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June Versus March Calving For The Nebraska Sandhills: Production Traits, Don C. Adams, Dick Clark, Russ Sandberg, Gordon Carriker, Terry J. Klopfenstein, Todd Milton
June Versus March Calving For The Nebraska Sandhills: Production Traits, Don C. Adams, Dick Clark, Russ Sandberg, Gordon Carriker, Terry J. Klopfenstein, Todd Milton
Nebraska Beef Cattle Reports
Our objective was to determine if labor and purchased inputs could be reduced and profitability improved by matching lactation (i.e., calving date) with nutrient content of grazed forages to extend the grazing season in beef cow/calf systems. By adjusting a traditional March calving date to a nontraditional June calving date, nearly 2 tons of harvested feed/cow was replaced by grazing. Feeding and calving labor inputs of mature cows were 61% lower for the June calving compared to the March calving system. Weaning rates were comparable between March and June calving systems. Weaning weights for June-born calves were 70 lbs lighter …
Managing Heat Stress In Feedlot Cattle Using Sprinklers, Shane Davis, Terry L. Mader, Wanda Cerkoney
Managing Heat Stress In Feedlot Cattle Using Sprinklers, Shane Davis, Terry L. Mader, Wanda Cerkoney
Nebraska Beef Cattle Reports
Ninety-six Bos taurus steers were used to determine the effect of water application to feedlot mounds on performance, behavior and tympanic temperature of steers and microclimatic conditions of the mounds. Steers were assigned to 12 pens subjected to no water application (CON), water applied between 1000 and 1200 (AM), or 1400 and 1600 hr (PM). Water application lowered soil temperatures of the mounds with little effect on temperature-humidity index. Tympanic temperatures were lowered by treatment. Performance variables were not affected; however, AM steers were more efficient than PM steers.
The Effects Of Post-Harvest Time And Temperature On Glycolytic Potential Of Beef Muscle, Dana J. Hanson, Chris R. Calkins
The Effects Of Post-Harvest Time And Temperature On Glycolytic Potential Of Beef Muscle, Dana J. Hanson, Chris R. Calkins
Nebraska Beef Cattle Reports
The objectives of this study were to determine if post mortem temperature affects extent of glycogen metabolism and if sampling time influences glycolytic potential values in muscle. Beef longissimus muscles entered rigor mortis at two different temperatures and were sampled at 45 minutes post mortem, rigor mortis and 24 hours post mortem to determine the glycolytic potential of the muscle. Post mortem temperature had little effect on the glycolytic potential of beef muscle. Glycolytic potential values from samples removed early post mortem were underestimated when compared to samples taken at 24 hours post mortem.
2001 Beef Cattle Report
Nebraska Beef Cattle Reports
Contents
Cow/Calf
A Comparison of Beef Cattle Crossbreeding Systems Assuming Value-Based Marketing
June versus March Calving for the Nebraska Sandhills: Production Traits
June versus March Calving for the Nebraska Sandhills: Economic Comparisons
June versus March Calving for the Nebraska Sandhills: Economic Risk Analysis
Protein Supplements and Performance of Cows and Calves in June-Calving Production Systems
Performance and Economics of Winter Supplementing Pregnant Heifers Based on the Metabolizable Protein System
Forage Intake and Nutrient Balance of Heifers Grazing Sandhills Winter Range
Summer Grazing and Fall Grazing Pressure Effects on Protein Content and Digestibility of Fall Range Diets
Annual Forage Production and …
Evaluation Of 1996 Beef Cattle Nrc Model And Development Of Net Energy Modifiers, Hushton Block, Trey Patterson, Terry J. Klopfenstein, John Moore
Evaluation Of 1996 Beef Cattle Nrc Model And Development Of Net Energy Modifiers, Hushton Block, Trey Patterson, Terry J. Klopfenstein, John Moore
Nebraska Beef Cattle Reports
Data from 325 treatment means in 35 previous beef cattle feeding studies were used to evaluate the 1996 NRC model for accuracy of gain predictions and to develop predictions of net energy adjusters for use with the model. The model was found to inaccurately predict gain of cattle fed diets varying in ingredients and energy density. Net energy adjusters were used to achieve accurate prediction of gain for each observation and then equations were developed for predicting the level of net energy adjustment required to improve accuracy of gain prediction.
