H. C. Block
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View article: Effects of cow feed efficiency, longevity, heterosis, and lifetime productivity on profitability of heifer selection and cow–calf operations
Effects of cow feed efficiency, longevity, heterosis, and lifetime productivity on profitability of heifer selection and cow–calf operations Open
This study investigated factors influencing heifer replacement and cow–calf profitability using 361 cows (born 2011–2018) at the Lacombe Research and Development Centre, Alberta, Canada. Profitability was measured by marginal returns (MR) …
View article: 435 Use of plant bioactives to improve the efficiency of rumen function
435 Use of plant bioactives to improve the efficiency of rumen function Open
Plant bioactives, also known as phytogenics or phytobiotics, are secondary metabolites of plant origin that are deployed as host-defense mechanisms against predators or to enable them to be more competitive in their environment. These meta…
View article: 314 Dehydrated Garlic Powder Did Not Influence Enteric Gas Fluxes in Feedlot Steers
314 Dehydrated Garlic Powder Did Not Influence Enteric Gas Fluxes in Feedlot Steers Open
This 2-yr study was conducted to evaluate the biochemical profiles of commercial dehydrated garlic powder (DGP) and its associated influence on enteric gas fluxes, mineral intake, and body performance at a 5% inclusion level. The DGP was a…
View article: 314 Steer Production Performance and Enteric gas Emissions Associated with Free-Choice Mineral Supplement Infused with Varying Levels of Garlic Powder
314 Steer Production Performance and Enteric gas Emissions Associated with Free-Choice Mineral Supplement Infused with Varying Levels of Garlic Powder Open
The addition of phytogenics such as garlic powder into beef mineral supplements is motivated by the potential for increased mineral intake and associated insectifugal outcomes. This 3-yr study compared feed and mineral intake and performan…
View article: Effects of Silage-Based Diets and Cattle Efficiency Type on Performance, Profitability, and Predicted CH4 Emission of Backgrounding Steers
Effects of Silage-Based Diets and Cattle Efficiency Type on Performance, Profitability, and Predicted CH4 Emission of Backgrounding Steers Open
Feed costs are the largest expense in commercial beef production. Increasing cattle (Bos taurus) feed efficiency should reduce feed costs and increase beef profitability. This study used data from two years of a backgrounding trial conduct…
View article: 151 Intake, Growth, and Insectifugal Outcomes Associated with Free-choice Supplementation of Garlic Products to Feedlot Steers
151 Intake, Growth, and Insectifugal Outcomes Associated with Free-choice Supplementation of Garlic Products to Feedlot Steers Open
Conflicting anecdotal accounts from producers about their cattle performance and fly-repellence outcomes while receiving garlic-infused supplements have limited feeding decisions. This study evaluated differences in animal performance and …
View article: 153 Differences in Health and Carcass Characteristics of Yearling Steers That Received Free-choice Garlic-infused Mineral Supplements
153 Differences in Health and Carcass Characteristics of Yearling Steers That Received Free-choice Garlic-infused Mineral Supplements Open
Garlic products have been reported to have antimicrobial effects and may trigger anemia in horses, but their direct impact on feedlot cattle has not been detailed. With increased free-choice feeding of garlic-infused mineral supplements to…
View article: Effects of barley and triticale silage based diets and residual feed intake on performance, profitability, and predicted CO2e emission of backgrounding steers
Effects of barley and triticale silage based diets and residual feed intake on performance, profitability, and predicted CO2e emission of backgrounding steers Open
Background Feed costs are the largest expense in commercial beef production. Increasing cattle (Bos taurus) feed efficiency should reduce feed costs and increase beef profitability. This study used data from two years of a backgrounding tr…
View article: Genetic potential for residual feed intake and diet fed during early- to mid-gestation influences post-natal DNA methylation of imprinted genes in muscle and liver tissues in beef cattle
Genetic potential for residual feed intake and diet fed during early- to mid-gestation influences post-natal DNA methylation of imprinted genes in muscle and liver tissues in beef cattle Open
