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Full-Text Articles in Animal Sciences
Consumer Acceptance And Value Of Wet Aged And Dry Aged Beef Steaks, Bethany M. Sitz, Chris R. Calkins, Wendy J. Umberger, Dillon M. Feuz
Consumer Acceptance And Value Of Wet Aged And Dry Aged Beef Steaks, Bethany M. Sitz, Chris R. Calkins, Wendy J. Umberger, Dillon M. Feuz
Nebraska Beef Cattle Reports
Beef aged in air (dry aging) develops a different flavor profile than beef aged in vacuum bags (wet aging). This research compared wet versus dry aged beef. At similar tenderness and marbling, no differences in desirability or value were found for wet versus dry aged Choice beef. For Prime, wet aged steaks were rated more desirable in flavor, juiciness, and overall acceptability and valued more than dry aged Prime. A significant proportion (27- 30%) of consumers preferred dry aged beef and were willing to pay > $1.90/ lb more for it. Consumers can detect sensory differences in beef and are willing …
An Evaluation Of Economic Efficiencies Of Two Beef Systems From Calving To Harvest, Rosemary V. Anderson, Richard J. Rasby, Dick Clark, Terry J. Klopfenstein, Casey Macken
An Evaluation Of Economic Efficiencies Of Two Beef Systems From Calving To Harvest, Rosemary V. Anderson, Richard J. Rasby, Dick Clark, Terry J. Klopfenstein, Casey Macken
Nebraska Beef Cattle Reports
Spring-calving, crossbred cows were used in a three-year experiment to determine the economic efficiencies of two different beef systems. Cows were either wintered on pasture (Control System) or on cornstalks (Treatment System). Control System steers were transported to a feedlot, fed a finishing diet and slaughtered. Treatment System steers were wintered on cornstalks, grazed pasture, fed a finishing diet and slaughtered. The Treatment System had lower weaning and slaughter breakeven, lower cost per weaned calf and greater profit potential when finished steers were sold on a live basis. Profitability was similar when finished steers were sold on a grid basis.
Carcass Traits And Palatability Attributes Of Herdmates Finished As Calves Or Yearling Steers, Perry S. Brewer, Chris R. Calkins, Richard J. Rasby, Terry J. Klopfenstein, Rosemary V. Anderson
Carcass Traits And Palatability Attributes Of Herdmates Finished As Calves Or Yearling Steers, Perry S. Brewer, Chris R. Calkins, Richard J. Rasby, Terry J. Klopfenstein, Rosemary V. Anderson
Nebraska Beef Cattle Reports
A two-year study compared steers from the same herd finished as calves or yearlings at a fat thickness endpoint of 0.5 in. Yearlings yielded heavier carcasses with larger ribeye areas, lower marbling scores and lower quality grades. Calves produced more tender steaks measured by shear force and a consumer taste panel. The probability of a tough steak (based on shear force) from calf-fed steers was 1.9 and 0.02% for 7 and 21 days of aging, respectively, while the risk for yearlings was 29.2 and 4.0%, respectively. Calf-fed steers produced more tender steaks and, after 21 days of aging, steaks from …
Basis Variability On The Feeder Cattle Contract Versus The Failed Stocker Contract, Dillon Feuz, Sebastian Perversi, Wendy Umberger
Basis Variability On The Feeder Cattle Contract Versus The Failed Stocker Contract, Dillon Feuz, Sebastian Perversi, Wendy Umberger
Nebraska Beef Cattle Reports
Basis variability was compared in 10 markets for 550 and 750 pound steers using the Chicago Mercantile Exchange (CME) stocker and feeder indexes as a proxy for futures prices. Basis variability for 550 pound steers was significantly greater than basis variability for 750 pound steers. As market volume decreased and as volume variability increased, basis variability also increased. The failed CME stocker contract never attracted enough volume to remain a viable contract. One possible explanation for this contract failure is the basis risk associated with it was large enough to discourage producers from using the contract to hedge calves.
