429 Impact of Feeding a Corn Hybrid Containing Alpha Amylase in Finishing Cattle Diets on Performance and Carcass Characteristics.

Jolly-Breithaupt, Melissa L.; Bittner, Curtis J.; Hilscher, F. Henry; Erickson, Galen E.; MacDonald, James C.; Luebbe, Matt K.

doi:10.1093/jas/sky073.426

Cited by 1 publication

(5 citation statements)

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“…1. In agreement with this study, Jolly-Breithaupt (2018) observed tendencies for increases in total tract digestibility of DM and OM with the feeding of EFC, and they also observed significantly greater (4.2%) total tract starch digestibility with EFC; in our study, the greater starch digestion for EFC than for CON was not statistically significant but was of the same magnitude observed by Jolly-Breithaupt (2018) and large enough (4.2%) to be biologically important. Rojo et al (2005) supplemented alpha-amylase from Bacillus licheniformis to lambs, observing an increase in total tract DM, OM, and starch digestion.…”

Section: Resultssupporting

confidence: 92%

“…Cattle fed DR corn as EFC had 2.7% better G:F than those fed DR corn as CON. This is in general agreement with Jolly-Breithaupt (2018) where EFC yielded 2.2% greater G:F than CON when fed as DR corn. For our diets containing WS corn, the cattle receiving EFC had G:F 9.1% better than those fed CON.…”

Section: Resultssupporting

confidence: 89%

“…These data agree with results published by Jolly-Breithaupt et al (2019) , which showed increases of 5.5% and 5.7% in G:F when feeding EFC containing an alpha-amylase enzyme as dry-rolled corn. However, another experiment by Jolly-Breithaupt (2018) revealed no differences in performance when cattle were fed dry-rolled EFC, which they suggested could be a result of specific growing conditions of the corn hybrid. Other researchers found no differences in DMI, ADG, or G:F when feeding a ground corn hybrid (CA3272) containing an alpha-amylase enzyme when included at 0%, 10%, or 20% of the diet DM ( Schoonmaker et al, 2014 ).…”

Section: Resultsmentioning

confidence: 94%

“…It is possible that the greater starch content of the EFC-S relative to CON-S may have been more important in creating this response than the presence of alpha-amylase, but it is impossible to directly separate these factors. Jolly-Breithaupt (2018) compared feeding dry-rolled corn from either EFC-G or as CON-G with either wet corn gluten feed or modified distillers grains in diets containing 15% control corn silage; feeding EFC-G led to greater digestion of DM, OM, and starch than did the feeding of CON-G, and this response was consistent for diets containing wet corn gluten feed or modified distillers grains. Lara et al (2018a) observed an increase in apparent OM and DM digestibility by wethers when corn silage was supplemented with an alpha-amylase enzyme in the diet.…”

Section: Resultsmentioning

confidence: 98%

“…Previous research involving supplementing exogenous alpha-amylase in cattle diets has been extremely variable. Researchers have either discovered an increase in acetate ( Tricarico et al, 2005 ; Rojo et al, 2005 ), an increase in propionate ( Nozière et al, 2014 ), or found no effects on ruminal VFA concentrations in ruminant animals supplemented with alpha-amylase ( Jolly-Breithaupt, 2018 ; Hristov et al, 2008 ). Molar percentages of acetate, propionate, butyrate, and isovalerate were not affected by treatment ( P > 0.24).…”

Section: Resultsmentioning

confidence: 99%

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Effects of feeding corn containing an alpha-amylase gene on the performance and digestibility of growing cattle

Glaser

Montgomery²,

Vahl

et al. 2022

Translational Animal Science

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Two growth performance studies and two digestibility trials were conducted to evaluate the effects of feeding Enogen® Feed Corn silage and corn grain to growing cattle. In Exp. 1, there were a total of 4 diets offered for ad libitum intake. The 4 diets consisted of 2 varieties of corn (Enogen Feed Corn [EFC] vs. yellow #2 corn [CON]) with two different methods of corn processing (dry-rolled [DR] vs. whole-shelled [WS]) and were formulated to provide 1.13 Mcal NEg/kg dry matter (DM); corn grain was 28.6% of diet DM. Average daily gain (ADG) and ending body weight tended to be greater for calves fed EFC than for those fed CON (P < 0.10). Gain:feed (G:F) was better for calves fed EFC (P < 0.01), improving by 5.5% over calves fed CON. In Exp. 2, a digestibility trial was conducted using 7 cannulated Holstein steers fed the same diets from Exp. 1. Ruminal pH was not affected by corn variety (P > 0.82). Liquid passage rate was greater for CON-fed calves and associated with lower digestibility. Total tract DM and organic matter (OM) digestibilities were greater for EFC-fed calves (P < 0.04). In Exp. 3, there were 4 diets offered for ad libitum intake. Dietary factors were arranged as a 2 × 2 factorial and consisted of two hybrids of corn silage (EFC silage [EFC-S] vs. control silage [CON-S]) and two varieties of corn grain (EFC grain [EFC-G] vs. control [CON-G]; both were dry-rolled). Diets were formulated to provide 1.11 Mcal NEg/kg DM; corn grain was 38.5% of diet DM, and corn silage was 40% of diet DM. ADG was 6.0% greater (P < 0.01) and G:F was numerically (P < 0.14) 3.3% greater for calves fed EFC-S than for those fed CON-S, but substituting EFC-G for CON-G did not affect ADG or G:F. In Exp. 4, a digestibility trial was conducted using 8 cannulated beef steers fed the same diets as Exp. 3. Liquid passage rate (P > 0.20), ruminal pH (P > 0.23), and ruminal total volatile fatty acid concentrations (P > 0.27) were unaffected by treatment. Total tract digestibilities of DM and OM were numerically greater by 2.5 and 2.2%, respectively, for calves fed the EFC-S compared to those fed CON-S. Feeding a corn hybrid containing alpha-amylase enzyme improved G:F of growing calves. Feeding EFC can benefit the beef industry by allowing less processing of grain without sacrificing performance.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 89%