June Versus March Calving For The Nebraska Sandhills: Economic Risk Analysis, Gordon Carriker, Dick Clark, Don C. Adams, Russ Sandberg
June Versus March Calving For The Nebraska Sandhills: Economic Risk Analysis, Gordon Carriker, Dick Clark, Don C. Adams, Russ Sandberg
Nebraska Beef Cattle Reports
Price risk analysis of economic and financial net returns from June and March calving systems was used to rank and identify preferred production/sale strategies according to risk preferences of producers. Analysis of economic net returns identified selling a June-born steer at weaning from the breeding on meadow (meadow-bred) treatment as preferred strategy regardless of risk preferences. Post-weaning, selling a June-born finished yearling steer from the meadow-bred treatment was ranked highest. Analysis of financial net returns identified selling a June-born yearling steer from the meadow-bred treatment prior to summer grazing as preferred for all but those strongly risk averse; selling a …
Effect Of Corn Processing On Degradable Intake Protein Requirement Of Finishing Cattle, Rob Cooper, Terry J. Klopfenstein, Doug Jordan, Todd Milton
Effect Of Corn Processing On Degradable Intake Protein Requirement Of Finishing Cattle, Rob Cooper, Terry J. Klopfenstein, Doug Jordan, Todd Milton
Nebraska Beef Cattle Reports
Three finishing trials were conducted to determine effect of corn processing on degradable intake protein requirement of feedlot cattle. Finishing diets consisted of 82% processed corn which was either dry rolled, high moisture, or steam flaked. Degradable intake protein levels were achieved by adding 0 to 2.0% urea (DM basis) to the control diets. Estimates of degradable intake protein requirement for a dry-rolled corn-based diet were approximately 6.3% of dietary DM. Degradable intake protein requirement for high-moisture corn-based diets was approximately 10% of dietary DM. Degradable intake protein requirement for steam-flaked corn-based diet was between 7 and 9.5% of dietary …
Economic Evaluation Of Corn Processing For Finishing Cattle, Rob Cooper, Todd Milton, Terry J. Klopfenstein, Dick Clark
Economic Evaluation Of Corn Processing For Finishing Cattle, Rob Cooper, Todd Milton, Terry J. Klopfenstein, Dick Clark
Nebraska Beef Cattle Reports
A finishing trial was conducted to determine performance of steers fed dry-rolled, high-moisture and steamflaked corn-based diets. High-moisture corn and steam-flaked corn were determined to have 100% and 108% the value of dry-rolled corn, respectively. Estimated costs of corn processing ($/ton) ranged from $1.44 to $1.60 for dry-rolled corn, $1.98 to $2.34 for high-moisture corn, and $6.79 to $7.16 for steam-flaked corn. Economics of high-moisture corn are dependent on the discount at which it is purchased to dry corn. Economics of steam-flaked corn are dependent on corn price, but appear attractive at prices common in Nebraska.