Effect Of Conjugated Linoleic Acid On Cell Death In Adipose Tissue, Kim M. Hargrave, Brett J. Meyer, Jess L. Miner
Effect Of Conjugated Linoleic Acid On Cell Death In Adipose Tissue, Kim M. Hargrave, Brett J. Meyer, Jess L. Miner
Nebraska Beef Cattle Reports
Mice fed conjugated linoleic acid (CLA) lose body fat. This loss of body fat is accompanied by an increases in DNA fragmentation, indicative of apoptosis or programmed cell death. Adipose apoptosis was observed in mice fed the trans-10, cis-12 isomer or a mixture of isomers but not the cis-9,trans-11 isomer. The trans-10,cis-12 isomer also induced DNA fragmentation in preadipocytes in vitro, but not mature adipocytes. The cis-9,trans-11 CLA isomer, the predominant isomer in ruminant-derived products, was reported to induce apoptosis of cancer cells. Determining the mechanism of action of CLA will improve our understanding of body fat regulation.
Influence Of Implant Regimen On Performance And Carcass Characteristics In Feedlot Steers, Heather L. Haugen, Galen E. Erickson, Court G. Campbell, Casey G. Macken
Influence Of Implant Regimen On Performance And Carcass Characteristics In Feedlot Steers, Heather L. Haugen, Galen E. Erickson, Court G. Campbell, Casey G. Macken
Nebraska Beef Cattle Reports
A feedlot experiment was conducted to evaluate initial and terminal implant combinations in finishing steers. Implant strategies including Synovex Choice increased average daily gain and rib eye area when compared to strategies including Revalor-IS. Steers implanted initially and terminally with Synovex Choice also had increased performance compared to steers implanted initially and terminally with Revalor-IS; however, performance was not different when comparing Synovex Choice verses Revelor-IS as an initial implant (Revalor-S terminal implant). Marbling was similar across implant strategies, indicating the observed increase in performance with Synovex Choice was achieved without negatively influencing carcass quality.
The Influence Of Corn Kernel Traits On Feedlot Cattle Performance, Stephanie L. Jaeger, Casey N. Macken, Galen E. Erickson, Terry J. Klopfenstein, Wayne A. Fithian, David S. Jackson
The Influence Of Corn Kernel Traits On Feedlot Cattle Performance, Stephanie L. Jaeger, Casey N. Macken, Galen E. Erickson, Terry J. Klopfenstein, Wayne A. Fithian, David S. Jackson
Nebraska Beef Cattle Reports
Seven commercially available corn hybrids representing a range within and among kernel traits were used in a finishing trial to evaluate effects of corn kernel traits on feedlot animal performance. Average daily gain, DMI, and hot carcass weight were similar among all corn hybrids. A significant difference in feed conversion of 8.4% from lowest to highest among hybrids was observed. Kernel traits correlated with feed conversion were 1,000 grain weight, stenvert time to grind, and stenvert proportion of soft to coarse particles. Efficiency of finishing cattle gain can be significantly improved by selection of corn hybrids with more desirable kernel …
Effect Of Distillers Grains Or Corn Supplementation Frequency On Forage Intake And Digestibility, Tim W. Loy, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson
Effect Of Distillers Grains Or Corn Supplementation Frequency On Forage Intake And Digestibility, Tim W. Loy, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson
Nebraska Beef Cattle Reports
Ten ruminally cannulated heifers received no supplement, dry distillers grains (DDG) daily, DDG on alternating days, dry rolled corn daily, or corn on alternating days. Hay intake was higher for non-supplemented than for supplemented heifers. No intake differences were observed between DDG and corn-supplemented heifers. Heifers supplemented daily had higher and more consistent intakes than those in alternate-day treatments, particularly within corn-supplemented heifers. Ruminal pH and hay fiber disappearance were greater in non-supplemented heifers. Corn-supplemented heifers had slower rates of fiber disappearance than DDG-supplemented. Alternate-day energy supplementation increased intake variability compared to daily supplementation.
Dried Distillers Grains As A Grazed Forage Supplement, James C. Macdonald, Terry J. Klopfenstein
Dried Distillers Grains As A Grazed Forage Supplement, James C. Macdonald, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Thirty heifers grazing smooth bromegrass were individually supplemented with 0, 1.0, 2.1, 3.1, or 4.2 lb per head per day (DM) dried distillers grains (DDG) for 84 days to determine effects of DDG supplementation on ADG and forage intake and to determine the value of DDG in grazing enterprises. Forage intake was estimated using the 1996 NRC model. Supplementation of DDG resulted in a linear increase in ADG and decreased estimated forage intake. DDG may be an attractive forage supplement due to increased revenue from additional ADG and savings from decreased forage intake.
