Resumen

COSTA, L.B. et al. Phytobiotic additives and sodium butyrate as growth promoters of weanling pigs. Arch. zootec. [online]. 2011, vol.60, n.231, pp.687-698. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000300056.

The purpose of this work was to evaluate phytobiotic additives and sodium butirate as alternatives to antimicrobial growth promoters based on performance, digestibility, digesta pH and diarrhea incidence of weanling pigs. A 34-d randomized complete block design experiment, two replicates in the time, was carried out to compare five treatments: control (T1) basal diet; antimicrobial (T2) basal diet with 40 ppm of colistin sulfate; phytobiotic (T3) basal diet with 500 ppm of microencapsulated natural phytobiotics; sodium butyrate (T4) basal diet with 1500 ppm of sodium butyrate; and phytobiotic + sodium butyrate (T5) basal diet with 500 ppm of natural ptytobiotics + 1500 ppm of sodium butyrate. One hundred and twenty piglets, eight replications per treatment, and three animals per experimental unit were used for performance data and diarrhea incidence. For digestibility assay, 60 piglets of first four replications were considered, using chromium oxide as fed marker. At the end of experimental period, an animal per pen of first four replications was slaughtered for digesta pH measurements. Specific contrasts of practical importance were tested. No differences were found in performance data (p>0.05), however numerically sodium butyrate (T4) showed the best results in both periods. The treatments did not show any effect (p>0.05) on diarrhea incidence and on digesta pH. Energy digestibility coefficient average of phytobiotic additives (T3) and sodium butyrate (T4) was higher (p= 0.07) than that of phytobiotic + sodium butyrate (T5). Therefore, in the experimental nursery condition, there was no evidence of natural phytobiotic and sodium butyrate as growth promoters of weanling pigs fed complex diet with high digestibility raised.

Palabras clave : Antimicrobials; Digestibility; Diarrhea; Digesta pH; Swine.

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