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2004

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Kansas Agricultural Experiment Station Research Reports

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Full-Text Articles in Life Sciences

Effects Of Increasing Meat And Bone Meal On Finishing-Pig Growth Performance, R O. Gottlob, C W. Hastad, K R. Lawrence, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2004

Effects Of Increasing Meat And Bone Meal On Finishing-Pig Growth Performance, R O. Gottlob, C W. Hastad, K R. Lawrence, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 156 finishing pigs (72 barrows and 84 gilts, initially 110 lb) were used to determine the effects on growth performance of increasing meat and bone meal. Pigs were housed in an environmentally regulated finishing building, with two pigs per pen. There were six pens of barrows and seven pens of gilts per treatment. Pigs were blocked by initial weight and sex, and then allotted to one of six dietary treatments. The dietary treatments were based on corn-soybean meal, were formulated on a true-ileal-digestible (TID) lysine basis, and were fed in three phases. In each phase, diets contained ...


Effect Of Carnichrome® On Growth Performance Of Weanling Pigs In A Commercial Environment, N Z. Frantz, J C. Woodworth, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Michael D. Tokach, Steven S. Dritz Jan 2004

Effect Of Carnichrome® On Growth Performance Of Weanling Pigs In A Commercial Environment, N Z. Frantz, J C. Woodworth, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Michael D. Tokach, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A 43-day growth study with a total of 384 weanling pigs (14 ± 2 d of age) was conducted to evaluate the effects of Carnichrome®, a combination of L-carnitine and chromium picolinate, on growth performance of weanling pigs. Secondary objectives were to compare pigs fed diets with or without a feed-grade medication, evaluate any interactive effects between Carnichrome and medication, and identify any carryover effect once medication was withdrawn from the diet. Experimental diets were arranged in a 2 × 3 factorial to compare the main effects of medication (none or Denagard/CTC, 35/400 g/ton) and Carnichrome (none ...


Grazing Cattle On Winter Cereal Pasture On The Sandy Soils Of South-Central Kansas, Victor L. Martin, R. Hale Jan 2004

Grazing Cattle On Winter Cereal Pasture On The Sandy Soils Of South-Central Kansas, Victor L. Martin, R. Hale

Kansas Agricultural Experiment Station Research Reports

Rye, wheat, and triticale pasture were evaluated during the winters of 2000-01, 2001-02, and 2002-03 for their ability to increase cattle weight from late fall through mid-spring. Large-scale studies were conducted on two 80-acre sites divided into either 25- or 40-acre pastures. Cattle at these sites were stocked at one head per acre, with an average initial weight between 500 and 550 lb. At the Sandyland Experiment Field, small-scale studies were conducted by using the same winter cereals for forage, but at greater stocking rates, ranging from two to three head per acre. Supplemental feeding, as necessary, included summer annual ...


Responses Of Lactating Holstein Cows To Low-Pressure Soaking Or High-Pressure Misting During Heat Stress, Joseph P. Harner, John F. Smith, W.F. Miller, B. Cvetkovic Jan 2004

Responses Of Lactating Holstein Cows To Low-Pressure Soaking Or High-Pressure Misting During Heat Stress, Joseph P. Harner, John F. Smith, W.F. Miller, B. Cvetkovic

Kansas Agricultural Experiment Station Research Reports

Lactating dairy cattle were used to evaluate three different cooling systems. Eight cows were arranged in a replicated Latinsquare design and assigned to each of four treatments. Treatments were control, lowpressure soaking (LPS), high-pressure misting with 1.7 gallons per minute of water (HP-1.7), or high-pressure misting with 3.4 gallons per minute of water (HP-3.4). Cows were allowed to become heat stressed in a free-stall facility, and then were moved to a tie-stall barn for 2 hours of observations during four hot and humid afternoons. Respiration rates declined when heat abatement systems were used. Respiration rates at ...


