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2010

Kansas Agricultural Experiment Station Research Reports

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Director's Report Of Research In Kansas 2009, Kansas State University. Agricultural Experiment Station Jan 2010

Director's Report Of Research In Kansas 2009, Kansas State University. Agricultural Experiment Station

Kansas Agricultural Experiment Station Research Reports

This report contains the title, author, and publication information for manuscripts published by station scientists.


Southwest Research-Extension Center Field Day 2010 Jan 2010

Southwest Research-Extension Center Field Day 2010

Kansas Agricultural Experiment Station Research Reports

Each Field Day report consists of individual research reports on topics specific to the region, including cultural methods for most of the major crops grown in Kansas, mitigating the effects of weeds, insects, and disease associated with those crops, and irrigation. Research is conducted and reports written by staff of the K-State Research and Extension Southwest Research Extension Center.


Kansas Fertilizer Research 2009, Dorivar Ruiz Diaz Jan 2010

Kansas Fertilizer Research 2009, Dorivar Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

No abstract provided.


Field Research 2010, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 2010

Field Research 2010, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

Includes research reports from these locations: East Central Kansas Experiment Field, Kansas River Valley Experiment Field, South Central Kansas Experiment Field, and Western Kansas Agricultural Research Centers.


2010 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 2010

2010 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.


Comparison Of Medicinal Feed Additives On Health And Growth Performance Of Beef Calves Grazing Native Grass Pasture, M.P. Epp, B. Greenwood, Dale A. Blasi Jan 2010

Comparison Of Medicinal Feed Additives On Health And Growth Performance Of Beef Calves Grazing Native Grass Pasture, M.P. Epp, B. Greenwood, Dale A. Blasi

Kansas Agricultural Experiment Station Research Reports

Optimizing growth rate is an important contributor to overall profitability for stocker cattle grazing native Flint Hills pasture. Disease challenges from pinkeye and foot rot have traditionally been problems that compromise health and productivity of stocker cattle in this grazing region. Use of medicinal feed additives as a part of a supplementation program may prevent health problems and improve overall productivity during a spring/summer grazing season.


Length Of Weaning Period But Not Timing Of Vaccination Affects Feedlot Receiving Performance And Health Of Fall-Weaned, Ranch-Direct Beef Calves, M.J. Macek, J.W. Iliff, Todd W. Schmidt, L.A. Pacheco, K. C. Olson, John R. Jaeger, Daniel U. Thomson Jan 2010

Length Of Weaning Period But Not Timing Of Vaccination Affects Feedlot Receiving Performance And Health Of Fall-Weaned, Ranch-Direct Beef Calves, M.J. Macek, J.W. Iliff, Todd W. Schmidt, L.A. Pacheco, K. C. Olson, John R. Jaeger, Daniel U. Thomson

Kansas Agricultural Experiment Station Research Reports

Weaning and preconditioning programs are thought to be crucial to calf health and performance during the finishing period. The stress of maternal separation, changes in diet, environmental changes, and exposure to unfamiliar pathogens increase susceptibility of recently weaned calves to bovine respiratory disease. Vaccination programs are implemented near weaning to decrease the incidence of respiratory disease. Many vaccination strategies are practiced by cow-calf producers in the United States. The most cautious strategy involves vaccination against respiratory disease pathogens 2 to 4 weeks before maternal separation followed by a booster at weaning. This strategy is used in instances in which time, …


Round Bale Alfalfa Processing Method Does Not Influence Feeding Or Mixing Characteristics In A Total Mixed Ration, S.Q. Jones, T.T. Marston, T.J. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner Jan 2010

Round Bale Alfalfa Processing Method Does Not Influence Feeding Or Mixing Characteristics In A Total Mixed Ration, S.Q. Jones, T.T. Marston, T.J. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner

Kansas Agricultural Experiment Station Research Reports

Nutritionists and producers often assume that ingredients in a total mixed ration are uniformly mixed. However, many factors may affect ration homogeneity, including particle size, shape, and density and mixer discharge location. Forages are often ground prior to mixing in a total mixed ration to reduce variation in forage particle length. However, preprocessing forages while baling may facilitate particle length reduction and eliminate the need to grind forages prior to mixing. Objectives of this study were to determine the effects of forage processing method on uniformity and particle length of the total mixed ration at different discharge locations throughout mixing.


