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Cattlemen's Day

2000

Articles 1 - 30 of 47

Full-Text Articles in Life Sciences

Effects Of Feeding Two Microbial Additives In Sequence On Growth Performance And Carcass Characteristics Of Finishing Heifers, G.L. Huck, K.K. Kreikemeier, G.A. Ducharme Jan 2000

Effects Of Feeding Two Microbial Additives In Sequence On Growth Performance And Carcass Characteristics Of Finishing Heifers, G.L. Huck, K.K. Kreikemeier, G.A. Ducharme

Kansas Agricultural Experiment Station Research Reports

Four hundred fifty heifers (846 lb) were used in a 126-day experiment to investigate the effects of feeding two microbial additives, Lactobacillus acidophilus BG2FO4 (MicroCell) and Propionibacterium freudenreichii P-63 (MicroCell PB), alone or in sequence, on feedlot growth performance and carcass characteristics. A 21-day step-up period preceded heifers being placed on a final finishing diet containing 10% corn silage, 42% steam-flaked corn, 42% high-moisture corn, 3% soybean meal, and 3% mineral supplement. Premeasured amounts of microbial additive were mixed with water before being mixed directly with the total ration. Treatments consisted of 1) no microbial additive; 2) MicroCell for the ...


Drylot Receiving Program Vs Pasture Conditioning With Micotil® Metaphylaxis For Grazing Stocker Calves, S.I. Paisley, Thomas R. Falkner, F.K. Brazle, Gerald L. Stokka Jan 2000

Drylot Receiving Program Vs Pasture Conditioning With Micotil® Metaphylaxis For Grazing Stocker Calves, S.I. Paisley, Thomas R. Falkner, F.K. Brazle, Gerald L. Stokka

Kansas Agricultural Experiment Station Research Reports

Three stocker cattle field studies were conducted comparing a traditional 4- to 5-week drylot receiving program with injectable antibiotics administered on a pull-and-treat basis versus a pasture-based conditioning program using an initial metaphylaxis with Micotil® followed by immediately placing cattle on grass. Although daily gains were similar (P=.80) for both receiving programs during the first 28 days, pasture conditioning reduced the number of cattle treated and increased (P<.01) daily gains during the subsequent grazing phase.


Effects Of Carnitine On Performance Of Finishing Steers, R.H. Greenwood, C.A. Löest, Evan C. Titgemeyer, James S. Drouillard Jan 2000

Effects Of Carnitine On Performance Of Finishing Steers, R.H. Greenwood, C.A. Löest, Evan C. Titgemeyer, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Ninety-five crossbred steers (787 lb initial body weight) were fed finishing diets (14.5% crude protein) for 129 days. Diets were based on steam-flaked corn and contained 6% alfalfa and 4% tallow. Steers were supplemented with 2 g per day of L-carnitine, or not supplemented (control). Feed intakes, gains, and feed efficiencies were not impacted by carnitine supplementation. However, steers receiving L-carnitine had fatter carcasses as indicated by tendencies (P<.2) for more subcutaneous fat, higher marbling scores, and higher yield grades. Carnitine supplementation may increase fat deposition and alter carcass quality of finishing cattle.


Effects Of Late-Summer Protein Supplementation On Stocker Cattle Performance, Feedlot Gain, And Carcass Traits, T.T. Marston, D.O. Yauk, L.E. Wankel, J.F. Gleghorn Jan 2000

Effects Of Late-Summer Protein Supplementation On Stocker Cattle Performance, Feedlot Gain, And Carcass Traits, T.T. Marston, D.O. Yauk, L.E. Wankel, J.F. Gleghorn

Kansas Agricultural Experiment Station Research Reports

A 2-year trial was conducted to study the effects of feeding an Arsoy™-based, 32% crude protein supplement to stocker cattle grazing late-summer native pastures. During about 90 days of late-summer/fall grazing, the steers efficiently converted the Arsoy supplement (5.3:1, as fed basis) into significantly greater weight gains (55 lb) relative to nonsupplemented contemporaries. Both groups of steers then were finished and slaughtered in commercial facilities to determine if the supplementation program had any carryover effects. Late-summer supplementation did not influence steers' feedlot gain or carcass traits including ribeye area, fat thickness, and quality grade. However, average ...


