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Kansas Agricultural Experiment Station Research Reports

2003

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Articles 31 - 60 of 107

Full-Text Articles in Life Sciences

Effects Of Increasing Crystalline Lysine And Dietary Fat On Finishing Pig Growth Performance (2003), R G. Main, J L. Usry, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2003

Effects Of Increasing Crystalline Lysine And Dietary Fat On Finishing Pig Growth Performance (2003), R G. Main, J L. Usry, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,024 barrows (each initially 157 lb, PIC L337 x C22) were used in a 28-d study to evaluate the effects of increased crystalline amino acids (none versus 4.5 lb/ton of L-lysine HCl plus L-threonine to maintain the proper ratio relative to lysine) and added dietary fat (none, 3 or 6% choice white grease) on finishing pig growth performance. All experimental diets were formulated with a constant true ileal digestible lysine:ME ratio based on NRC, (1998) ingredient values for ME. A minimum true ileal digestible threonine:lysine ratio of 68% and a minimum true ileal digestible methionine + cystine:lysine …

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Effects Of Extruded-Expelled Soybean Meal And Solvent Extracted Soybean Meal Level Of Growth Performance Of Weanling Pigs (2003), K R. Lawrence, C W. Hastad, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2003

Effects Of Extruded-Expelled Soybean Meal And Solvent Extracted Soybean Meal Level Of Growth Performance Of Weanling Pigs (2003), K R. Lawrence, C W. Hastad, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 350 weanling pigs (initially 15.7 lb) were used to evaluate the effects of soybean meal source and level on growth performance of early weaned pigs. Dietary treatments included a control diet containing no soybean meal, or diets containing 20% or 40% of either solvent extracted soybean meal (SBM) or extruded-expelled soybean meal (EESOY). The SBM and EESOY were analyzed for trypsin inhibitor (0.7 mg TI/g and 1.8 mg TI/g, respectively) to ensure quality, and actual crude protein values (46.9% and 48.3% as-fed, respectively) were used in diet formulation. From d 0 to 14, increasing EESOY decreased ADG …

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Effects Of A Heat-Stable Yeast Product And Antibiotics In Diets For Nursery Pigs (2003), C L. Jones, C W. Starkey, Joe D. Hancock Jan 2003

Effects Of A Heat-Stable Yeast Product And Antibiotics In Diets For Nursery Pigs (2003), C L. Jones, C W. Starkey, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

A total of 192 pigs (average initial BW of 15 lb and 21 d of age) were used in a 35-d experiment to determine the effects of a heatstable yeast product on growth performance of nursery pigs fed diets without and with antibiotics. Treatment diets were formulated to: 1.7% lysine for d 0 to 7, 1.5% lysine for d 7 to 21, and 1.3% lysine for d 21 to 35. The treatments were arranged as a 2 × 2 factorial, with main effects of antibiotics (without and with carbadox at 50 g/ton) and yeast (without and with 0.2% Biosaf). All …

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Effects Of Diet Complexity And Replacement Of Soybean Meal On Growth Performance Of Weanling Pigs (2003), E C. Baudon, N Llanes, Joe D. Hancock Jan 2003

Effects Of Diet Complexity And Replacement Of Soybean Meal On Growth Performance Of Weanling Pigs (2003), E C. Baudon, N Llanes, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

A total of 192 pigs (avg initial BW of 13.9 lb and avg initial age of 21 d) was used to determine the effects of complex diet formulations (with plasma protein and whey) in nursery diets with wheat gluten used to replace soybean meal. Treatments were arranged as a 2 x 2 factorial, with main effects of diet complexity (no animal plasma and 10% dried whey vs 7% animal plasma and 20% dried whey) and soybean meal (25% vs none). For d 0 to 14, the complex diet formulations increased ADG while replacement of the soybean meal with wheat gluten …