June Versus March Calving For The Nebraska Sandhills: Economic Comparisons, Gordon Carriker, Dick Clark, Don C. Adams, Russ Sandberg
June Versus March Calving For The Nebraska Sandhills: Economic Comparisons, Gordon Carriker, Dick Clark, Don C. Adams, Russ Sandberg
Nebraska Beef Cattle Reports
Costs and returns of June and March calving systems were compared at four production phases. Financial costs of the June system were lowest, due primarily to lower costs of producing a weaned calf. Post-weaning financial and economic costs at each phase were nearly identical. Selling June-born steer calves at January weaning would double net returns compared to selling March-born steer calves at October weaning due to lower costs and higher market prices. Net returns for June-born steer calves retained beyond weaning are highest if calves are retained as yearlings and finished. Calves finished as calf-feds provided the highest net returns …
Effects Of Feeding Regimen On Performance, Behavior And Body Temperature Of Feedlot Steers, Shane Davis, Terry L. Mader, Wanda Cerkoney
Effects Of Feeding Regimen On Performance, Behavior And Body Temperature Of Feedlot Steers, Shane Davis, Terry L. Mader, Wanda Cerkoney
Nebraska Beef Cattle Reports
One hundred forty-four predominantly Angus x Charolais steers were used to determine effects of different feeding regimens on performance, behavior and tympanic temperatures of steers under environmental heat stress. Steers were assigned to one of three treatments: 1) ad libitum fed at 0800 hr (ADLIB); 2) fed at 1600 hr with bunks slick by 0800 hr (BKMGT); and 3) fed 85% of predicted DMI at 1600 hr (LIMFD). Treatments were imposed for 23 days after which all steers were allowed ad libitum access to feed at 0800 hr. Overall performance was not affected by treatment. Altering feed time and amount …
Phosphorus And Nitrogen-Based Beef Cattle Manure Or Compost Application To Corn, Bahman Eghball
Phosphorus And Nitrogen-Based Beef Cattle Manure Or Compost Application To Corn, Bahman Eghball
Nebraska Beef Cattle Reports
This study was conducted to evaluate effects of P and N-based manure and compost applications on corn yield and soil P level. Annual or biennial manure or compost application resulted in corn grain yields similar to those with chemical fertilizer application. P-based manure or compost application resulted in similar corn grain yield but significantly less soil P build-up than N-based treatments. Estimated N availability was 40% for manure and 15% for compost in the first year and was 18% for manure and 8% for compost in the second year after application.
Impact Of Grazing Corn Stalks In The Spring On Crop Yields, Galen E. Erickson, Terry J. Klopfenstein, D. J. Jordon, Walker Luedtke, Gary Lesoing
Impact Of Grazing Corn Stalks In The Spring On Crop Yields, Galen E. Erickson, Terry J. Klopfenstein, D. J. Jordon, Walker Luedtke, Gary Lesoing
Nebraska Beef Cattle Reports
A two-year experiment was designed to determine the impact of grazing corn residue during the spring on subsequent soybean yields in a corn-soybean rotation. Tillage treatments consisting of ridge-till, fall-till, spring-till, and no-till were also evaluated to determine if yields could be maintained by alleviating compaction from grazing in the spring. Grazing treatments overall, and specifically in the ridge-till and no-till systems, resulted in increased yields. Residue cover was also more sensitive to changes in tillage rather than grazing; however, both treatments decreased residue cover.
The Role Of Muscle Glycogen In Dark Cutting Beef., Dana J. Hanson, Kevin Kirchofer, Chris R. Calkins
The Role Of Muscle Glycogen In Dark Cutting Beef., Dana J. Hanson, Kevin Kirchofer, Chris R. Calkins
Nebraska Beef Cattle Reports
Dark cutting beef occurs when muscle glycogen levels are depleted prior to slaughter. Without glycogen, lactic acid is not produced in postmortem muscle, causing a higher than normal muscle pH. This research was conducted to identify the threshold level of glycogen where the dark cutting condition is likely to occur. These data from muscles varying widely in pH suggest that muscle glycogen levels need to be at or above 80 mmol/kg to prevent the dark cutting beef condition.