Prediction Of Net Energy Adjuster For Feedlot Cattle When Using The 1996 Beef Cattle Nrc Model, Casey N. Macken, Rob J. Cooper, Terry J. Klopfenstein, Galen E. Erickson
Prediction Of Net Energy Adjuster For Feedlot Cattle When Using The 1996 Beef Cattle Nrc Model, Casey N. Macken, Rob J. Cooper, Terry J. Klopfenstein, Galen E. Erickson
Nebraska Beef Cattle Reports
Data from 277 treatment means in 15 previous beef cattle studies were used to develop equations to predict net energy adjusters throughout the feeding period to better predict gain with the National Research Council’s 1996 Nutrient Requirements of Beef Cattle model. Early in the feeding period the net energy adjuster reduces the energy to correct for overprediction of gain and late in the feeding period the net energy adjuster increases energy to correct for under prediction of gain. The average NE adjusters were 0.88 and 1.08 for the beginning and end of the feeding period.
Feed Values For Annual Forages In Western Nebraska, Burton A. Weichenthal, David D. Baltensperger, Kenneth P. Vogel
Feed Values For Annual Forages In Western Nebraska, Burton A. Weichenthal, David D. Baltensperger, Kenneth P. Vogel
Nebraska Beef Cattle Reports
Forage quality testing was completed on annual forages grown during 1998 and/or 1999. Included were spring cereals, legumes and summer annuals like sorghum and millets. Using a single cut harvest system when the majority of summer annuals had produced seed heads, crude protein (CP) was generally more than 8% and total digestible nutrients (TDN) more than 63% of dry matter. Annual legumes had 12 to 18% CP and more than 63% TDN. Pearl and irrigated foxtail millets had higher crude protein levels than sorghum forages, but nitrate levels were also higher. Some mineral contents varied by location and associated management.
Relationships Of Chute-Side Measurements To Carcass Measurements, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer
Relationships Of Chute-Side Measurements To Carcass Measurements, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer
Nebraska Beef Cattle Reports
Three data sets were compiled to determine the relationship of weight, performance, hip height and ultrasound-measured fat thickness to hot carcass weight and fat thickness. Weight is generally the best predictor of relative differences in carcass weight at any time in the production system. Hip heights do not predict relative differences in carcass weight. Although the combination of hip height and weight is a more precise indicator of carcass weight than is hip height alone, generally this combination is inferior to weight alone. Only ultrasound-measured fat thickness predicted relative differences in fat thickness. Prediction of relative differences in carcass weight …
Evaluation Of Cow And Calf Performance And Profit Potential In Beef Systems, Rosemary Anderson, Richard J. Rasby, Terry J. Klopfenstein, Casey Macken
Evaluation Of Cow And Calf Performance And Profit Potential In Beef Systems, Rosemary Anderson, Richard J. Rasby, Terry J. Klopfenstein, Casey Macken
Nebraska Beef Cattle Reports
A three-year experiment was conducted to determine the production efficiencies of two beef systems. Spring-calving, crossbred cows were either wintered on pasture (Control System) or on corn stalks (Treatment System). Control System steers were transported to a feedlot, fed a finishing diet and harvested. Treatment System steers were wintered on corn stalks, grazed pasture, fed a finishing diet, and harvested. Cow weights and condition differed but pregnancy rates were similar. Control System steers spent more days in the feedlot, had lower feed conversions and higher marbling scores. Treatment System steers had higher average daily gains and produced heavier carcasses.
Ingredient Opportunities For Case-Ready Beef, Mike Baczwaski, Roger W. Mandigo
Ingredient Opportunities For Case-Ready Beef, Mike Baczwaski, Roger W. Mandigo
Nebraska Beef Cattle Reports
Case-ready beef products have grown at a tremendous rate since the early large scale introductions in the mid 1990’s. Estimates exceed 9 billion pieces in the near future, up from 500 million in 1997 and 1.2 billion in 2000. The key producers of case-ready beef products are fresh-meat processors and retailer co-packers and the list continues to grow rapidly. Justification for producers and consumers includes better-in-stock at retail or less out-of-stock on a 24-hour basis, labor availability at retail level, less shrink, greater cost savings, and most importantly consumer satisfaction, consistency, tenderness, juiciness and improved food safety.