Accelerated Growth Programs For Dairy Calves, Michael J. Brouk Jan 2004

Accelerated Growth Programs For Dairy Calves, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

Accelerated-growth feeding programs are the newest buzz word in calf rearing. Accelerated programs require a milk replacer containing more crude protein and less fat content than traditional milk replacers. These programs are generally phase-feeding programs that increase the amount of milk replacer as the calf advances in age. In addition, changes in the calf starter are necessary to achieve optimal performance. These programs increase weight gain during the liquid-feeding period and may positively impact calf health. Changes in the composition and amount of milk replacer used increase the cost of the accelerated program, compared with that of conventional programs. Gains ...


Impact Of Dried Seaweed Meal On Heat-Stressed Lactating Dairy Cattle, B. Cvetkovic, John E. Shirley, Michael J. Brouk Jan 2004

Impact Of Dried Seaweed Meal On Heat-Stressed Lactating Dairy Cattle, B. Cvetkovic, John E. Shirley, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

Twenty-four lactating Holstein cows were used to determine the production response to the inclusion of brown seaweed in the basal diet during summer heat stress. Cows were blocked by lactation number, days in milk, and energy-corrected milk and then allotted to either a control or control + brown seaweed diet. Cattle on the brown seaweed diet were fed 4 ounces per cow per day for 7 days , and then 2 ounces per cow per day for 14 days, before the start of the experiment. All cattle were housed in a tie-stall barn, fed individually, and milked twice daily. Cows fed brown ...


Comparison Of Heart Girth Or Flank-To-Flank Measurements For Predicting Sow Weight, T Iwasawa, M G. Young, T P. Keegan, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2004

Comparison Of Heart Girth Or Flank-To-Flank Measurements For Predicting Sow Weight, T Iwasawa, M G. Young, T P. Keegan, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

In previous Swine Day Reports we have demonstrated that feeding sows in gestation on the basis of body weight and backfat thickness is more precise and economical than methods of feeding based on visual observation of body-condition score. To simplify the weight and backfat procedure, we have estimated sow weight based on the correlation between heart girth (circumference of the sow measured behind the front legs) and weight. The objective of this study was to determine if a different sow measurement, flank to flank, would be as accurate as the heart-girth measurement. Sows were weighed and measured behind the front ...


Effects Of Salt Particle Size And Sample Preparation On Results Of Mixer-Efficiency Testing, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2004

Effects Of Salt Particle Size And Sample Preparation On Results Of Mixer-Efficiency Testing, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to evaluate the effects of using salt with different particle sizes and of using different samplepreparation methods on mixer-efficiency testing (time required to achieve a coefficient of variation (CV) of 10% or less among 10 feed samples). A 3000-lb capacity horizontal ribbon mixer was used to mix batches of feed. Ten samples were collected at eight times during mixing (0.0, 0.5, 1.0, 2.0, 3.5, 5.5, 8.0, and 10.5 min) after all ingredients were added from pre-determined locations in the mixer. Coefficient of variation was used to measure mixer ...


The Effects Of Different Feed-Grade Antibiotics On Growth Performance Of Weanling Pigs In A Research Environment, R O. Gottlob, C W. Hastad, C N. Groesbeck, K R. Lawrence, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2004

The Effects Of Different Feed-Grade Antibiotics On Growth Performance Of Weanling Pigs In A Research Environment, R O. Gottlob, C W. Hastad, C N. Groesbeck, K R. Lawrence, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 168 weanling pigs (initially 13.8 lb and 21 ± 3 d of age, PIC) were used to determine the effects of different feed-grade antibiotics on nursery-pig performance. Pigs were fed one of four experimental diets: control with no antibiotics; or the control diet with added Denagard/CTC (35 g/ton Denagard™, 400 g/ton Chlortetracycline); Neo-Terramycin® (140 g/ton Neomycin Sulfate, 140 g/ton Oxytetracycline HCl); or Mecadox® (Carbadox, 50 g/ton). Overall (d 0 to 28 after weaning), pigs fed diets containing Denagard/ CTC or Neo-Terramycin® had greater ADG and ADFI (P<0.05) than did pigs fed all other diets, and had improved F/G (P<0.05), compared with that of pigs fed the control diet. Also, pigs fed diets containing Mecadox® had improved ADG and F/G (P<0.05) compared with those of pigs fed the control diet. The addition of feed-grade antibiotics in swine diets resulted in improved growth performance, and pigs fed Denagard/CTC or Neo-Terramycin® had the greatest improvement in growth performance.; Swine Day, 2004, Kansas State University, Manhattan, KS, 2004