Protein Supplements And Performance Of Cows And Calves In June-Calving Production Systems, Amelia Hopkin, Don C. Adams, Terry J. Klopfenstein, Todd Milton, Dick Clark
Protein Supplements And Performance Of Cows And Calves In June-Calving Production Systems, Amelia Hopkin, Don C. Adams, Terry J. Klopfenstein, Todd Milton, Dick Clark
Nebraska Beef Cattle Reports
Lactating, June-calving cows that received protein supplement January through March maintained a lower body condition than dry June cows. Dry, nonsupplemented cows lost more body condition compared to dry, supplemented cows over that same time period. June-born steers wintered at a low rate of gain (.4 lb/day) had higher daily gains on sub-irrigated meadow during May than June born steers wintered at a higher rate of gain (1.6 lb/day). Supplemental protein fed during summer grazing on range increased daily gains for steers wintered at both high and low gains compared to non-supplemented steers.
Wet Corn Gluten Feed Supplementation Of Calves Grazing Corn Residue, D. J. Jordon, Terry J. Klopfenstein, Todd Milton
Wet Corn Gluten Feed Supplementation Of Calves Grazing Corn Residue, D. J. Jordon, Terry J. Klopfenstein, Todd Milton
Nebraska Beef Cattle Reports
Incremental levels of wet corn gluten feed were fed to calves grazing corn residues. Based on statistical and economical analysis of the data collected, feeding wet corn gluten feed (5.0-6.5 lb/ head/day; DM basis) will increase stocking rate on corn residue and reduce winter costs by 11%. Given that 3.5 lb DM/day wet corn gluten feed will meet the protein and phosphorus needs of calves, and feeding above 6.0 lb/d will not increase gains, wet corn gluten feed should be fed at 3.5-6.0 lb DM/day, producing gains from 1.28- 1.88 lb/day.
Fiber Type Composition Of The Beef Chuck And Round, Kevin Kirchofer, Chris R. Calkins
Fiber Type Composition Of The Beef Chuck And Round, Kevin Kirchofer, Chris R. Calkins
Nebraska Beef Cattle Reports
The fiber type composition of 38 muscles of the beef chuck and round was studied to facilitate optimal muscle use in value-added products. Select grade chucks and rounds (n=4 each) were used. Muscles containing greater than 40% &#;-red fiber numbers were classified as red; greater than 40%&#;&#;&#;-white were classified as white. All others were classified as intermediate. Nine of 12 round muscles were white, while chuck muscles were equally dispersed between red (10 of 26), intermediate (9 of 26), and white (7 of 26), indicating variation among muscles of the chuck, which may create differences in processing characteristics.
Influence Of Restricted Intake And Reduced Dietary Starch On Colonic Ph And E. Coli Prevalence, Tim Loy, Casey Wilson, Doreen Baily, Terry J. Klopfenstein, Rodney A. Moxley, David R. Smith, Spring Younts
Influence Of Restricted Intake And Reduced Dietary Starch On Colonic Ph And E. Coli Prevalence, Tim Loy, Casey Wilson, Doreen Baily, Terry J. Klopfenstein, Rodney A. Moxley, David R. Smith, Spring Younts
Nebraska Beef Cattle Reports
Ninety feedlot steers were used to test the effects of reducing dietary starch and intake on colonic pH, VFA, total and acid-resistant coliform and E. coli populations, and E. coli O157:H7 shedding. When corn bran and wet corn gluten feed (WCGF), or high moisture corn and WCGF were substituted for dry rolled corn, colonic pH increased while VFA concentration decreased. The corn bran and WCGF diet reduced acid-resistant E. coli shedding. Restricting intake increased colonic pH and decreased VFA concentration, but did not affect acid-resistant E. colishedding. Prevalence of E. coliO157:H7 was not affected by diet or intake.
