Abstract
Dietary addition of crude form or ethanol extract of brown propolis as nutritional additive on behaviour, productive performance and carcass traits of lambs in feedlot
Highlights
Ionophores – antibiotics used in animal feeding – inhibit gram-positive bacterial growth, provide changes in produced ratio of volatile fatty acids, i.e. increase propionate and decrease methane levels, and enhance energy efficiency of ruminal fermentation (Soltan et al, 2018)
Nutrient intake (DMI and NDF intake (NDFI), g/day) of animals fed diet supplemented with crude propolis was higher (P < 0.05) in comparison to animals receiving diet with sodic monensin
Our results indicate that good quality carcasses were produced in this assay
Summary
Ionophores – antibiotics used in animal feeding – inhibit gram-positive bacterial growth, provide changes in produced ratio of volatile fatty acids, i.e. increase propionate and decrease methane levels, and enhance energy efficiency of ruminal fermentation (Soltan et al, 2018). In 2006 the European Union banned the use of such substances in animal feed (Torres et al, 2010), and so the search for alternative natural compounds is necessary. Propolis has bacteriostatic activity against grampositive and some gram-negative bacteria (Mirzoeva et al, 1997). It can be an alternative to ionophores used in ruminants (Ítavo et al, 2011a; 2011b) due to the presence of compounds like flavonoids, phenolic acids, esters, phenolic aldehydes and ketones (Funari and Ferro, 2006).
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