Determining The Optimal Lysine To Calorie Ratio For Growth Performance Of 20- To 50-Lb Genetiporc Nursery Pigs, J D. Schneider, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2004

Determining The Optimal Lysine To Calorie Ratio For Growth Performance Of 20- To 50-Lb Genetiporc Nursery Pigs, J D. Schneider, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to evaluate the effects of increasing dietary lysine and energy density on nursery-pig performance. Exp. 1 was organized as a combination of two simultaneous experiments, with one set of diets consisting of five treatments with increasing TID lysine (0.99, 1.07, 1.14, 1.22, and 1.30%) concentrations, and the second set of diets consisting of five treatments with increasing energy density (1342, 1406, 1471, 1535, and 1600 kcal/lb). The highest l of both lysine and energy density (1.30% and 1600 kcal/lb, respectively) were combined as one diet and used in ...


Effects Of Increasing Dried Distiller’S Grains On Feed Intake, C W. Hastad, N Z. Frantz, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Steven S. Dritz Jan 2004

Effects Of Increasing Dried Distiller’S Grains On Feed Intake, C W. Hastad, N Z. Frantz, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Recent studies have shown that dried distiller’s grains with solubles (DDGS) has an ME value similar to that of corn, but pigs fed diets with DDGS have a lesser feed intake than do those fed corn. We conducted three studies to evaluate the effects of DDGS on palatability and feed intake of growing pigs. In Exp. 1, 90 gilts (initially 58.2 lb) were used to evaluate the effects of a diet based on cornsoybean meal, alone or with 30% DDGS from two different sources, on feed preference. Source 1 DDGS was obtained from an ethanol plant built before ...


Influence Of Chromium Source On Plasma Non-Esterified Fatty Acid Concentrations In Growing-Finishing Pigs, C N. Groesbeck, K R. Lawrence, F Valdez, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2004

Influence Of Chromium Source On Plasma Non-Esterified Fatty Acid Concentrations In Growing-Finishing Pigs, C N. Groesbeck, K R. Lawrence, F Valdez, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 150 pigs (PIC, initial body weight 178.9 ± 14.7 lb) were used in a 35-d study to evaluate the effect of chromium propionate and chromium tripicolinate on plasma non-esterifed fatty acids (NEFA) in growing-finishing pigs. Our objective was to determine if differences between sources and rate of source being fed can be detected in fasted growing-finishing pigs by measuring plasma NEFA. Pigs were randomly allotted to one of the five dietary treatments arranged as a 2 × 2 factorial plus negative control (no chromium). Main effects were source of chromium (chromium propionate and chromium tripicolinate ...


Evaluating Oregano Oil As A Growth Enhancer In Nursery Pig Diets, C R. Neill, C N. Groesbeck, K R. Lawrence, C W. Hastad, R O. Gottlob, B M. Hildabrand, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2004

Evaluating Oregano Oil As A Growth Enhancer In Nursery Pig Diets, C R. Neill, C N. Groesbeck, K R. Lawrence, C W. Hastad, R O. Gottlob, B M. Hildabrand, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 224 nursery pigs (PIC L 327L × C22) initially 12.9 ± 3.0 lb and 21 d of age were used in a 28-d feeding trial. The objective of our study was to evaluate the effects of oregano oil, with or without an in-feed antimicrobial. Oregano oil is a plant extract derived from the Greek herb, Origanum vulgare. It has been speculated to have antimicrobial-like activity. There were four dietary treatments in a 2 × 2 factorial. Diets consisted of a negative control (without an antibiotic or oregano oil), the control diet plus neomycin/oxytetracycline (140 ...


2004 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 2004

2004 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.


Field Research 2003, Dale L. Fjell Jan 2004

Field Research 2003, Dale L. Fjell

Kansas Agricultural Experiment Station Research Reports

No abstract provided.