Refractive Index: A Rapid Method For Determination Of Starch Availability In Grains, J.J. Sindt, Sean P. Montgomery, T.B. Farran, James S. Drouillard Jan 2000

Refractive Index: A Rapid Method For Determination Of Starch Availability In Grains, J.J. Sindt, Sean P. Montgomery, T.B. Farran, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Steam-flaked corn samples were used in a series of experiments to determine if refractive index could be used as a rapid, inexpensive method to predict starch availability. Results were best when samples were incubated for 15 min with 500 to 600 active units of enzyme/gm of grain prior to measuring on a hand-held refractometer. Correlations to starch availability determined from gas production by a commercial lab were R=.64 for whole flakes and R=.79 when samples were ground. Samples of corn flaked to different densities produced estimates of solubility similar to an in situ dry matter disappearance assay ...


Supplemental Progestin Increases Pregnancy Rates In Suckled Beef Cows, G.C. Lamb, J.A. Cartmill, B.A. Hensley, S.E. El-Zarkouny, T.J. Marple, Jeffrey S. Stevenson, David M. Grieger Jan 2000

Supplemental Progestin Increases Pregnancy Rates In Suckled Beef Cows, G.C. Lamb, J.A. Cartmill, B.A. Hensley, S.E. El-Zarkouny, T.J. Marple, Jeffrey S. Stevenson, David M. Grieger

Kansas Agricultural Experiment Station Research Reports

In two experiments, combining a source of progestin with the ovulation synchronization protocol using gonadotropin-releasing hormone plus prostaglandin F2α (GnRH + PGF2α) tended to increase or statistically increase pregnancy rates in suckled cows compared to GnRH + PGF2α alone. These improvements were accomplished without any detected estrus when cows were inseminated and received a second injection of GnRH at 48 hr after PGF2α.


A Survey On The Use Of Blade Tenderizers By Beef Fabrication Plants, C.D. George-Evins, John A. Unruh, James L. Marsden, Curtis L. Kastner Jan 2000

A Survey On The Use Of Blade Tenderizers By Beef Fabrication Plants, C.D. George-Evins, John A. Unruh, James L. Marsden, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

A questionnaire to determine the use of blade tenderizers in beef fabrication facilities was sent to 241 members of the North American Meat Processors Association (NAMP). Eighty-four percent of the 90 respondents used blade tenderizers. These subprimals were at least sometimes tenderized by the following percentages of respondents: tenderloins, 7.9; chuck cuts, 18; round cuts, 36; ribeyes, 38; strip loins, 56; and top sirloin butts, 62. If a processor blade-tenderized a particular cut, they tenderized a majority of their production for that cut, generally with multiple passes through the tenderizer. For example, the 62% of respondents who tenderized top ...


Effect Of Level Of Surface-Spoiled Silage On The Nutritive Value Of Corn Silage-Based Rations, L.A. Whitlock, T. Wistuba, M.K. Siefers, B.E. Brent, K.K. Bolsen, Ronald V. Pope Jan 2000

Effect Of Level Of Surface-Spoiled Silage On The Nutritive Value Of Corn Silage-Based Rations, L.A. Whitlock, T. Wistuba, M.K. Siefers, B.E. Brent, K.K. Bolsen, Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

Twelve ruminally cannulated crossbred steers were used to determine the effects of level of surface-spoiled silages on dry matter (DM) intake and nutrient digestibilities of corn silage-based rations. Irrigated corn was harvested at the 80% milkline stage of maturity and ensiled in 3-ft-deep, pilot-scale, bunker silos and a 9-ft-diameter AgBag®. After 90 days, the bunkers were sealed with a single sheet of polyethylene, and this silage was designated "spoiled". The silage in the AgBag was designated "normal". The four rations contained 90% silage and 10% supplement (DM basis). The silages in the rations were: A) 100% normal; B) 75% normal ...