Implant Programs For Feedlot Heifers Using Synovex® Plus™, Casey Macken, Todd Milton, Bill Dicke, Dave Mcclellan, Frank Prouty
Implant Programs For Feedlot Heifers Using Synovex® Plus™, Casey Macken, Todd Milton, Bill Dicke, Dave Mcclellan, Frank Prouty
Nebraska Beef Cattle Reports
Two commercial feedyard experiments evaluated implant strategies for feedlot heifers. In both experiments, implanting heifers with Synovex Plus increased ADG compared to heifers implanted with Finaplix-H and fed MGA. In Experiment 1, implanting heifers with Synovex Plus improved feed conversion and increased live basis net returns, and the use of MGA with Synovex Plus increased carcass merit basis net returns and had similar marbling scores compared with Finaplix-H and MGA.
Restricted Feeding Strategies For Reducing Heat Load Of Yearling Steers, Terry L. Mader, Simone Holt, Tony Scott, Shane Davis
Restricted Feeding Strategies For Reducing Heat Load Of Yearling Steers, Terry L. Mader, Simone Holt, Tony Scott, Shane Davis
Nebraska Beef Cattle Reports
Eighty-four Bos taurus crossbred steers were used to investigate effects of level and duration of limit feeding feedlot cattle in a hot environment. Restricting feed intake to 70 to 80% of ad libitum for 21 days duration (RES21) or for 42 days duration (RES42) reduced tympanic temperature in both RES21 and RES42 when compared with ad libitum treatment groups under both thermoneutral and hot conditions. Temperature reduction approached 1.5 F0 depending on time of day. Limit feeding feedlot cattle during early summer is a successful tool for enhancing animal comfort by alleviating the combined effects of high temperatures and …
Changes To The Purine Assay Improve Purine Recovery And Assay Precision, Ryan Mass, Kelly Creighton, Terry J. Klopfenstein
Changes To The Purine Assay Improve Purine Recovery And Assay Precision, Ryan Mass, Kelly Creighton, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Three experiments tested modifications of the purine assay designed to improve estimation of microbial crude protein supply. In Experiment 1, changing hydrolysis conditions from 12 normal perchloric acid to 2 normal increased purine recovery and lowered the coefficient of variation. In Experiment 2, phosphate buffer yielded greater recovery of purines than acetate buffer and using the extraction solution as a wash was less variable than silver nitrate in .005 molar hydrochloric acid. In Experiment 3, purine nitrogen:total microbial nitrogen ratios for five forages were determined by incubating NDF in situ and analyzing them before and after neutral detergent extraction.
Urinary Allantoin Excretion Of Finishing Steers: Effects Of Grain Adaptation And Wet Milling Byproduct Feeding, Ryan Mass, D. J. Jordon, Todd Milton, Terry J. Klopfenstein, Rick Stock
Urinary Allantoin Excretion Of Finishing Steers: Effects Of Grain Adaptation And Wet Milling Byproduct Feeding, Ryan Mass, D. J. Jordon, Todd Milton, Terry J. Klopfenstein, Rick Stock
Nebraska Beef Cattle Reports
A metabolism trial investigated microbial protein supply for finishing cattle. In Phase I, cattle were adapted to a dry-rolled corn diet. Urinary allantoin excretion was positively correlated with TDN supply. In Phase II, cattle were fed that diet or diets with a portion of the corn replaced by one of two levels of the corn wet milling byproducts steep liquor or distillers’ solubles. Byproducts inclusion did not increase microbial crude protein supply, as measured by urinary allantoin excretion. Rumen pH also correlated with microbial crude protein supply.
Dietary Conjugated Linoleic Acids (Cla) And Body Fat Changes, Jess L. Miner, Chris Cederberg, Merlyn K. Nielsen, Xiaoli Chen, Clifton Baile
Dietary Conjugated Linoleic Acids (Cla) And Body Fat Changes, Jess L. Miner, Chris Cederberg, Merlyn K. Nielsen, Xiaoli Chen, Clifton Baile
Nebraska Beef Cattle Reports
A mixture of CLA isomers was fed to mice at 0, 1, and 2% of the diet for 5, 12, or 14 days. Dietary CLA caused a reduction of body fat approaching 50% but did not cause a loss of total body weight. Mice fed CLA also experienced programmed cell death (apoptosis) of fat cells. Certain (not all) CLA isomers are natural components of beef and dairy products but not other foods. Therefore, these observations prompt speculation of an additional health benefit, reduced adiposity — to humans that eat ruminant-derived foods.