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Effects Of Bioplus 2b And Levucell Sb On Weanling Pig Growth Performance And Fecal Shedding In Response To Oral Challenge With Salmonella Serovar Typhimurium (2003), M R. Barker, Jerome C. Nietfeld, J Ernest Minton, Steven S. Dritz Jan 2003

Effects Of Bioplus 2b And Levucell Sb On Weanling Pig Growth Performance And Fecal Shedding In Response To Oral Challenge With Salmonella Serovar Typhimurium (2003), M R. Barker, Jerome C. Nietfeld, J Ernest Minton, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Eighty-five pigs (initially 12.9 lb and 15 ±1 d of age) were used in two 28-d trials to determine the effects of the probiotics BioPlus 2B (a bacillus-based product from Chr. Hansen BioSystems), a source of Bacillus subtilis and Bacillus licheniformis, and Levucell SB (an active dry yeast product from Lallemand Animal Nutrition), a yeast (Saccharomyces cerevisiae) product that is a source of mannanoligosaccharides on growth and performance of Salmonella enterica serovar Typhimurium shedding in a young growing pig model. Pigs were fed one of five dietary treatments: 1) A control diet containing no probiotics or antibiotics; 2) the control …

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Dietary Energy Density And Growing-Finishing Pig Performance And Profitability (2003), M G. Young, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2003

Dietary Energy Density And Growing-Finishing Pig Performance And Profitability (2003), M G. Young, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A retrospective analysis of 25 studies (16 at university and 9 at field research facilities) was conducted to model the response in ADG and F/G to increasing dietary energy density and its effect on profitability. Average daily feed intake in the field studies was approximately 30% lower than in the university studies, and as pigs increase in weight in the university studies they transition to a non-energy dependent phase of growth at a lighter weight than those in the field studies. The percentage response in ADG per percent added fat in the university studies was greater for the first 2.5% …

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2003 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 2003

2003 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

No abstract provided.

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Improper Dosing Using Average Cattle Weights (2003), M.F. Spire, James J. Higgins, Larry C. Hollis, Dale A. Blasi Jan 2003

Improper Dosing Using Average Cattle Weights (2003), M.F. Spire, James J. Higgins, Larry C. Hollis, Dale A. Blasi

Kansas Agricultural Experiment Station Research Reports

A retrospective analysis of 6,231 head of stocker and feeder cattle comprising 24 separate lots was conducted to evaluate the extent and degree of improper dosing that would have occurred in individual animals if all animals in each lot were treated with a single dosage level of a pharmaceutical product based upon the average weight of the lot. Nine hundred forty-six head would have been overdosed by 10% or more, while 831 head would have been underdosed by 10% or more. Four hundred thirty-eight head would have been overdosed by 15% or more, while 366 head would have been underdosed …

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Comparison Of Breeding System Costs For Estrus-Synchronization Protocols Plus Artificial Insemination Versus Natural Service (2003), Sandra K. Johnson, S.L. Fogleman, R. Jones Jan 2003

Comparison Of Breeding System Costs For Estrus-Synchronization Protocols Plus Artificial Insemination Versus Natural Service (2003), Sandra K. Johnson, S.L. Fogleman, R. Jones

Kansas Agricultural Experiment Station Research Reports

Breeding system costs were estimated for natural service and various estrous synchronization plus artificial insemination (AI) systems. Cost per pregnancy was lower for natural service than AI; however, for the large herd size the difference was small for some synchronization systems examined. When the value of an AI-sired calf at weaning was included as $25 greater than a natural service sired calf, several synchronization systems had lower breakeven prices than natural service. Assuming skilled labor could be obtained, systems that involved more heat detection time were more profitable than strict timed insemination systems. Producers that can obtain greater returns from …

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Timed Artificial Insemination In Yearling Beef Heifers: 7-11 Cosynch Vs. Cosynch (2003), A.W. Thompson, C.D. Holladay, D.R. Eborn, David M. Grieger Jan 2003