Discovery of epigenetic modifications associated with feed efficiency or other economically important traits would increase our understanding of the molecular mechanisms underlying these traits. In combination with known genetic markers, t…
View article: 167 Addition of garlic powder at low doses stimulated mineral consumption in feedlot cattle
167 Addition of garlic powder at low doses stimulated mineral consumption in feedlot cattle Open
The trial evaluated whether the addition of garlic powder increased mineral intake and reduced fly abundance in feedlot cattle. Following a completely randomized design, one hundred and four (104) spring-born crossbred steers (BW 529 ± 8kg…
View article: PSI-15 Feeding garlic powder at low doses does not negatively affect feedlot cattle health
PSI-15 Feeding garlic powder at low doses does not negatively affect feedlot cattle health Open
Antimicrobial and insectifugal effects have been reported for dehydrated garlic powder. With limited knowledge of its impact on the health of beef cattle, this study investigated whether free-choice minerals infused with garlic powder affe…
View article: PSXIV-7 Red blood cells are a better indicator than plasma for predicting subcutaneous trans fatty acid composition in cattle
PSXIV-7 Red blood cells are a better indicator than plasma for predicting subcutaneous trans fatty acid composition in cattle Open
The trans (t)-18:1 in beef has become of interest as partially-hydrogenated-vegetable-oils are removed from the food supply. Predicting t-18:1 in beef early in the feeding period would be useful if limitations are put on t18:1 in beef. The…
View article: 93 Feeding behavior as predictive traits of fertility and lifetime productivity in replacement beef heifers
93 Feeding behavior as predictive traits of fertility and lifetime productivity in replacement beef heifers Open
Fertility and longevity traits in beef cows are difficult and expensive to measure. The use of other traits to predict fertility and longevity traits in beef cows will enable selection for efficient reproduction earlier in an animal’s life…
View article: A240 AN UNUSUAL PRESENTATION OF HEPATIC ENCEPHALOPATHY: RECURRENT GLOBAL APHASIA
A240 AN UNUSUAL PRESENTATION OF HEPATIC ENCEPHALOPATHY: RECURRENT GLOBAL APHASIA Open
BACKGROUND: Hepatic encephalopathy (HE) is impairment in a brain function caused by liver dysfunction and portosystemic shunting. It is a frequent and debilitating complication of cirrhosis, the pathophysiology of which is complex and not …
View article: Feeding steers hay with extruded flaxseed together or sequentially has a profound effect on erythrocyte <i>trans</i> 11-18:1 (vaccenic acid)
Feeding steers hay with extruded flaxseed together or sequentially has a profound effect on erythrocyte <i>trans</i> 11-18:1 (vaccenic acid) Open
Extruded flaxseed and ground hay [25% and 75%; dry matter (DM) basis] were fed in a total mixed ration (TMR) or sequentially (non-TMR) to three pens of eight crossbred steers per diet. At 112 d, erythrocytes from non-TMR steers had 65% mor…
View article: An economic analysis of resting versus nonresting perennial pastures during the critical acclimation period
An economic analysis of resting versus nonresting perennial pastures during the critical acclimation period Open
Economic evaluations were carried out on stochastically simulated production systems using data from a grazing systems’ trial, which evaluated the impact of resting (i.e., grazing cessation) alfalfa (Medicago sativa L.) – bromegrass (Bromu…
View article: Fatty acid composition of beef steers as affected by diet and fat depot
Fatty acid composition of beef steers as affected by diet and fat depot Open
CITATION: Mapiye, C. et al. 2015. Fatty acid composition of beef steers as affected by diet and fat depot. South African Journal of Animal Science, 45(4):386-394, doi:10.4314/sajas.v45i4.5.
View article: The effects of spring versus summer calving on beef cattle economic performance in western Canada
The effects of spring versus summer calving on beef cattle economic performance in western Canada Open
Khakbazan, M., Durunna, O. N., Sirski, T. K., Brewin, D. G., Huang, J., Berry, N., Iwaasa, A. D., Scott, S. L., Robins, C. D., Block, H. C. and Lardner, H. A. 2015. The effects of spring versus summer calving on beef cattle economic perfor…