Forage Intake And Nutrient Balance Of Heifers Grazing Sandhills Winter Range, Trey Patterson, Don C. Adams, Terry J. Klopfenstein
Forage Intake And Nutrient Balance Of Heifers Grazing Sandhills Winter Range, Trey Patterson, Don C. Adams, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Two experiments with pregnant heifers grazing winter range investigated effects of supplementation to meet metabolizable protein versus CP requirements. Supplements were fed from October to February, and hay was fed in January and February of the second experiment. Supplementation to meet metabolizable protein requirements decreased weight loss in one experiment. Winter hay feeding reduced weight loss and body condition loss compared to no hay feeding. Forage intake declined from 2.1% of body weight in November to 1.3% in February. Metabolizable protein was deficient when animals were supplemented to meet CP requirements. Supplementation to meet metabolizable protein requirements may improve performance …
Summer Grazing And Fall Grazing Pressure Effects On Protein Content And Digestibility Of Fall Range Diets, Trey Patterson, Terry J. Klopfenstein, Don C. Adams, Walter H. Schacht, Patrick E. Reece, Jacqueline A. Musgrave, Amy Herron
Summer Grazing And Fall Grazing Pressure Effects On Protein Content And Digestibility Of Fall Range Diets, Trey Patterson, Terry J. Klopfenstein, Don C. Adams, Walter H. Schacht, Patrick E. Reece, Jacqueline A. Musgrave, Amy Herron
Nebraska Beef Cattle Reports
In 1997 and in 1998, four blocks of Sandhills range were used to examine summer grazing time and fall grazing pressure effects on fall diet quality. Three pastures within each block were grazed in June, July, or deferred from summer grazing each year. Multiple grazing pressures were created by grazing cows at various stocking rates in the fall. Diets were collected by esophageally fistulated cows. In 1997, diet protein and digestibility declined with increasing grazing pressure. In 1998, there were no effects of grazing pressure on fall diet protein or digestibility. July grazing reduced fall diet protein compared to June …
Undegradable Intake Protein Content Of Corn Steep Compared To Soybean Meal, Trey Patterson, Terry J. Klopfenstein, D. J. Jordon, Casey Wilson, Ryan Mass, Rick Stock
Undegradable Intake Protein Content Of Corn Steep Compared To Soybean Meal, Trey Patterson, Terry J. Klopfenstein, D. J. Jordon, Casey Wilson, Ryan Mass, Rick Stock
Nebraska Beef Cattle Reports
Thirty calves were used in an 84-day growth trial to evaluate protein efficiency of corn steep compared to soybean meal. Calves were individually fed a base diet supplemented with either 1) urea, 2) soybean meal, or 3) corn steep. Soybean meal and corn steep were fed at graded levels replacing urea. In vitro ammonia release analyses showed the protein in both corn steep and soybean meal to be approximately 30% undegradable in the rumen. Calves fed corn steep had similar protein efficiency to calves fed soybean meal, supporting the in vitro data.
Performance And Economics Of Winter Supplementing Pregnant Heifers Based On The Metabolizable Protein System, Trey Patterson, Don C. Adams, Terry J. Klopfenstein, Richard T. Clark, Burke Teichert
Performance And Economics Of Winter Supplementing Pregnant Heifers Based On The Metabolizable Protein System, Trey Patterson, Don C. Adams, Terry J. Klopfenstein, Richard T. Clark, Burke Teichert
Nebraska Beef Cattle Reports
In 1997-1998 and 1998-99, pregnant, March-calving heifers (2,375 head) at two locations of a ranch in Nebraska were used to evaluate the production and economic responses of winter supplementation (September to February) to meet metabolizable protein or CP requirements. Net present value was used to determine the economic benefits of supplement treatments. In 1997-98, metabolizable protein heifers had higher pregnancy rates and expected profitability than CP heifers at one of two locations. In 1998-99, metabolizable protein heifers had higher pregnancy rates and expected profitability at both locations.
