Efecto de la suplementación nutricional sobre el balance energético en vacas lecheras en trópico bajo
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista, Editorial Lasallista
Abstract
Introduction. The intensive dairy
production demand high food offers to fill the
nutritional requirements of the lactation, these
cannot be provided to the peripartum cow, by the
depression of the consumption and metabolic
and endocrine changes occurring during of
the transition period. The lower consumption
of dry matter and the energy demands for
high milk production, take the animal to the
Negative Energy Balance (NEBAL), which
must be overcome quickly to ensure a better
reproductive rate and a higher milk production.
Objective. To explore different nutritional
options during the transition period, in order
to reduce negative energy balance. Materials
and methods. 28 cows were used, in a semiintensive dairy cows system, located in the
tropics. Four treatments were used: TT1,
control group; TT2, high energy density;
TT3, non-protein nitrogen encapsulated,
and TT4, monensin sodium. We analyzed
hormones and metabolites related to energy,
protein and minerals. By ultrasonography, it
was determined the follicular dynamics and
the presence of corpus luteum; likewise, we
evaluated the reproductive indicators values
and milk production. The sampling period up
to 105 days postpartum allowed for the analysis
of the first phase of lactation and covers the
period in which it is expected that the dairy
cow is in gestation. Results. Some variations
were observed in the periods corresponding
to the transition period for the main indicators
of energy metabolism. Ovarian reactivation
showed that it was not rapid, however, there
was an effect on open days and reproductive
efficiency. Conclusion. The concentrations of
hormones and metabolites analyzed did not
show significant variations. The effect of at least
one treatment against the control was evident;
likewise, there were variations in some analyzed
periods. Reproductive behavior was poor.
Description
Keywords
Corporación Universitaria Lasallista, Nutrición animal, Ganado lechero, Ganado lechero - Alimentación y alimentos, Rumen, Reproducción animal
Citation
Revista Lasallista de Investigación–Vol. 17 No 1–2020