Timed Artificial Insemination In Yearling Beef Heifers: 7-11 Cosynch Vs. Cosynch (2003), A.W. Thompson, C.D. Holladay, D.R. Eborn, David M. Grieger

Kansas Agricultural Experiment Station Research Reports

Previous research demonstrated that an estrus-synchronization program using a short period of melengestrol acetate (MGA) feeding in conjunction with a Cosynch protocol was effective in synchronizing estrus in postpartum beef cows. The objective of our study was to test this synchronization protocol (7-11 Cosynch) in yearling beef heifers in comparison to a Cosynch protocol. Fifty-eight commercial beef replacement heifers were assigned randomly to two protocols: Cosynch (n=29) and 7-11 Cosynch (n=29). Beginning on day 1, heifers in the 7-11 Cosynch protocol were fed MGA (0.5 mg/heifer daily) for 7 days. On day 7, the last day of MGA feeding, the …

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Investigation Of Tenderness Mechanisms In Calcium-Enhanced Muscle, T.E. Lawrence, J.W. Stephens, E. Obuz, J.R. Davis, Michael E. Dikeman Jan 2003

Investigation Of Tenderness Mechanisms In Calcium-Enhanced Muscle, T.E. Lawrence, J.W. Stephens, E. Obuz, J.R. Davis, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

We explored the mechanism(s) of calcium- induced tenderization in calcium-enhanced beef muscle. At 72 hours postmortem, we injected (9% by weight) beef strip loins (n=15) with 0, 0.05, 0.1, 0.2, or 0.4 M calcium chloride (CaCl2) with and without 0.05 M zinc chloride (ZnCl2), and they were then aged until 15 days postmortem. Warner- Bratzler shear force peak values indicated that addition of ZnCl2 drastically inhibited tenderization; however, enhancement with CaCl2 still tended to reduce shear values (P=0.07; 0.55 kg) when ZnCl2 was present. In the absence of ZnCl2, the 0.2 and 0.4 M CaCl2 treatments were 18.9 and 32.1% …

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Heritability And Correlation Estimates Of Warner-Bratzler Shear Force And Marbling Score From Angus-, Charolais-, Hereford-, And Simmental-Sired Cattle (2003), J.A. Minick, E.J. Pollak, D.E. Wilson, E.W. Dressler, Michael E. Dikeman Jan 2003

Heritability And Correlation Estimates Of Warner-Bratzler Shear Force And Marbling Score From Angus-, Charolais-, Hereford-, And Simmental-Sired Cattle (2003), J.A. Minick, E.J. Pollak, D.E. Wilson, E.W. Dressler, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

The objective of this study was to estimate heritabilities and genetic correlations for Warner- Bratzler shear force and marbling score of longissimus steaks from Angus-, Charolais-, Hereford-, and Simmental-sired cattle in the National Cattlemen's Beef Association (NCBA) coordinated Carcass Merit Traits Project funded with Beef Checkoff dollars. There were 700 Angus-sired steers, 691 Charolais-sired steers and heifers, 938 Hereford-sired steers, and 1,167 Simmental-sired steers and heifers in the study. Restricted maximum likelihood estimates of the genetic parameters were determined using a sire model with a sire/maternal grandsire relationship matrix. The heritabilities for Warner-Bratzler shear force and marbling score, respectively, were …

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Rate Of Bloom Of Beef Longissimus Lumborum: Effects Of Muscle Temperature, Age, And Oxygen Exposure Time (2003), C.M. Trater, Melvin C. Hunt Jan 2003

Rate Of Bloom Of Beef Longissimus Lumborum: Effects Of Muscle Temperature, Age, And Oxygen Exposure Time (2003), C.M. Trater, Melvin C. Hunt