The Effects Of Tumbler Volume On Roasted Beef Quality, Mike Baczwaski, Roger W. Mandigo, Jesus Velazco
The Effects Of Tumbler Volume On Roasted Beef Quality, Mike Baczwaski, Roger W. Mandigo, Jesus Velazco
Nebraska Beef Cattle Reports
Semitendinosus beef muscles (n = 108) were used to determine optimum tumbler volume with regards to meat quality. Fill capacity of 2/3 meat had lower shear force values than capacities of 1/2 (P = 0.02) and 1/3 (P < 0 .01). Texture profile analysis showed favorable results among treatments. Hardness was lower with 2/3 capacity than 1/2 (P = 0.02) and 1/3 (P = 0.06). Gumminess favored 2/3 capacity over 1/2 (P = 0.02). Springiness favored 1/2 capacity over 1/3 capacity (P < 0.01) and 2/3 capacity (P=0.04). Purge, absorption rate during tumbling, absorption rate after rest, cooking loss and yield had no effect between treatments.
Quality Traits Of Grain- And Grass-Fed Beef: A Review, Perry Brewer, Chris R. Calkins
Quality Traits Of Grain- And Grass-Fed Beef: A Review, Perry Brewer, Chris R. Calkins
Nebraska Beef Cattle Reports
Carcasses from grass-fed beef have lower fat thickness and lighter carcass weights, which increases the risk for cold shortening and reduces muscle proteolysis, both of which would reduce beef tenderness. A review of nine research papers indicates grass-fed beef is lower in tenderness (both from shear force and by taste panel), flavor and overall acceptability/desirability ratings.
Carcass And Palatability Characteristics Of Calf-Fed And Yearling Finished Steers, Perry Brewer, Rosemary Anderson, Chris R. Calkins, Terry J. Klopfenstein, Richard J. Rasby
Carcass And Palatability Characteristics Of Calf-Fed And Yearling Finished Steers, Perry Brewer, Rosemary Anderson, Chris R. Calkins, Terry J. Klopfenstein, Richard J. Rasby
Nebraska Beef Cattle Reports
Steers finished in two management systems were used to compare carcass and palatability characteristics. Calves (n=34) were finished on a high concentrate diet for 203 days. Yearlings (n=42) grazed forages followed by 93 days on a high concentrate diet. Calves had higher marbling scores, lower shear force values and higher sensory ratings for tenderness, flavor and overall acceptability. Compared at equal marbling scores, calves had lower shear force values and higher sensory ratings for tenderness and overall acceptability. The risk of steaks being classified as “tough” was higher in yearlings, but relatively low, especially at extended aging times.
Adjustments For Wind Speed And Solar Radiation To The Temperature-Humidity Index, Shane Davis, Terry L. Mader
Adjustments For Wind Speed And Solar Radiation To The Temperature-Humidity Index, Shane Davis, Terry L. Mader
Nebraska Beef Cattle Reports
Data from three separate feedlot finishing trials were combined into one data set to determine wind speed and solar radiation adjustments to the temperature- humidity index equation based on degree of panting and ambient environmental conditions. Regression equations were used to determine the relationship between observed panting and current temperature-humidity index, wind speed and solar radiation for developing correction factors. Based on these calculations, for each 1 mile/ hour increase in wind speed, THI should be decreased approximately 1 unit, and for each 3 Langley increase in solar radiation or 10% increase in cloud cover, THI should be decreased approximately …
Carbon Sequestration Following Beef Cattle Feedlot Manure, Compost, And Fertilizer Applications, Bahman Eghball, Daniel Ginting
Carbon Sequestration Following Beef Cattle Feedlot Manure, Compost, And Fertilizer Applications, Bahman Eghball, Daniel Ginting
Nebraska Beef Cattle Reports
Manure or compost application can increase carbon (C) sequestration in the soil since these organic sources contain significant amounts of C, which is a major constituent of soil organic matter. An experiment was conducted from 1992 to 1996 to evaluate the effects of annual or biennial N- and P-based manure or composted manure application on soil C sequestration. Fertilized and unfertilized checks were also included. About 25% of applied manure C and 36% of applied compost C remained in the surface (0-6 inch) soil after four years of application, indicating greater C sequestration with composted than noncomposted manure. Soil C …
Evaluation Of Buffering Agents In Feedlot Diets For Cattle, Travis Farran, Galen E. Erickson, Terry J. Klopfenstein