Inseminations At Estrus Induced By The Presynch Protocol Before Timed Artification Insemination, A.P. Phatak, Jeffrey S. Stevenson Jan 2004

Inseminations At Estrus Induced By The Presynch Protocol Before Timed Artification Insemination, A.P. Phatak, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

A controlled field study examined conception rates after two timed-AI (TAI) breeding protocols conducted on two commercial dairy farms. Estrous cycles in postpartum lactating cows were presynchronized with two injections of PGF2" given 14 days apart (Presynch) and then, after 12 days, the standard Ovsynch protocol (injection of GnRH 7 days before and 48 h after an injection of PGF2", with one TAI at 12 to 16 hours after the second GnRH injection) or Heatsynch protocol (injection of GnRH 7 days before an injection of PGF2", followed 24 h later by 1 mg of estradiol cypionate (ECP) and one TAI ...


Evaluation Of The Optimal True-Ileal-Digestible Lysine And Threonine Requirement For Nursery Pigs, N A. Lenehan, J L. Usry, C W. Hastad, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2004

Evaluation Of The Optimal True-Ileal-Digestible Lysine And Threonine Requirement For Nursery Pigs, N A. Lenehan, J L. Usry, C W. Hastad, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1800 pigs (Exp 1, 360; Exp. 2, 1440) were used in two experiments to evaluate the true ileal digestible (TID) lysine and threonine requirement for 24- to 44-lb pigs. In Exp. 1, there were eight pens per treatment, with five pigs (Genetiporc, initially 23.6 lb and 34 d of age) per pen. Experiment 1 was conducted as a combination of two separate trials to simultaneously examine both the TID lysine and threonine requirement, and hence, determine the appropriate threonine-to-lysine ratio. The first part of the trial consisted of five treatments formulated to contain 0.9, 1 ...


Short-Term Progestin Estrus Synchronization With Timed Insemination For Beef Heifers: Cidr Vs. Mga, A.W. Thompson, D.R. Eborn, L.D. Keenan, David M. Grieger Jan 2004

Short-Term Progestin Estrus Synchronization With Timed Insemination For Beef Heifers: Cidr Vs. Mga, A.W. Thompson, D.R. Eborn, L.D. Keenan, David M. Grieger

Kansas Agricultural Experiment Station Research Reports

Recently, a new product, Eazi-Breed CIDR (a vaginal insert containing progesterone), was approved for estrus synchronization in beef heifers. In previous studies the CIDR has produced excellent estrus synchrony, but it is more costly than the commonly used progestin, melengestrol acetate (MGA). Therefore, the objective of this study was to compare the CIDR to MGA in a shorter-term timed breeding program. Seventy-seven commercial beef replacement heifers were assigned to one of two treatments, CIDR (n=38) or MGA (n=39). Each heifer in the CIDR treatment group received a CIDR on day 1, which was removed on day 7. The ...


Update On Bovine Spongiform Encephalopathy, Larry C. Hollis Jan 2004

Update On Bovine Spongiform Encephalopathy, Larry C. Hollis

Kansas Agricultural Experiment Station Research Reports

Bovine Spongiform Encephalopathy, commonly called "mad cow disease" by members of the media, found its way into the United States and was diagnosed in December, 2003, in a Holstein dairy cow of Canadian origin. A significant disruption to the beef cattle industry immediately followed the announcement of this finding; within a matter of weeks, however, a degree of normalcy began to return to the industry. When consumers and cattle producers alike learned of the extensive firewall system that had been put in place years earlier by the USDA and the FDA to reduce the likelihood of entry of this disease ...


Changes In Breeding Soundness Evaluation During A Breeding Season, A.W. Thompson, T.T. Marston, M. Sanderson, P. Chenoweth Jan 2004

Changes In Breeding Soundness Evaluation During A Breeding Season, A.W. Thompson, T.T. Marston, M. Sanderson, P. Chenoweth

Kansas Agricultural Experiment Station Research Reports

Breeding-soundness evaluations are a common tool in the beef industry to test a bull's potential fertility. These evaluations place a bull into one of three categories: satisfactory, unsatisfactory, or deferred. These categories only refer to the bull at a specific time, and his status can and will change over time. The purpose of this report is to explain and demonstrate the changes in a bull's breeding- soundness evaluations during a breeding season.


