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document
Effects of diet and Aspergillus oryzae extract or Saccharomyces cervisiae on growth and carcass characteristics of lambs and steers fed to meet requirements of natural markets . Two studies were conducted to determine the effects of diet and feed additive on growth and carcass characteristics of lambs and cattle destined for all natural markets . In Exp . 1 , 48 Dorset × Hampshire lambs ( initial BW 29.4 ± 0.1 kg ) were used in a randomized complete block experiment to determine the effects of Aspergillus oryzae extract , Amaferm ( AMF ) supplementation ( 1 g/d ) in an 85 % concentrate diet on growth and carcass characteristics . Lambs were allotted to 12 pens ( 4 lambs per pen ) , and blocked by sex and BW . Lambs were fed until the average BW of each pen reached a target BW ( 55.4 kg for wethers and 50.0 kg for ewes ) , at which time the entire pen of lambs was slaughtered . Amaferm resulted in a greater ( P=0.07 ) G : F. In Exp . 2 , 168 crossbred steers ( initial BW 300 ± 0.7 kg ) were used in a trial with a 3 × 2 factorial arrangement of treatments to examine the effects of 0.5 g/d of Saccaromyces cervisiae boulardii CNCM 1079-Levucell SB ( LEV ) , or 3 g/d of AMF with 2 corn sources , dry whole-shelled corn or high moisture corn , on growth and carcass characteristics . Neither LEV nor AMF improved ( P > 0.10 ) carcass characteristics compared with control or non-feed-supplemented steers . Addition of LEV to high-concentrate , corn-based diets did not improve ( P > 0.10 ) growth performance of feedlot steers . However , addition of AMF to a diet composed of dry whole-shelled corn resulted in an improvement ( P < 0.05 ) in G : F ( 0.208 vs. 0.194 ) . Results indicate that at the amounts fed , AMF may improve G : F for lambs and steers fed dry corn-based finishing diets .
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Intervention_Other
diet
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Intervention_Other
Aspergillus oryzae extract
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Intervention_Other
Saccharomyces cervisiae
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Intervention_Physical
diet
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Intervention_Other
and feed additive
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Outcome_Physical
carcass characteristics
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Outcome_Physical
growth performance
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Participant_Condition
lambs
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Participant_Condition
steers fed to meet requirements of natural markets
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Participant_Condition
lambs
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Participant_Condition
cattle destined for all natural markets