Autores/as
Resumen
El objetivo de esta revisión es describir el efecto de estrategias nutricionales y de manejo sobre la condición corporal y el desempeño reproductivo de vacas de carne. Las vacas de carne experimentan un balance energético negativo durante el postparto, perdiendo condición corporal. El desarrollo folicular, la tasa de preñez, la fertilidad, los intervalos parto-primer estro, parto-concepción e intervalo entre partos son superiores en vacas con condición corporal moderada durante el postparto, comparadas con vacas delgadas. La suplementación con lípidos de cadena larga poliinsaturados permite obtener una reanudación de la ciclicidad ovárica temprana, independiente de su contribución energética. La suplementación con proteína ayuda a mantener o mejorar la condición corporal durante el postparto, optimiza el medio ambiente ruminal y la eficiencia digestiva de los animales. El destete precoz y el amamantamiento restringido se han venido utilizando en sistemas de cría extensivos, ya que la aplicación de este tipo de estrategias es relativamente fácil. Estas actividades tienen efecto sobre el eje hipotálamo-hipófisis-ovario y reducen los requerimientos energéticos de la madre derivados de la producción de leche, permitiendo mejorar la condición corporal y la reiniciación de la actividad ovárica, además de optimizar los resultados de tratamientos con progestágenos cuando son usados alternamente. En conclusión, una adecuada condición corporal postparto es esencial para garantizar el rendimiento reproductivo de vacas de carne. El uso de suplementación con lípidos y proteína durante el postparto mejora la condición corporal y optimiza el rendimiento reproductivo de vacas de carne. Estrategias de manejo como el destete precoz son efectivas, pero su uso se restringe solo cuando las fuentes nutricionales son escasas o la aplicación de estrategias nutricionales no es posible.
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