Evaluation Of Nitrogen Availability In Liquid Feedstuffs, E.A. Elwakeel, Evan C. Titgemeyer, James S. Drouillard Jan 2004

Evaluation Of Nitrogen Availability In Liquid Feedstuffs, E.A. Elwakeel, Evan C. Titgemeyer, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

We developed an in vitro assay to assess ruminal availability of protein in liquid feeds containing soluble protein/nitrogen. Microbial mass accumulating as a result of assimilation of dietary nitrogen by ruminal microbes during an in vitro fermentation is measured. In the assay, microbial growth is most limited by the availability of protein/nitrogen, so microbial mass is proportional to the amount of available nitrogen in the sample. In liquid feeds that we generated in the laboratory, ruminal nitrogen availability decreased in response to mild heating, and the decline was greater for feedstuffs containing true protein rather than urea. Addition ...


Plasma Metabolites Of Receiving Heifers And The Relationship Between Bovine Respiratory Disease, Weight Gain, And Carcass Characteristics, Sean P. Montgomery, J.J. Sindt, M.A. Greenquist, W.F. Miller, J.N. Pike, E.J. Good, E.R. Loe, M.J. Sulpizio, T.J. Kessen, James S. Drouillard Jan 2004

Plasma Metabolites Of Receiving Heifers And The Relationship Between Bovine Respiratory Disease, Weight Gain, And Carcass Characteristics, Sean P. Montgomery, J.J. Sindt, M.A. Greenquist, W.F. Miller, J.N. Pike, E.J. Good, E.R. Loe, M.J. Sulpizio, T.J. Kessen, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Six hundred sixty-five crossbred beef heifers initially weighing 495 lb were used to evaluate rectal temperature and plasma glucose, lactate, and urea nitrogen at initial processing as indicators of health status of newly arrived receiving cattle. We also evaluated the relationship between bovine respiratory disease (BRD), weight gain, and carcass characteristics. An increased number of treatments for BRD was associated with lower (linear, P<0.01) plasma glucose and lactate concentrations at initial processing. Elevated rectal temperatures at initial processing were associated with a greater number of treatments for BRD (linear, P<0.03). Initial body weight, final body weight, and average daily gain during the receiving period were progressively less (linear, P<0.01) as the number of treatments for BRD increased, whereas grazing-period gain was progressively greater with more frequent treatment for BRD during the receiving period (linear, P<0.01). Finishing-period gain, final body weight, hot carcass weight, fat thickness, and marbling score were linearly decreased (P<0.05) with increased treatmentfor BRD during the receiving period. These data suggest that initial plasma glucose and lactate concentrations might be associated with the health of newly arrived receiving cattle and that increased incidence of BRD in cattle is associated with lower weight gain and carcass quality.


Effects Of Route Of Administration Of A Commercially Available Mannheimia (Pasteurella) Haemolytica Vaccine On Titer Levels, T.T. Marston, Donald A. Llewellyn, Gerald L. Stokka, Larry C. Hollis Jan 2004

Effects Of Route Of Administration Of A Commercially Available Mannheimia (Pasteurella) Haemolytica Vaccine On Titer Levels, T.T. Marston, Donald A. Llewellyn, Gerald L. Stokka, Larry C. Hollis

Kansas Agricultural Experiment Station Research Reports

One hundred thirteen Hereford x Angus heifer calves (average weight = 515 lb) were allotted to one of three treatments: 1) control, no vaccine; 2) a 2-cc subcutaneous injection of One-Shot® (Pfizer Animal Health), a Mannheimia (pasteurella) haemolytica vaccine, three weeks before weaning; or 3) a ½-cc intradermal injection of One-Shot, three weeks before weaning. All heifers were weighed and blood samples harvested at time of injection, three weeks later at weaning, and then 28 days later. After weaning, heifers were confined to a common pen and fed free-choice brome hay and approximately 5 lb/head daily of a concentrate. Blood ...


