Effects of a direct-fed microbial on finishing beef cattle performance, carcass characteristics, and in vitro fermentation

C. H. Ponce, N. DiLorenzo, M. J. Quinn, D. R. Smith, M. L. May, M. L. Galyean

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Two experiments were conducted to evaluate the effects of BeefPro (C and E Agri Products, Baldwin, ND), a microencapsulated direct-fed microbial containing lactate-producing bacteria and digestive enzymes, on performance and carcass characteristics of feedlot cattle and on in vitro fermentation of highconcentrate substrates. In the performance study, 96 steers (average BW = 321 kg) were allotted randomly to 2 treatments: (1) control or (2) 200 mg/d per steer of BeefPro. Final BW did not differ between treatments (P = 0.19); however, steers fed BeefPro tended (P = 0.10) to have a greater carcass-adjusted final BW. Steers fed BeefPro tended (P < 0.07) to have a greater live-weightbasis ADG for the overall feeding period, and carcass-adjusted ADG was greater (P = 0.037) for cattle fed BeefPro. Dry matter intake was greater by steers fed BeefPro (P = 0.04), but G:F (P > 0.55) did not differ between treatments on a live-weight or carcass-adjusted basis. In the in vitro study, the same treatments as in the performance study were used in high-concentrate substrates to determine IVDMD and gas production kinetics. Neither gas production kinetics nor IVDMD was altered by BeefPro at 21.2 mg/kg of DM compared with control (P = 0.10). Although in vitro data did not provide evidence of alterations in ruminal fermentation by including BeefPro in substrates, feedlot performance data suggest that BeefPro, when fed daily at a dose of 200 mg per steer, can have positive effects on DMI and ADG of finishing beef cattle.

Original languageEnglish
Pages (from-to)276-281
Number of pages6
JournalProfessional Animal Scientist
Issue number3
StatePublished - Jun 1 2011


  • Beef cattle
  • Digestive enzyme
  • Direct-fed microbial
  • Feedlot performance


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