Kansas Agricultural Experiment Station Research Reports

Steaks from 12 loins were used to determine the best time and temperature combinations for blooming (development of a bright-red color) of the longissimus muscle at 2, 14, and 26 days postmortem. The lowest temperature (28°F) provided the fastest rate of bloom when the muscle was 2 days postmortem, and 30 minutes were needed to achieve 75% of final bloom color. For meat 14 days old, greater bloom occurred at 35 and 40°F than at 28°F. For meat 26 days old, rate of bloom was equal at all three temperatures. Thus, packers should bloom carcasses one-half hour at 28°F before …

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Antimicrobial Effect Of Buffered Sodium Citrate, Alone Or Combined With Sodium Diacetate, On Total Aerobic Count Of Ground Beef Stored At 39°F (2003), E. Ceylan, James L. Marsden Jan 2003

Antimicrobial Effect Of Buffered Sodium Citrate, Alone Or Combined With Sodium Diacetate, On Total Aerobic Count Of Ground Beef Stored At 39°F (2003), E. Ceylan, James L. Marsden

Kansas Agricultural Experiment Station Research Reports

We studied the antimicrobial efficacy of buffered sodium citrate and a combination of buffered sodium citrate and sodium diacetate on natural aerobic microflora of ground beef stored at 39°F. For non-treated control and 1% buffered sodium citrate, total aerobic count gradually increased from 4.2 log colony forming units (CFU)/gram initially to 9.0 and 8.7 log CFU/gram, respectively, after 10 days. Both treatments reached the spoilage index number of 7.0 log CFU/gram after 5 days. A combination of 1% buffered sodium citrate and 0.1% sodium diacetate resulted in a total aerobic count of 5.9 log CFU/gram (below the spoilage index) after …

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Consumer Valuation Of Steaks With Different Quality Attributes, T. Feldkamp, J. Lusk, Ted C. Schroeder Jan 2003

Consumer Valuation Of Steaks With Different Quality Attributes, T. Feldkamp, J. Lusk, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Determining needs and wants of consumers is important for the beef industry to reverse the downward trend in beef demand during the last two decades. This study used experimental auctions in conjunction with a survey to determine consumer preferences for beef steaks. Four experimental auctions were used to elicit consumers' maximum willingness to pay for five steak types: generic, guaranteed tender, "natural", USDA Choice, and Certified Angus Beef (CAB). Consumers indicated flavor and tenderness were the most important factors when eating steaks, but they believed there was only about a 50% chance a generic steak would adequately meet these criteria. …

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Effect Of Processing Variables On Characteristics Of Steam-Flaked Corn (2003), J.J. Sindt, Sean P. Montgomery, E.R. Loe, James S. Drouillard Jan 2003

Effect Of Processing Variables On Characteristics Of Steam-Flaked Corn (2003), J.J. Sindt, Sean P. Montgomery, E.R. Loe, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

We evaluated tempering moisture concentration, addition of a surfactant to improve moisture uptake, steam conditioning time, and flake density to determine their impact on characteristics of steam-flaked corn. Increasing steam conditioning time from 20 to 40 minutes or adding a surfactant during tempering did not increase final flake moisture concentration, but moisture content of flaked corn was linearly increased by increasing tempering moisture concentration. Addition of Grain Prep® surfactant during tempering decreased (P<0.05) the amount of moisture lost during flaking. Flake durability was increased by increasing tempering moisture concentration, but only if corn was steamed for 40 minutes (tempering moisture x steam time interaction; P<0.10). Decreasing flake density linearly increased both starch availability (P<0.01) and flake durability (P<0.05). In this experiment, tempering moisture concentration had the largest impact on flake moisture content, and flake density was the most influential variable altering flake durability and starch availability.