Effects Of Nonprotein Nitrogen Source In Blocks On Intake And Digestion Of Prairie Hay By Steers, C.A. Löest, James S. Drouillard, B.D. Lambert, A.M. Trater, Evan C. Titgemeyer Jan 2000

Effects Of Nonprotein Nitrogen Source In Blocks On Intake And Digestion Of Prairie Hay By Steers, C.A. Löest, James S. Drouillard, B.D. Lambert, A.M. Trater, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

This intake and digestion study evaluated source of nonprotein nitrogen in cooked molasses blocks supplemented to 18 steers (590 lb) with ad libitum access to prairie hay, Treatments were 1) control (no block), 2) a block containing 60% crude protein with 83% from urea (UREA block), and 3) a block containing 60% crude protein with 42% from urea and 42% from biuret (UREA/BIURET block). Blocks were broken into small pieces to facilitate rapid consumption and fed once daily at .125% of body weight. Forage intake increased by 22%, total intakes (forage plus block) increased by 28%, and digestible organic ...


Effects Of Nonprotein Nitrogen Source In Blocks On Rumen Parameters Of Steers Fed Prairie Hay, C.A. Löest, B.D. Lambert, A.M. Trater, Evan C. Titgemeyer, James S. Drouillard Jan 2000

Effects Of Nonprotein Nitrogen Source In Blocks On Rumen Parameters Of Steers Fed Prairie Hay, C.A. Löest, B.D. Lambert, A.M. Trater, Evan C. Titgemeyer, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Six ruminally cannulated steers (1012 lb) were fed prairie hay ad libitum supplemented with cooked molasses blocks that contained either 60% crude protein 83% of which came from urea (UREA block) or 60% crude protein with 42% from urea and 42% from biuret (UREA/BIURET block). Blocks were broken into small pieces to facilitate consumption and were fed once daily at .125% of body weight. Rumen samples were collected on days 3, 7, 14, and 21 at 0, 1, 2, 4, 6, 8, 12, and 16 hours after feeding blocks. Averaged over time, ruminal ammonia and total volatile fatty acid ...


Effects Of Grazing System On Performance Of Cow-Calf Pairs Grazing Bermudagrass Pastures Interseeded With Wheat And Legumes, Lyle W. Lomas, Joseph L. Moyer, K.P. Coffey, George A. Milliken Jan 2000

Effects Of Grazing System On Performance Of Cow-Calf Pairs Grazing Bermudagrass Pastures Interseeded With Wheat And Legumes, Lyle W. Lomas, Joseph L. Moyer, K.P. Coffey, George A. Milliken

Kansas Agricultural Experiment Station Research Reports

A total of 96 fall-calving cows and 64 calves grazed bermudagrass interseeded with wheat and legumes during 1996, 1997, and 1998 in either a continuous or rotational system stocked at equal rates. Legume cover, available forage dry matter, residual hay production, gains of cows and calves grazing wheat interseeded into bermudagrass, and gains of cows grazing bermudagrass interseeded with legumes were measured. Grazing system had no effect on legume cover, available forage dry matter, gains of cows and calves (wheat phase), and gains of cows (legume phase); however, rotationally grazed pastures produced more residual hay than those grazed continuously.


Integrated Control Of Sericea Lespedeza In Kansas, Walter H. Fick Jan 2000

Integrated Control Of Sericea Lespedeza In Kansas, Walter H. Fick

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted near Maple Hill, KS in 1998 to compare the effectiveness of herbicides and mowing used alone and in combination for control of sericea lespedeza (Lespedeza cuneata). Remedy® at 0.5 lb/acre was more effective when applied during the vegetative growth stage (>87%) than during flowering or seed production. Ally® at 0.4 oz/acre provided control equivalent to Remedy and was equally effective at both the vegetative and bloom stages. Both herbicides provided less than 60% control when applied during seed production. A single mowing on July 8 was not effective. Mowing followed in 6 ...