Evaluation Of Buffering Agents In Feedlot Diets For Cattle, Travis Farran, Galen E. Erickson, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Six ruminally cannulated heifers were used in a 6 x 6 Latin square to determine effects of Acid Buf, sodium bicarbonate and Rumensin on severity of acidosis and feeding behavior when fed to cattle consuming high grain finishing diets. Heifers received diets containing no added buffer, Acid Buf at 0.75% or 1.25% DM, sodium bicarbonate at 1.25% DM, 28 grams/ton Rumensin, or 28 grams/ton Rumensin + 0.75% DM Acid Buf. Heifers were adapted to dietary treatments 9 days before a 5-day data collection period. Animals fed Acid Buf and sodium bicarbonate had a higher average ruminal pH. Feeding Rumensin and …
Intervention Strategies For Reduction Of E. Coli O157:H7 In Feedlot Steers, Jeffrey Folmer, Casey Macken, Galen E. Erickson, Terry J. Klopfenstein, Mindy Brashears, Rodney A. Moxley, David R. Smith, Suzanne Hinkley
Intervention Strategies For Reduction Of E. Coli O157:H7 In Feedlot Steers, Jeffrey Folmer, Casey Macken, Galen E. Erickson, Terry J. Klopfenstein, Mindy Brashears, Rodney A. Moxley, David R. Smith, Suzanne Hinkley
Nebraska Beef Cattle Reports
Two experiments were conducted to evaluate the effects of three intervention strategies on the prevalence of E. coli O157:H7 in feedlot steers. In both experiments, 432 steers were assigned to one of 54 pens. Intervention strategies were two competitive exclusion products, monthly pen cleaning. In Experiment 2 a diet change treatment was imposed prior to slaughter. No differences in performance or carcass yield were observed for the competitive exclusion products or the pen cleaning treatments, compared to the control. However, changing the finishing diet prior to slaughter decreased steer performance. We also observed a nonsignificant decrease in the prevalence of …
Impact Of Manure Application On Phosphorus In Surface Runoff And Soil Erosion, Christina Gossin, Gregory J. Teichmeier, Galen E. Erickson, Terry J. Klopfenstein, Daniel T. Walters
Impact Of Manure Application On Phosphorus In Surface Runoff And Soil Erosion, Christina Gossin, Gregory J. Teichmeier, Galen E. Erickson, Terry J. Klopfenstein, Daniel T. Walters
Nebraska Beef Cattle Reports
Effects of method of manure management and dietary P were compared on 21 natural runoff plots to monitor the long-term impact of dietary P to P losses in runoff and erosion. Reducing feed P resulted in a 33% reduction in manure P content and soil test P buildup and runoff losses of P also were directly proportional to feed P inputs. The timing and management of manure are also important considerations for controlling P losses in runoff in the year of application. However, residual effects of timing and management are probably small. Management criteria designed to assess the potential for …
Summer Vs. Winter Growth Promotant Strategies For Intact Yearling Heifers, Wanda Kreikemeier, Terry L. Mader
Summer Vs. Winter Growth Promotant Strategies For Intact Yearling Heifers, Wanda Kreikemeier, Terry L. Mader
Nebraska Beef Cattle Reports
A winter and a summer trial were conducted to evaluate growth promoting strategies among season for yearling heifers fed feedlot finishing diets. Two hundred seventy Angus crossbred intact yearling heifers were used for each trial. Daily dry matter intake and daily water intake were recorded and average daily gain and feed efficiency were calculated. A growth promotant by season interaction was found for dry matter intake only. Performance was improved in both summer and winter when a growth promoting system was used. In the summer, adding melengestrol acetate to estrogenic and androgenic implants strategies tended to stimulate DMI, while in …
Feeding Kelp Meal In Feedlot Diets, Wanda Kreikemeier, Terry L. Mader, Shane Davis, Dan Colling
Feeding Kelp Meal In Feedlot Diets, Wanda Kreikemeier, Terry L. Mader, Shane Davis, Dan Colling
Nebraska Beef Cattle Reports
Three trials were conducted to assess the effects of feeding kelp meal to feedlot cattle. In Trial 1, two commercial feedlots were utilized to determine the effects of kelp meal fed to finishing steers exposed to heat stress. Trial 2 was conducted to evaluate the effects of feeding kelp meal in receiving feedlot steer diets. Trial 3 assessed the effects of kelp meal on performance and carcass characteristics when finishing feedlot heifers were exposed to heat stress. Panting scores were reduced in commercial pens of cattle fed kelp meal while dry matter intakes were maintained. Water intake and dry matter …
Estimation Of Rumen Undegradable Protein In Forages By Using Neutral Detergent Insoluble Nitrogen At A Single In Situ Incubation Time Point, Mariela Lamothe, Terry J. Klopfenstein