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High Moisture Tempering Of Corn Before Flaking: Effects On Bacterial Contamination From Houseflies And Fecal Shedding In Finishing Cattle (2003), A.B. Broce, C.M. Gordon, J.J. Sindt, Brandon E. Depenbusch, James S. Drouillard, Randall K. Phebus Jan 2003

High Moisture Tempering Of Corn Before Flaking: Effects On Bacterial Contamination From Houseflies And Fecal Shedding In Finishing Cattle (2003), A.B. Broce, C.M. Gordon, J.J. Sindt, Brandon E. Depenbusch, James S. Drouillard, Randall K. Phebus

Kansas Agricultural Experiment Station Research Reports

Tempered and non-tempered steam-flaked corn samples along with total mixed rations containing either tempered or non-tempered steam-flaked corn were exposed to flies and the environment for 21 hours. Exposure to flies and the environment increased (P0.05) alter microbial counts of total mixed rations regardless of tempering (Table 1). Generic E. coli coliforms were greater in total mixed rations when the corn was tempered, both before and after exposure to flies and the environment (P0.05), but acid-resistant (pH 2) non-E. coli and total fecal coliforms (Table 2) were lower in feces of cattle fed the tempered grain than those fed non-tempered …

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Effects Of Mga In Receiving Diets On Health, Performance, And Carcass Characteristics (2003), M.J. Sulpizio, T.J. Kessen, E.R. Loe, Sean P. Montgomery, J.N. Pike, J.J. Sindt, James S. Drouillard Jan 2003

Effects Of Mga In Receiving Diets On Health, Performance, And Carcass Characteristics (2003), M.J. Sulpizio, T.J. Kessen, E.R. Loe, Sean P. Montgomery, J.N. Pike, J.J. Sindt, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

A trial was conducted using 723 crossbred heifers (468 lb initially) to evaluate the effects of including melengestrol acetate (MGA) in receiving diets on growth performance, morbidity, mortality, and carcass characteristics. Treatments were: 1) MGA included in the receiving diet at a rate of 0.5 mg per heifer daily or 2) no MGA in the receiving diet. Diets were fed once daily and contained 42% steam-flaked corn, 45% alfalfa hay, 6% steep liquor, and 2% tallow; monensin and tylosin were included. Receiving diets were fed for 35 days. After 35 days MGA was fed to all heifers, and cattle were …

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Effect Of Supplemental Carbohydrate Type And Amount Of Ruminally Degradable Protein On Utilization Of Tallgrass-Prairie Hay By Beef Steers (2003), J.I. Arroguy, R.C. Cochran, M. Villarreal, T.A. Wickersham, Donald A. Llewellyn, D.E. Johnson, Evan C. Titgemeyer Jan 2003

Effect Of Supplemental Carbohydrate Type And Amount Of Ruminally Degradable Protein On Utilization Of Tallgrass-Prairie Hay By Beef Steers (2003), J.I. Arroguy, R.C. Cochran, M. Villarreal, T.A. Wickersham, Donald A. Llewellyn, D.E. Johnson, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

This experiment determined the impact of type of supplemental carbohydrate and amount of supplemental ruminally degradable protein (RDP) on intake and digestion of prairie hay. Fourteen ruminally fistulated beef steers were supplemented with one of two carbohydrates (corn starch or the simple sugar glucose) at 0.30% of body weight and one of seven levels of ruminally degradable protein (RDP; 0, 0.015, 0.051, 0.087, 0.123, 0.159, or 0.195% of body weight). Two additional steers served as controls (non-supplemented steers, i.e., no carbohydrate or RDP supplementation). Forage intake and digestion were substantially improved by increasing amounts of supplemental RDP. Supplemental carbohydrate with …

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Ruminal Ammonia Load Does Not Affect Histidine Utilization In Growing Steers (2003), K.C. Candler, M.S. Awawdeh, D.P. Gnad, Evan C. Titgemeyer Jan 2003

Ruminal Ammonia Load Does Not Affect Histidine Utilization In Growing Steers (2003), K.C. Candler, M.S. Awawdeh, D.P. Gnad, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Fermentation of dietary protein in the rumen leads to ammonia absorption, which could impair amino acid utilization in cattle. Our study was conducted to determine the effects of rumen ammonia load on histidine utilization. Six ruminally cannulated Holstein steers (318 lb) housed in metabolism crates were used in a 6 x 6 Latin square design. Treatments were arranged as a 3 x 2 factorial and included: 0, 1.5, or 3 grams/day L-histidine infused abomasally; and 0 or 80 grams/day urea infused ruminally to supply a metabolic ammonia load. As expected, urea infusions increased rumen ammonia and plasma urea concentrations. No …