Effects Of Stage Of Maturity At Harvest And Kernel Processing On The Nutrient Digestibility Of Corn Silage, T.J. Wistuba, L.A. Whitlock, M.K. Siefers, K.K. Bolsen, Ronald V. Pope Jan 2000

Effects Of Stage Of Maturity At Harvest And Kernel Processing On The Nutrient Digestibility Of Corn Silage, T.J. Wistuba, L.A. Whitlock, M.K. Siefers, K.K. Bolsen, Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

Twelve ruminally cannulated crossbred steers were used to evaluate the effects of stage of maturity and kernel processing (rolling) of whole-plant corn silage on nutrient digestibilities. The six silage rations were: 50% milkline, 80% milkline, and 7 days after-black layer (7BL) each ensiled processed (rolled) or unprocessed. Steers consuming the 80% milkline and 7BL processed rations had numerically higher DM and OM digestibilities, and all processed rations had numerically higher starch digestibilities. However, the three processed rations had numerically lower fiber digestibilities (NDF and/or ADF). Steers consuming the 80% milkline rations had numerically higher nutrient digestibilities than those fed ...


Supplementation Strategies For Forage-Fed Beef Steers, R.D. Hunter, T.A. Nutsch, James S. Drouillard, Dale A. Blasi Jan 2000

Supplementation Strategies For Forage-Fed Beef Steers, R.D. Hunter, T.A. Nutsch, James S. Drouillard, Dale A. Blasi

Kansas Agricultural Experiment Station Research Reports

A comparison was made of different supplementation strategies for steer calves wintered on brome hay for 109 days. Treatments consisted of no supplement, 1.33 lb/head daily of a 30% protein range cube, a commercially available free-choice block supplement containing 40% crude protein (19% as non-protein nitrogen), and a soy-based block supplement containing soy solubles and full-fat soybeans with 40% crude protein (25% as nonprotein nitrogen). Following the backgrounding phase, steers were placed onto finishing rations and fed for an additional 152 days before being slaughtered. Gain during the growing phase was greater for all supplemented cattle than for ...


Alfalfa Hay Levels In Limit-Fed, High-Energy, Growing Diets For Beef Steers, Sean P. Montgomery, J.J. Sindt, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, T.A. Nutsch, R.A. Stock, James S. Drouillard Jan 2000

Alfalfa Hay Levels In Limit-Fed, High-Energy, Growing Diets For Beef Steers, Sean P. Montgomery, J.J. Sindt, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, T.A. Nutsch, R.A. Stock, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

One hundred sixty-four crossbred beef steers were used in a 102-day growing study to determine optimum levels of alfalfa hay in limit-fed, high-energy, growing diets. Diets contained steam-flaked corn and 40% Sweet Bran® brand wet corn gluten feed (dry matter basis) with 0, 10, or 20% ground alfalfa hay. A fourth diet containing steam-flaked corn (no Sweet Bran) and 20% ground alfalfa hay was used as a control. Average daily gains and feed efficiencies in the growing phase were greater (P<.05) for cattle fed no alfalfa than for cattle fed the control, 10% alfalfa, or 20% alfalfa diets. Steers fed the control and 20% alfalfa diets had increased rates of dry matter intake (P<.05) compared to those fed no alfalfa. At the end of the growing phase, all cattle were placed on a common finishing diet and fed for 101 days. Dry matter intakes during the finishing phase for cattle previously fed no alfalfa were numerically less than intakes for cattle fed other diets and significantly less than intakes for cattle previously fed the control diet. Feed efficiencies were greater for cattle previously fed 20% alfalfa diets than those fed the control diet (P<.05). Average daily gains did not differ (P>.40) among diets during the finishing phase.