Economic Returns Of Wet Byproducts As Cattle Feed, Richard K. Perrin, Terry J. Klopfenstein
Economic Returns Of Wet Byproducts As Cattle Feed, Richard K. Perrin, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Research at the University of Nebraska and other institutions has demonstrated the feasibility of feeding corn sweetener/ethanol industry byproducts directly to cattle in wet form, rather than marketing them as dried feeds. Using a combination of experimental results, survey data and market prices, the average value of these wet feed products was about $130 per ton of dry matter during the 1990s, compared to their alternative value as dried feed of $93 per ton. Given the amounts fed, the annual net benefits of this innovation in Nebraska grew from about $1 million in 1992 to an annual average of about …
Corn Processing Method In Finishing Diets Containing Wet Corn Gluten Feed, Tony Scott, Todd Milton, Terry J. Klopfenstein, Rick Stock
Corn Processing Method In Finishing Diets Containing Wet Corn Gluten Feed, Tony Scott, Todd Milton, Terry J. Klopfenstein, Rick Stock
Nebraska Beef Cattle Reports
Two trials were conducted to determine the effects on performance and carcass characteristics of corn grain diets differing in degree of processing and containing wet corn gluten feed. Generally, more intensive processing methods such as fine-grinding, high moisture ensiling, and steam-flaking resulted in lower daily feed consumption compared to feeding rolled or whole corn. Feed efficiency and dietary net energy concentration tended to be improved by more intensive processing methods in finishing diets containing wet corn gluten feed.
Programmed Gain Finishing Systems In Yearling Steers Fed Dry-Rolled Corn Or Wet Corn Gluten Feed Finishing Diets, Tony Scott, Todd Milton, Terry J. Klopfenstein
Programmed Gain Finishing Systems In Yearling Steers Fed Dry-Rolled Corn Or Wet Corn Gluten Feed Finishing Diets, Tony Scott, Todd Milton, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
One hundred sixty crossbred yearling steers were used in a completely randomized design to determine the response to a programmed gain finishing system in diets with and without wet corn gluten feed. Including a programmed gain phase in the finishing period reduced daily gain, hot carcass weight, fat thickness and marbling score in diets with and without wet corn gluten feed. Diets containing wet corn gluten feed increased daily gain, hot carcass weight and fat thickness compared with diets containing only dry-rolled corn. Programming gain improved efficiency but reduced net return per animal and increased cost of gain versus ad …
A Diagnostic Strategy To Classify Pens Of Feedlot Cattle By The Prevalence Of Escherichia Coli O157:H7 Fecal Shedding, David R. Smith, Spring Younts, Mark Blackford, Todd Milton, Rodney A. Moxley, Jeff Gray, Laura Hungerford, Terry J. Klopfenstein
A Diagnostic Strategy To Classify Pens Of Feedlot Cattle By The Prevalence Of Escherichia Coli O157:H7 Fecal Shedding, David R. Smith, Spring Younts, Mark Blackford, Todd Milton, Rodney A. Moxley, Jeff Gray, Laura Hungerford, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
This study evaluated two pen testing strategies to predict the percentage of cattle in a pen shedding detectable E. coli O157:H7. Culture of a composite fecal sample most accurately detected pens with 37% or more cattle shedding E. coli O157:H7 in feces. A new pen test device most accurately detected pens with 16% or more individuals shedding. The likelihood of detecting E. coli O157:H7 with either method increased as pen prevalence increased. If both pen-level test methods were used together, pens could be classified as high, medium or low prevalence with less labor and expense than testing individual cattle.