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Comparison Of Concentrated Separator Byproduct And Cane Molasses For Finishing Heifers (2003), E.R. Loe, T.J. Kessen, Sean P. Montgomery, J.N. Pike, J.J. Sindt, M.J. Sulpizio, James S. Drouillard Jan 2003

Comparison Of Concentrated Separator Byproduct And Cane Molasses For Finishing Heifers (2003), E.R. Loe, T.J. Kessen, Sean P. Montgomery, J.N. Pike, J.J. Sindt, M.J. Sulpizio, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

We compared concentrated separator byproduct (CSB) to cane molasses on feedlot performance and carcass merit of 394 crossbred yearling beef heifers fed for 148 days. Sugar beet molasses undergoes a process in which approximately half of the sugar is removed, concentrating protein and mineral in CSB. Compared with cane molasses, CSB has more crude protein, ash, and moisture. Two diets based on steam-flaked corn containing either CSB or cane molasses at 5% (dry matter basis) of the diet were fed. Feedlot performance was similar between heifers fed the two diets (P>0.23). Apparent dietary concentrations of net energy for gain …

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Influence Of Low-Level Supplementation With A High-Protein Feed On Performance Of Beef Cows Grazing Tallgrass-Prairie Range During The Fall (2003), Donald A. Llewellyn, R.C. Cochran, T.T. Martson, David M. Grieger, C.G. Farmer, T.A. Wickersham, D.D. Simms Jan 2003

Influence Of Low-Level Supplementation With A High-Protein Feed On Performance Of Beef Cows Grazing Tallgrass-Prairie Range During The Fall (2003), Donald A. Llewellyn, R.C. Cochran, T.T. Martson, David M. Grieger, C.G. Farmer, T.A. Wickersham, D.D. Simms

Kansas Agricultural Experiment Station Research Reports

An experiment was conducted to evaluate the effect of hand feeding a limited quantity of a high-protein supplement during the fall grazing period on cow and calf performance. The time of initiation of supplementation was also evaluated. One-hundred thirty-six multiparous, pregnant, spring-calving cows grazing native range were assigned to supplementation treatments. Control cows received no fall supplementation. Supplemented cows received 0.14% of body weight per day (1.5 lbs per day) of a high-protein supplement (40% crude protein, as-fed basis) approximately 2 months before and after weaning (Aug 15 to Dec 14; weaning = Oct 15) or only after weaning (Oct …

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Effects Of Supplemental Protein Removal On Total And Acid-Resistant E. Coli, Total Coliforms, And Performance In Finishing Steers (2003), M.A. Greenquist, C.M. Gordon, J.J. Sindt, James S. Drouillard, Randall K. Phebus Jan 2003

Effects Of Supplemental Protein Removal On Total And Acid-Resistant E. Coli, Total Coliforms, And Performance In Finishing Steers (2003), M.A. Greenquist, C.M. Gordon, J.J. Sindt, James S. Drouillard, Randall K. Phebus

Kansas Agricultural Experiment Station Research Reports

Fifty-four crossbred finishing steers were used to measure the effects of reducing supplemental protein (nitrogen) on feedlot performance and fecal shedding of acid-resistant Escherichia coli and total coliform bacteria. A control diet (15.0% crude protein; high protein) was compared to a low protein diet (8.9% crude protein; low protein) from which supplemental nitrogen sources (urea and soybean meal) were removed for the last 8 days of the feeding period. Fecal E. coli and coliform populations were measured prior to harvest. Removal of supplemental nitrogen from feedlot cattle diets did not substantially reduce populations of acid-resistant fecal E. coli and coliforms. …