Estimation Of Rumen Undegradable Protein In Forages By Using Neutral Detergent Insoluble Nitrogen At A Single In Situ Incubation Time Point, Mariela Lamothe, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Neutral detergent insoluble nitrogen (NDIN) was used as a direct estimate of UIP. Forage samples collected from upland range and subirrigated meadow sites over the summer were incubated in situ for a time equivalent to a mean retention time estimated from the digestibility of the forage plus 10 hour to account for a lag in passage of particles from the rumen. Samples also were incubated for 75% of the estimated total mean retention time. The UIP values obtained from the fractional rates of degradation and passage were highly correlated with those estimated from samples incubated for 75% of total mean …
Microbial Protein Production In Gestating Cows Supplemented With Different Sources Of Rumen Degradable Protein Grazing Dormant Range, Mariela Lamothe, Terry J. Klopfenstein, Don C. Adams, Jacqueline A. Musgrave, Galen E. Erickson
Microbial Protein Production In Gestating Cows Supplemented With Different Sources Of Rumen Degradable Protein Grazing Dormant Range, Mariela Lamothe, Terry J. Klopfenstein, Don C. Adams, Jacqueline A. Musgrave, Galen E. Erickson
Nebraska Beef Cattle Reports
Twenty-four gestating spring calving cows grazing dormant native range were used to determine the effect of two different sources of DIP supplementation in the winter. Supplementation treatments were: 1) supplement containing urea as a source of non-protein nitrogen, 2) corn gluten feed (CGF) as a source of true protein, and 3) no supplement . Forage intake was greater for cows supplemented with urea compared to no supplement, and forage intake tended be greater for cows supplemented with urea than CGF. Microbial protein (MCP) synthesis estimated from urinary excretion of allantoin was greater for cows receiving urea than CGF or no …
Value Of Dry Distillers Grains In High-Forage Diets And Effect Of Supplementation Frequency, Tim Loy, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken
Value Of Dry Distillers Grains In High-Forage Diets And Effect Of Supplementation Frequency, Tim Loy, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken
Nebraska Beef Cattle Reports
An experiment was conducted with 120 crossbred heifers to determine the value of dry distillers grains (DDG) in high-forage diets, and to evaluate the effect of supplementing daily compared to three times weekly. Heifers were fed to consume grass hay ad libitum and supplemented with DDG, dry rolled corn (DRC), or DRC with corn gluten meal (DRC+CGM). Supplements were fed at two levels and offered either daily or three times per week in equal proportions. Heifers supplemented daily ate more hay, gained faster (1.37 vs. 1.24 lb per day), but were not more efficient than those supplemented on alternate days. …
Sorting Strategies For Yearlings, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer, Mark Blackford
Sorting Strategies For Yearlings, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer, Mark Blackford
Nebraska Beef Cattle Reports
One hundred sixty medium-framed English-cross steers were used in each year of a two-year study to determine effects of three sorting strategies on performance, carcass characteristics and profitability in an extensive beef production system. Sorting by weight before the grazing period or entering the feedlot decreased variation in carcass weight. Sorting by weight before the grazing period increased marbling scores and resulted in significantly higher premiums. However, no sorting strategy significantly increased carcass weight or improved profitability.
Amino Acid Supplementation To Growing Heifers Fed Soypass®, James C. Macdonald, Terry J. Klopfenstein, Casey Macken
Amino Acid Supplementation To Growing Heifers Fed Soypass®, James C. Macdonald, Terry J. Klopfenstein, Casey Macken
Nebraska Beef Cattle Reports
Sixty individually fed heifers were used in an 84-day growing trial to determine effects of adding rumen protected methionine and/or bloodmeal on performance of growing heifers supplemented with Soypass®. Treatments were designed to be a 2x2 factorial with diets supplemented with or without rumen protected methionine and bloodmeal (0.3% of DM) to provide 0.72 g per day of additional histidine as factors. The rumen protected methionine source, Smartamine M®, provided 1.85 g per day of additional methionine. No statistical differences in performance among treatments were observed, suggesting growing animals fed Soypass® do not benefit from addition of supplemental rumen protected …