Limiting Amino Acids For Holstein Steers Fed Soybean Hull-Based Diets, R.H. Greenwood, Evan C. Titgemeyer Jan 2000

Limiting Amino Acids For Holstein Steers Fed Soybean Hull-Based Diets, R.H. Greenwood, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

A study was conducted to determine the limiting amino acids for cattle fed soybean hullbased diets. Ruminally cannulated Holstein steers (335 lb) were maintained in metabolism crates, fed the same basal diet (73% soyhulls, 19% alfalfa), and given the same intraruminal infusions (400 g/day acetate to increase energy supply without increasing microbial protein supply). Steers were infused into the abomasum with a complete mixture of the 10 essential amino acids or the mixture with histidine; tryptophan; arginine; phenylalanine; or the three branched-chain amino acids (leucine, isoleucine, and valine) removed. Nitrogen retention was reduced by removal of either histidine or ...


Betaine Supplementation For Finishing Cattle, C.A. Löest, C.M. Coetzer, R.D. Hunter, B.D. Lambert, Evan C. Titgemeyer, James S. Drouillard Jan 2000

Betaine Supplementation For Finishing Cattle, C.A. Löest, C.M. Coetzer, R.D. Hunter, B.D. Lambert, Evan C. Titgemeyer, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Crossbred heifers (756 lb) were used to evaluate the effects of feed-grade betaine on animal performance and carcass characteristics. Heifers had ad libitum access to a finishing diet without betaine or with 4, 8, or 12 g/day of feed-grade betaine top-dressed at feeding. Feed intakes, gains, and feed efficiencies were not significantly altered by feed-grade betaine. Hot carcass weights tended to increase with the betaine supplementation, but dressing percent; percentage of kidney, pelvic and heart fat; fat thickness; or ribeye area were not altered. Yield grades were numerically greater, and marbling scores significantly greater for heifers supplemented with 4 ...


In Vitro Degradation Of Betaine By Ruminal Microbes, C.A. Löest, C.K. Armendariz, Evan C. Titgemeyer Jan 2000

In Vitro Degradation Of Betaine By Ruminal Microbes, C.A. Löest, C.K. Armendariz, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

An in vitro study was conducted to evaluate the degradation of betaine sources by rumen microbes. Five sources of betaine (anhydrous betaine, betaine-HCl, feed-grade betaine, lipidcoated betaine, and concentrated separator byproduct) were incubated in rumen fluid collected from steers fed grain- or forage-based diets. In vitro degradation of betaine was slower with the high roughage diet than the grain diet. Betaine from concentrated separator by-product was degraded most rapidly, but no large differences occurred among the other four sources. The disappearance of betaine from lipid-coated product indicates that it did not resist ruminal degradation. Although betaine from all sources was ...


Effects Of Supplementation Of Limit-Fed Growing Diets With Either Soybean Meal Or Nonenzymatically Browned Soybean Meal On Steer Performance, C.M. Coetzer, C.A. Löest, D.J. Bindel, H. Labrune, R.D. Hunter, T.A. Nutsch, James J. Higgins, James S. Drouillard Jan 2000

Effects Of Supplementation Of Limit-Fed Growing Diets With Either Soybean Meal Or Nonenzymatically Browned Soybean Meal On Steer Performance, C.M. Coetzer, C.A. Löest, D.J. Bindel, H. Labrune, R.D. Hunter, T.A. Nutsch, James J. Higgins, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Seventy two individually fed Angus x Hereford steers (642 lb) were used to evaluate the effects of supplementing limit-fed, growing diets with either soybean meal (SBM) or nonenzymatically browned soybean meal (NSBM). Eight steers were allotted to a control diet composed of 39.1% high-moisture corn, 42% cottonseed hulls, 10.4% ground corn, 5% cane molasses 2.25% urea, and 1.5% vitamins and minerals (dry basis). The remaining steers were allotted to diets that derived 100, 80, 60, or 40% of their supplemental protein from SBM or 60, 45, 30, or 15% of their supplemental protein from NSBN. The ...


