSA (p= 0.001) with 730, 942 and 650 g/day respectively. The GDP of the animals AxB SSA, SxB SSA and RxB SSA, corresponded to 560, 520, and 608 g/animal/day. Regarding body composition by ultrasound measurements, the greater attributes of the ribeye area (p=0.0175) were observed for the AxB CSA (43.73 2.54 cm2) y RxB CSA treatments (45,51±2,34 cm2) and for the rump fat thickness (p=0.0229), the RxB CSA treatment (3.97 0.25 mm). The highest projected meat production kg/ha in a year, corresponded to the average for the biotypes of CSA treatment with 1,131.33 kilograms/ha/year, surpassing by 27.5% the production of SSA biotypes treatment of 821.26 kilograms. From the results obtained in this research, the supplementation of grazing steers with by-products of agro-industry becomes a productive activity to increasing GDP and meat production kg/ha, reflecting the potential of this practice as a valid strategy for the development of more efficient and competitive meat production systems for the humid Colombian Caribbean region. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/43767 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/43767 |
| Palabra clave: | alimentación de rumiantes Cynodon nlemfuensis ganado de carne ganancia de peso pastoreo rotacional ultrasonido ruminant feeding beef cattle weight gain rotational grazing ultrasound |