Failure To Eliminate The Carrier State Of Anaplasma Marginale By Using Long-Acting Injectable Oxytetracycline, D. Gnad, T. Marston, Donald A. Llewellyn, G. Palmer, Larry C. Hollis Jan 2004

Failure To Eliminate The Carrier State Of Anaplasma Marginale By Using Long-Acting Injectable Oxytetracycline, D. Gnad, T. Marston, Donald A. Llewellyn, G. Palmer, Larry C. Hollis

Kansas Agricultural Experiment Station Research Reports

Thirty-four Anaplasma marginale seropositive cows from a herd of 236 were allocated to treatments: 5 animals served as untreated controls, and 29 animals were treated with three injections of long-acting oxytetracycline at three-day intervals. Fourteen days after initiation of treatment, 100% of control cows and 89% of treated cows were found to have Anaplasma marginale present. Seventyfour days after initiation of treatment, 100% of control cows and 86% of treated cows were found to have Anaplasma marginale present. Use of injectable long-acting oxytetracycline was not effective in eliminating the carrier state of Anaplasma marginale from infected animals.


Estrus Synchronization Of Replacement Beef Heifers By Using Gnrh, Prostaglandin F2Α (Pgf), And Progesterone (Cidr): A Multi-Location Study, J.E. Larson, G.C. Lamb, T.W. Geary, Jeffrey S. Stevenson, Sandra K. Johnson, M.L. Day, D.J. Kesler, J.M. Dejarnette, D.G. Landblom, D. Whittier Jan 2004

Estrus Synchronization Of Replacement Beef Heifers By Using Gnrh, Prostaglandin F2Α (Pgf), And Progesterone (Cidr): A Multi-Location Study, J.E. Larson, G.C. Lamb, T.W. Geary, Jeffrey S. Stevenson, Sandra K. Johnson, M.L. Day, D.J. Kesler, J.M. Dejarnette, D.G. Landblom, D. Whittier

Kansas Agricultural Experiment Station Research Reports

Our objectives were to determine whether a fixed-timed artificial insemination (TAI) protocol could yield similar fertility rates to a protocol requiring detection of estrus and whether an injection of gonadotropin hormone-releasing hormone (GnRH) at CIDR (vaginal insert containing progesterone) insertion enhances pregnancy rates. Replacement beef heifers (n=2,077) from 12 locations were assigned randomly to each of four estrussynchronization protocols. All heifers received a CIDR for 7 days, and an injection of prostaglandin F2α(PGF) on the day of CIDR removal. For treatment EAI, heifers were observed for estrus for 84 hours after PGF administration and were inseminated 6 ...


Comparison Of Bovine Transfer Factor And Micotil®: Effects On Health And Performance Of Receiving Heifers, Sean P. Montgomery, M.A. Greenquist, J.J. Sindt, W.F. Miller, J.N. Pike, E.J. Good, E.R. Loe, M.J. Sulpizio, T.J. Kessen, James S. Drouillard Jan 2004

Comparison Of Bovine Transfer Factor And Micotil®: Effects On Health And Performance Of Receiving Heifers, Sean P. Montgomery, M.A. Greenquist, J.J. Sindt, W.F. Miller, J.N. Pike, E.J. Good, E.R. Loe, M.J. Sulpizio, T.J. Kessen, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Transfer factors are antigen-specific products of T lymphocytes that are capable of transferring delayed-type hypersensitivity and cell-mediated immunity. We evaluated bovine transfer factor (TF) for use in receiving cattle. Crossbred beef heifers (n = 665) initially weighing 495 lb were used to determine the effects of TF on the health and performance of beef cattle during a 36-day receiving period. Heifers were processed within 24 hours after arrival. Treatments were subcutaneous injection with 1.5 ml of Micotil®/100 lb of body weight or oral administration of 700 mg of TF isolated from bovine colostrum. Heifers given TF during initial processing ...