Combinations Of Wet Corn Gluten Feed And Steam Flaked Corn In Finishing Cattle Diets, J.J. Sindt, Sean P. Montgomery, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, R.T. Ethington, R.U. Lindquist, James S. Drouillard Jan 2000

Combinations Of Wet Corn Gluten Feed And Steam Flaked Corn In Finishing Cattle Diets, J.J. Sindt, Sean P. Montgomery, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, R.T. Ethington, R.U. Lindquist, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

A 152-day experiment was conducted using 615 crossbred steers to evaluate cattle performance when steam-flaked corn in finishing diets was replaced partially with wet corn gluten feed (CGF). Finishing diets contained no wet CGF (0CGF) or 30 and 60% CGF on a dry matter basis (30CGF and 60CGF). Ruminal and fecal pH increased linearly (P<.01) as the proportion of wet corn gluten feed increased. Cattle fed 60CGF gained less than those fed 30CGF (P<.01) and were less efficient than cattle fed 0CGF or 30CGF (P<.05). Dressing percentage was lower (P<.03) for cattle fed 60CGF compared to cattle fed 30CGF. Incidence of liver abscesses increased linearly (P<.01) as the level of CGF increased. Replacing steamflaked corn with wet CGF at 30% of the diet did not alter performance.


Increasing Levels Of Rumensin® In Limit-Fed, High Energy, Growing Diets For Beef Steers And Effects On Subsequent Finishing Performance, Sean P. Montgomery, J.J. Sindt, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, T.A. Nutsch, James S. Drouillard Jan 2000

Increasing Levels Of Rumensin® In Limit-Fed, High Energy, Growing Diets For Beef Steers And Effects On Subsequent Finishing Performance, Sean P. Montgomery, J.J. Sindt, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, T.A. Nutsch, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

One hundred sixty-four crossbred beef steers were used to determine optimal Rumensin ® concentrations in limit-fed, high-energy, growing diets. Diets contained 30, 40, or 50 grams of Rumensin per ton of dry matter (R30, R40, and R50). Average daily gain and feed efficiency during the growing phase were not different (P>.80) among treatments. Steers that received R50 in the growing phase had the highest average daily gains during the finishing phase (P<.05). This resulted in heavier carcass weights for R50 than R30 (P<.05) and R40 (P<.12). Feed efficiencies during the finishing phase were not different among treatments (P>.40).


Effects Of High-Grain Or High-Roughage Transition Diets On Finishing Performance Of Cattle Previously Fed High-Concentrate Growing Diets, Sean P. Montgomery, J.J. Sindt, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, T.A. Nutsch, James S. Drouillard Jan 2000

Effects Of High-Grain Or High-Roughage Transition Diets On Finishing Performance Of Cattle Previously Fed High-Concentrate Growing Diets, Sean P. Montgomery, J.J. Sindt, T.B. Farran, H.J. Labrune, R.D. Hunter, James J. Higgins, T.A. Nutsch, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Three hundred twenty-eight crossbred beef steers previously fed high-concentrate growing diets had ad libitum access to one of two transition diets prior to initiation of the finishing phase. Transition diets consisted of 58% steam-flaked corn and 30% alfalfa hay or of 23% steamflaked corn and 65% alfalfa hay (DM basis). Average daily gains, dry matter intakes, and feed efficiencies during the transition phase were greater for steers fed the high-grain diet than for steers fed the high-roughage diet (P<.01). This resulted in heavier carcass weights at the end of the subsequent finishing phase for steers fed the high-grain transition diet (P<.05). Average daily gains and feed efficiencies in the finishing phase were not affected by the type of diet fed during the transition phase (P>.20).


Relationship Of Plasma Glucose To Performance And Carcass Traits In Finishing Cattle, H.J. Labrune, D.J. Bindel, C.C. Coetzer, C.A. Löest, R.D. Hunter, James J. Higgins, James S. Drouillard Jan 2000

