Evaluar el efecto de tres pre-iniciadores sobre el crecimiento y desarrollo ruminal de terneras.
Fecha
2019-12
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Universidad EARTH
Resumen
La presente investigación tuvo como objetivo evaluar el efecto de tres-preiniciadores comerciales sobre el consumo, el crecimiento y el desarrollo ruminal en terneras de lechería en el periodo de pre-destete. Se utilizaron 21 terneros con peso promedio de 33 kg, siendo asignados aleatoriamente a uno de los 3 tratamientos (pre-iniciadores): Crapid Gold (T1), Kalb Mare (T2) y Master Mash (T3), con porcentajes de PC de 21,56 %, 20,31 %, 19,09 % respectivamente. Mediciones de consumo de alimento, peso vivo, altura a la cruz, altura a la cadera y circunferencia torácica fueron tomadas semanalmente. A las ocho semanas de vida dos terneros por tratamiento fueron sacrificados, los estómagos fueron recolectados para el análisis de grosor de pared ruminal, altura y ancho de papilas. No se encontró diferencias significativas entre tratamiento en consumo, crecimiento ni desarrollo ruminal. Sin embargo, T1 obtuvo valores más altos en desarrollo ruminal: 1612 g, 3,74 mm, 1,45 mm, 2,73 mm en peso de retículo-rúmen, altura de papilas, ancho papilas y grosor de pared ruminal, respectivamente. También la ganancia diaria de peso más alta (0,688 kg/día) fue obtenida en este tratamiento siendo el pre-iniciador con %PC más alto.
The objective of this research project was to evaluate the effect of three commercial starters on feed intake, growth and ruminal development in dairy calves during the pre-weaning period. 21 calves with an average weight of 33 kg were used and randomly assigned to one of the 3 treatments (starters): Crapid Gold (T1), Kalb Mare (T2) and Master Mash (T3), with CP percentages of 21,56%, 20,31 %, 19,09 % respectively. Measurements of feed intake, body weight, withers height, hip height and thoracic circumference were taken weekly. At eight weeks of age the calves were slaughtered, the stomachs were collected for ruminal wall thickness analysis, height and width of papillae. No differences were found between treatments in feed intake, growth nor ruminal development. However, T1 obtained higher values in ruminal development: 1612 g, 3,74 mm, 1,45 mm, 2,73 mm in weight of reticulum-rumen, height of papillae, width of papillae and thickness of ruminal wall respectively. Also, the highest ADG (0.688 kg / day) was obtained in this treatment being the pre-initiator with the lowest CP%
The objective of this research project was to evaluate the effect of three commercial starters on feed intake, growth and ruminal development in dairy calves during the pre-weaning period. 21 calves with an average weight of 33 kg were used and randomly assigned to one of the 3 treatments (starters): Crapid Gold (T1), Kalb Mare (T2) and Master Mash (T3), with CP percentages of 21,56%, 20,31 %, 19,09 % respectively. Measurements of feed intake, body weight, withers height, hip height and thoracic circumference were taken weekly. At eight weeks of age the calves were slaughtered, the stomachs were collected for ruminal wall thickness analysis, height and width of papillae. No differences were found between treatments in feed intake, growth nor ruminal development. However, T1 obtained higher values in ruminal development: 1612 g, 3,74 mm, 1,45 mm, 2,73 mm in weight of reticulum-rumen, height of papillae, width of papillae and thickness of ruminal wall respectively. Also, the highest ADG (0.688 kg / day) was obtained in this treatment being the pre-initiator with the lowest CP%
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GANADO DE LECHE, TERNEROS, ALIMENTACION DE GANADO VACUNO, CRIANZA, PRODUCCION ANIMAL, RUMEN