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Performance And Carcass Characteristics Of Yearling Steers And Heifers Fed Agrado™ Throughout The Finishing Period (2003), J.J. Sindt, B. Dicke, T.J. Klopfenstein, L. Borck, James S. Drouillard Jan 2003

Performance And Carcass Characteristics Of Yearling Steers And Heifers Fed Agrado™ Throughout The Finishing Period (2003), J.J. Sindt, B. Dicke, T.J. Klopfenstein, L. Borck, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

A finishing experiment was conducted at a commercial feedlot facility in Larned, Kansas, using 3,295 yearling steers and heifers to evaluate effects of Agrado™ addition to finishing diets. Agrado (ethoxyquin) is a dietary anti-oxidant that protects against oxidative loss of critical vitamins and prevents rancidity and unpalatable odors. Supplementing finishing diets of yearling steers and heifers with 150 ppm Agrado had no measurable effects on growth performance or carcass characteristics.

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Relative Value Of Ruminally Degradable And Undegradable Protein On The Utilization Of Low-Quality Prairie Hay By Steers (2003), T.A. Wickersham, R.C. Cochran, C.G. Farmer, E.A. Klevesahl, J.I. Arroquy, D.E. Johnson, D.P. Gnad, Evan C. Titgemeyer Jan 2003

Relative Value Of Ruminally Degradable And Undegradable Protein On The Utilization Of Low-Quality Prairie Hay By Steers (2003), T.A. Wickersham, R.C. Cochran, C.G. Farmer, E.A. Klevesahl, J.I. Arroquy, D.E. Johnson, D.P. Gnad, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

An experiment was performed to investigate the impact of providing six levels of ruminally degradable protein (RDP; protein that is available to ruminal microbes) in combination with two levels of ruminally undegradable protein (RUP; protein that is not available to the ruminal microbes, but can be digested directly by cattle) on the intake and digestion of low-quality prairie hay. Twelve steers were provided unlimited access to low-quality prairie hay (5.3% crude protein and 71.7% neutral detergent fiber) throughout the trial. To simulate dietary RUP, casein was infused abomasally once daily at either 0 or 0.087% of body weight. To simulate …

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Relationship Of Blood Glucose Concentration At Arrival To Performance And Carcass Characteristics Of Beef Heifers (2003), E.R. Loe, T.J. Kessen, Sean P. Montgomery, J.J. Sindt, M.J. Sulpizio, J.N. Pike, James S. Drouillard Jan 2003

Relationship Of Blood Glucose Concentration At Arrival To Performance And Carcass Characteristics Of Beef Heifers (2003), E.R. Loe, T.J. Kessen, Sean P. Montgomery, J.J. Sindt, M.J. Sulpizio, J.N. Pike, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Crossbred yearling heifers (n = 394) were used to compare the effect of high or low blood glucose measured at arrival on feedlot performance and carcass characteristics. A blood sample was collected when heifers arrived at the Beef Cattle Research Center, and heifers were sorted into two groups: high or low blood glucose. The mean blood glucose concentration of the heifers was 57 ± 2 mg/dL in the low group and 78 ± 2 mg/dL in the high group. Heifers that had low blood glucose at arrival consumed more feed (P=0.02), tended to have increased final bodyweight and rate of …

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Effects Of Flax Supplementation And A Revalor-S Implant On Circulating Insulin-Like Growth Factor 1 (Igf-1) And Muscle Igf-1 Mrna Levels In Finishing Cattle (2003), J.D. Dunn, J.P. Kayser, A.T. Waylan, E.K. Sissom, B.J. Johnson, James S. Drouillard Jan 2003