Relationship Of Plasma Glucose To Performance And Carcass Traits In Finishing Cattle, H.J. Labrune, D.J. Bindel, C.C. Coetzer, C.A. Löest, R.D. Hunter, James J. Higgins, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Blood glucose levels of finishing cattle were measured between 3 and 30 days prior to slaughter and compared to performance and carcass traits. In trial 1, blood samples were obtained from 318 heifers at 2 hours postfeeding at 30 days before slaughter. Plasma glucose levels were correlated positively with fat thickness (P<.01) and kidney, pelvic, and heart fat (P<.02). Trial 2 utilized 72 steers from which blood was collected at 15 hours postfeeding at 3 days before slaughter. Blood glucose was correlated positively with average daily gain (P<.01); dry matter intake (P<.01); hot carcass weight (P<.01); ribeye area (P<.01); fat thickness (P<.06); and kidney, pelvic, and heart fat (P<.01). A third trial was conducted with 77 individually fed steers to determine if blood glucose levels could be used to predict finishing performance and carcass traits. Contrary to trials 1 and 2, plasma glucose did not reflect performance or carcass traits except marbling score (P<.03).


Effects Of Florfenicol Metaphylaxis In Reducing Morbidity And Associated Performance Losses In Stressed Beef Calves, G.L. Huck, Gerald L. Stokka, T.T. Marston, Thomas R. Falkner Jan 2000

Effects Of Florfenicol Metaphylaxis In Reducing Morbidity And Associated Performance Losses In Stressed Beef Calves, G.L. Huck, Gerald L. Stokka, T.T. Marston, Thomas R. Falkner

Kansas Agricultural Experiment Station Research Reports

In February, 1998, 191 crossbred steers (885 lb) were used in a 28-day feeding trial to evaluate the effects of florfenicol (Nuflor®) on morbidity of newly weaned, lightweight cattle. No clinical signs of illness were observed in either the medicated or control group. No statistically significant differences in daily gain, feed intake, or feed efficiency were observed between treated and nontreated cattle.


Effects Of A Clostridial Bacterin-Toxoid Administered Subcutaneously At The Base Of The Ear On Stocker Heifer Performance, Testosterone Serum Concentrations, And Infrared Thermal Characteristics Of The Injection Site And Adjacent Tissues, J.M. Sargeant, M.F. Spire, S.I. Paisley, J. Ernest Minton, Dale A. Blasi Jan 2000

Effects Of A Clostridial Bacterin-Toxoid Administered Subcutaneously At The Base Of The Ear On Stocker Heifer Performance, Testosterone Serum Concentrations, And Infrared Thermal Characteristics Of The Injection Site And Adjacent Tissues, J.M. Sargeant, M.F. Spire, S.I. Paisley, J. Ernest Minton, Dale A. Blasi

Kansas Agricultural Experiment Station Research Reports

A 129-day field study was conducted to evaluate the effects of a clostridial bacterintoxoid administered subcutaneously at the base of the ear on heifer calf performance, surfaceear temperature, and testosterone concentration. Two hundred previously non-implanted heifers averaging 372 lb were assigned to one of four treatments: 1) α-7 (clostridial toxoid) in left neck, Synovex-H in left ear (NL); 2) α-7 in left neck, Synovex-H in right ear (NR); 3) α-7 in right ear, Synovex-H in opposite ear (OP); and 4) α-7 in right ear, Synovex-H in same ear (SM). On day 7, the right ear of each heifer was thermographically ...


Effects Of Sickness On Weight Gain And Radiant Energy Loss In Recently Received Feeder Cattle, M.F. Spire, J.M. Sargeant, James S. Drouillard Jan 2000

Effects Of Sickness On Weight Gain And Radiant Energy Loss In Recently Received Feeder Cattle, M.F. Spire, J.M. Sargeant, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Sickness from undifferentiated respiratory disease in recently received feeder cattle reduced weight gain and altered radiant energy loss. Over a 35-day receiving period, weight gains were reduced 26.3% if an animal was diagnosed as sick once and 48.1% if diagnosed sick more than once. Thermal profiles obtained 10 or more days following clinical illness were cooler than profiles of animals never diagnosed as being sick. Our data suggest that respiratory disease alters metabolic activity as evidenced by reduced weight gain and a detectable decrease in radiant energy loss from the body surface.