Growth Performance And Carcass Characteristics Of Finishing Beef Steers Implanted With Component Te-S Or Component Te-S With Tylan, B. Dicke, G.E. Erickson, T.J. Klopfenstein, R.T. Botts, P.T. Anderson, Brandon E. Depenbusch, James S. Drouillard Jan 2004

Growth Performance And Carcass Characteristics Of Finishing Beef Steers Implanted With Component Te-S Or Component Te-S With Tylan, B. Dicke, G.E. Erickson, T.J. Klopfenstein, R.T. Botts, P.T. Anderson, Brandon E. Depenbusch, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Component TE-S and Component TE-S with Tylan growth-promoting implants were compared in an experiment conducted at a commercial feedlot operation (Ward Feed Yard; Larned, Kansas) to evaluate effects on growth performance and carcass characteristics. Crossbred steers (n=1843; 827 lb body weight) were implanted with either Component TE-S or Component TE-S with Tylan and were fed a finishing ration based on steam-flaked corn for an average of 116 days before slaughter. Cattle were assigned randomly to the implant treatments at processing and were allotted to 12 pens, containing an average of 154 steers each. No differences were detected in dry ...


Feedlot Performance And Carcass Traits Of Serially Slaughtered Finishing Heifers, R.L. Hale, G.L. Bishop, J.R. Brethour, T.T. Marston Jan 2004

Feedlot Performance And Carcass Traits Of Serially Slaughtered Finishing Heifers, R.L. Hale, G.L. Bishop, J.R. Brethour, T.T. Marston

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted at the KSU Agricultural Research Southeast Agricultural Research Center Center, Hays, Kansas, to measure feedlot gain and carcass traits of serially slaughtered, yearling crossbred heifers. In Exp. 1, 159 heifers averaging 792 lbs were randomly assigned to one of four slaughter groups, and slaughtered at 21-day intervals beginning at 92 days on feed. In Exp. 2, 181 heifers averaging 759 lbs were randomly assigned to one of four slaughter groups, and slaughtered at intervals of 19, 23 and 21 day, respectively, starting at 127 days. In both experiments, final weight, gain, and carcass weight increased with ...


Effect Of Corn Endosperm Type And Corn Containing The Cry1f Protein On Performance Of Beef Heifers Fed Finishing Diets Based On Steam-Flaked Corn, J.J. Sindt, E.R. Loe, T.J. Kessen, M.J. Sulpizio, Sean P. Montgomery, F.N. Owens, James S. Drouillard Jan 2004

Effect Of Corn Endosperm Type And Corn Containing The Cry1f Protein On Performance Of Beef Heifers Fed Finishing Diets Based On Steam-Flaked Corn, J.J. Sindt, E.R. Loe, T.J. Kessen, M.J. Sulpizio, Sean P. Montgomery, F.N. Owens, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Eighty beef heifers (initial body weight = 795 ± 18 lb) were individually fed finishing diets based on steam-flaked corn for 118 days. Dietary treatments consisted of corn hybrids containing vitreous (HARD), opaque (SOFT), or intermediate (INT) types of corn endosperm. Within the HARD endosperm type, a transgenic hybrid (HARD-GMO) containing the Herculex I Cry1F protein was compared with its nontransgenic, conventional (HARDCONV) counterpart. Dry matter intake, average daily gain, and gain efficiencies were similar among treatments. Likewise, hot carcass weight, dressing percentage, and ribeye area were unaffected by dietary treatment. Heifers fed HARD-CONV were fatter than heifers fed HARD-GMO, having fewer ...


Night Feeding To Reduce Bird Predation In Feedlots, M.A. Greenquist, J.J. Sindt, T.J. Kessen, E.R. Loe, Sean P. Montgomery, M.J. Sulpizio, James S. Drouillard, Charles D. Lee Jan 2004

Night Feeding To Reduce Bird Predation In Feedlots, M.A. Greenquist, J.J. Sindt, T.J. Kessen, E.R. Loe, Sean P. Montgomery, M.J. Sulpizio, James S. Drouillard, Charles D. Lee

Kansas Agricultural Experiment Station Research Reports

During times of heavy infestations by birds, feedlots can have 25 to 30% increases in feed usage, thereby resulting in large economic losses. Because starlings, blackbirds, grackles, and other avian pests normally feed during daylight hours, we hypothesized that feeding cattle at night would minimize feed contamination and feed loss due to bird infestation. Crossbred beef heifers (n=96; 770 lb) were used to evaluate the effects of feeding at night on performance and carcass characteristics. Heifers were fed for 107 days during the months of November to March, when large bird populations were observed. Feed was delivered once daily ...