Effects Of Flax Supplementation And A Revalor-S Implant On Circulating Insulin-Like Growth Factor 1 (Igf-1) And Muscle Igf-1 Mrna Levels In Finishing Cattle (2003), J.D. Dunn, J.P. Kayser, A.T. Waylan, E.K. Sissom, B.J. Johnson, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Sixteen crossbred steers weighing 875 lb were used to evaluate the effects of a 5% ground flaxseed supplement and a combined trenbolone acetate/estradiol (TBA/E2) growth promoting implant, Revalor-S®, on both circulating insulin-like growth factor-1 (IGF-1) and local muscle IGF-1 mRNA concentrations. Steers were randomly assigned to one of four treatments: . 1) Flax/Implant, 2) No Flax/ Implant, 3) Flax/No Implant, 4) No Flax/No Implant. Serum was harvested from blood collected via jugular venipuncture on day 0 (before implantation or flax addition), 14, and 28. Muscle biopsy samples were obtained from the longissimus muscle on days 0, 14, and 28. Implanted …

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Effect Of Melengestrol Acetate (Mga) On Cultured Bovine Muscle Satellite Cell Proliferation And Differentiation (2003), E.K. Sissom, J.P. Kayser, A.T. Waylan, J.D. Dunn, B.J. Johnson Jan 2003

Effect Of Melengestrol Acetate (Mga) On Cultured Bovine Muscle Satellite Cell Proliferation And Differentiation (2003), E.K. Sissom, J.P. Kayser, A.T. Waylan, J.D. Dunn, B.J. Johnson

Kansas Agricultural Experiment Station Research Reports

Melengestrol acetate (MGA) increases growth rate and inhibits estrus in feedlot heifers. Little is known of MGA's effect on skeletal muscle growth and differentiation. The purpose of this trial was to investigate the potential direct effects of MGA on cultured bovine muscle satellite cell proliferation and differentiation. Satellite cells isolated from yearling cattle were used to assess the effect of MGA in a dose titration (0, 1 nM, 10 nM, 100 nM, 1 μM, 10 μM, and 100 μM) study on [3H]-thymidine incorporation. Likewise, satellite cell cultures were allowed to differentiate, and nuclei were stained at 168 hours to determine …

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Estimating The Impact Of Animal Health And Death Loss On Economic Performance Of Feedlot Cattle (2003), M. Irsik, Michael R. Langemeier Jan 2003

Estimating The Impact Of Animal Health And Death Loss On Economic Performance Of Feedlot Cattle (2003), M. Irsik, Michael R. Langemeier

Kansas Agricultural Experiment Station Research Reports

This study examined the impacts of animal health and death loss on the economic performance of feedlot cattle. Using data from two feedlots in western Kansas, the impact of animal health on economic performance was quantified. Death loss and the percentage of animals treated significantly impacted feed conversion, average daily gain, and cost of gain. Feed conversion for a pen of cattle was found to increase by 0.27 lb feed/lb gain and daily gain decreased by 0.08 lb/day for each percentage point increase in death loss. An increase in death loss from 1% to 2% increased cost of gain by …

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Estimates Of Parameters Between Direct And Maternal Genetic Effects For Weaning Weight And Genetic Effects For Carcass Traits In Crossbred Cattle (2003), R.K. Splan, L.V. Cundiff, L.D. Van Vleck, Michael E. Dikeman Jan 2003

Estimates Of Parameters Between Direct And Maternal Genetic Effects For Weaning Weight And Genetic Effects For Carcass Traits In Crossbred Cattle (2003), R.K. Splan, L.V. Cundiff, L.D. Van Vleck, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Estimates of heritabilities and genetic correlations were obtained from weaning weight records of 23,681 crossbred steers and heifers, and carcass data of 4,094 crossbred steers using REML applied to animal models. Direct and maternal heritabilities for weaning weight were 0.14 and 0.19, respectively. The genetic correlation between direct and maternal weaning weight was negative (-0.18). Heritabilities for carcass traits of steers were moderate to large (0.34 to 0.60). Genetic correlations between direct genetic effects for weaning weight and carcass traits were small, except with hot carcass weight (0.70), ribeye area (0.29) and adjusted fat thickness (0.26). Genetic correlations of maternal …

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