Differences In Serum Immunoglobulin G1 And Total Protein Concentrations In Neonatal Calves On Days 1, 5, And 10, L.E. Wankel, T.T. Marston, Gerald L. Stokka, Timothy G. Rozell Jan 2000

Differences In Serum Immunoglobulin G1 And Total Protein Concentrations In Neonatal Calves On Days 1, 5, And 10, L.E. Wankel, T.T. Marston, Gerald L. Stokka, Timothy G. Rozell

Kansas Agricultural Experiment Station Research Reports

Immunoglobulin G1 (IgG1) serum concentrations are used to evaluate passive transfer of immunity in neonatal calves. Total serum proteins also can be measured to evaluate calf health. If IgG1 and total serum protein concentrations change with age, it becomes imperative to compare samples only from a narrow time period. Otherwise, differences might be due to age and not immune status. To help define this time period, blood was drawn from 10 beef calves when they were 1, 5, and 10 days of age. Serum samples were analyzed for IgG1 and total protein concentrations. Total protein concentrations decreased from days 1 ...


Effects Of Dystocia And Confined Calving On Calf-Morbidity Rate From Birth To Weaning, M.W. Sanderson, D.A. Dargatz Jan 2000

Effects Of Dystocia And Confined Calving On Calf-Morbidity Rate From Birth To Weaning, M.W. Sanderson, D.A. Dargatz

Kansas Agricultural Experiment Station Research Reports

An analysis was performed on data from a national survey of US beef cow-calf producers to quantify the effects of management factors on calf-morbidity risk from birth to weaning. The analysis included 2,490 herds from 23 states. A high calf-morbidity herd was defined as one with greater than 10% morbidity. The rate of dystocia in the herd was categorized into five levels. All dystocia levels were associated significantly with increased risk of being a high calf-morbidity herd. Having greater than 70% of cows and heifers calve in confinement also was associated with increased risk of being a high calf-morbidity ...


Characterization Of Serum Hormone Profiles In Growing Heifers Implanted With Anabolic Growth Promotants, D.M. Henricks, Gerry L. Kuhl, M.F. Spire, Dale A. Blasi, James S. Drouillard Jan 2000

Characterization Of Serum Hormone Profiles In Growing Heifers Implanted With Anabolic Growth Promotants, D.M. Henricks, Gerry L. Kuhl, M.F. Spire, Dale A. Blasi, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

A 147-day study was conducted to determine the sequential growth responses and serum hormone profiles of growing heifer calves implanted with anabolic growth promotants. Forty eight previously nonimplanted crossbred beef heifers averaging 396 lb were assigned to one of three treatments: 1) nonimplanted controls (NC), 2) Revalor®-G (REV-G), and 3) Synovex ®-H (SYN-H). Accumulative gain response from day 84 through the end of the trial was significantly faster for both implant treatments than controls. Implant response was not consistent across time; heifers in both implant treatments gained faster than controls (P<.05) during the early (days 22-42) and later (days 64-84 and 85-105) weigh periods. By day 2, serum estradiol concentrations were increased in REV-G (P<.05) and SYN-H (P<.01) heifers relative to NC. Only REV-G contains trenbolone acetate, and none was detected in NC and SYN-H heifers, but serum levels in REV-G heifers were increased on days 2 (P<.001), 4 (P<.05), and 63 (P<.001). Only SYN-H contained testosterone; its level peaked by day 63 in SYN-H heifers. Throughout the study, progesterone was higher in NC heifers than in SYN-H or REV-G heifers, which suggests that the exogenous steroids reduced pituitary gonadotropin secretion and, thus, ovarian progesterone secretion. Our results suggest that the release of trenbolone and estradiol from REV-G implants is complete by 84 days after implanting.


Measuring The Finishing Performance Of Steers And Heifers, Michael R. Langemeier, R. Jones, Gerry L. Kuhl Jan 2000

Measuring The Finishing Performance Of Steers And Heifers, Michael R. Langemeier, R. Jones, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

This study examined improvements in the finishing performance of steers and heifers from 1990 to 1998 by measuring the rate of technological change. The rates of technological change were 0.58% per year for finishing steers and 1.01% per year for finishing heifers. The relatively higher rate for heifers indicates that technological change over the study period favored the performance of heifers.