Precutting Round Alfalfa And Cornstalk Bales Decreases Time And Fuel Required For Bale Breakup In A Vertical Mixer, S.Q. Jones, T.T. Marston, R.M. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner Jan 2010

Precutting Round Alfalfa And Cornstalk Bales Decreases Time And Fuel Required For Bale Breakup In A Vertical Mixer, S.Q. Jones, T.T. Marston, R.M. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner

Kansas Agricultural Experiment Station Research Reports

Properly mixing and distributing nutrients throughout a ration can be equally as important as including them in the formulation. Many factors, including forage type, particle length, and mixer type, affect the homogeneity of total mixed rations. Particle size plays an important role in digestion and animal performance and, therefore, is an important consideration from harvest through feeding. An increase in particle size results in a less uniform distribution of nutrients throughout the total mixed ration. Typically, diets with a high proportion of forages have the lowest uniformity of nutrients in individual batches of complete feed.


Initial Heifer Body Composition Has Little Impact On Response To Zilmax, L.K. Thompson, C. Schneider, G. Parsons, K. Miller, Christopher D. Reinhardt, James S. Drouillard Jan 2010

Initial Heifer Body Composition Has Little Impact On Response To Zilmax, L.K. Thompson, C. Schneider, G. Parsons, K. Miller, Christopher D. Reinhardt, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Using a growth promotant at the correct time of finishing is critical for maximizing profit potential. Previous studies have shown that zilpaterol-HCl (Zilmax; Intervet/ Schering-Plough Animal Health, Millsboro, DE) improves carcass characteristics. The objective of this study was to determine effects of prior body composition on subsequent changes in carcass weight, fatness, and muscle in heifers fed Zilmax so producers can introduce Zilmax at the level of finish that will result in the most desirable response. We hypothesized that fatter heifers use fat as the fuel for muscle growth.


Round Bale Alfalfa Processing Method Affects Heifer Growth But Does Not Influence Wastage Or Eating Preference, S.Q. Jones, T.T. Marston, T.J. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner Jan 2010

Round Bale Alfalfa Processing Method Affects Heifer Growth But Does Not Influence Wastage Or Eating Preference, S.Q. Jones, T.T. Marston, T.J. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner

Kansas Agricultural Experiment Station Research Reports

Many factors affect forage quality, including moisture level at baling, compaction, bulk density, and maturity at harvest. Losses of dry matter and nutrient value occur during field curing. Hay baled at or above 18% moisture should have less nutrient loss in the field. However, hay baled at these moisture levels has the potential to heat during storage, causing dry matter loss and nutrient degradation. Also, as particle length of forage decreases, packing ability of forage and bulk density of bales increase. Although particle length is reduced by grinding baled forage, this can result in nutrient losses. Also, when cattle are …


Effect Of Nitrogen Supplementation And Zilpaterol-Hcl On Urea Recycling In Steers Consuming Corn-Based Diets, D.W. Brake, M.L. Jones, Evan C. Titgemeyer Jan 2010

Effect Of Nitrogen Supplementation And Zilpaterol-Hcl On Urea Recycling In Steers Consuming Corn-Based Diets, D.W. Brake, M.L. Jones, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Cattle have the innate ability to recycle nitrogen absorbed post-ruminally back to the rumen as endogenously synthesized urea. Urea returning to the rumen provides an additional opportunity for ruminal microbes to benefit from nitrogen absorbed postruminally. Urea recycling may provide a significant benefit to cattle when protein requirements of ruminal microbes are high or when large amounts of the dietary protein escape ruminal degradation.


High Sulfur Content In Distillers Grains Alters Ruminal Fermentation And Diet Digestibility In Beef Steers, S. Uwituze, G.L. Parsons, K.K. Karges, M.L. Gibson, Larry C. Hollis, James S. Drouillard Jan 2010

High Sulfur Content In Distillers Grains Alters Ruminal Fermentation And Diet Digestibility In Beef Steers, S. Uwituze, G.L. Parsons, K.K. Karges, M.L. Gibson, Larry C. Hollis, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Requirements for elemental sulfur in feedlot diets have been established to be approximately 0.15% with a maximum upper threshold of 0.40% of diet dry matter. Feeding ethanol fermentation by-products, such as distillers grains with solubles, that are high in sulfur can result in dietary sulfur levels that exceed the recommended maximum. Previous studies indicated that dietary sulfur influenced the site and extent of fiber and protein digestion. The objective of this study was to evaluate ruminal fermentation characteristics and diet digestibility when 30% (dry matter basis) dried distillers grains with solubles with various levels of sulfur was incorporated into finishing …


Capacity Of The Bovine Intestinal Mucus And Its Components To Support Escherichia Coli O157:H7 Growth, C. Aperce, J. Heidenreich, James S. Drouillard Jan 2010

Capacity Of The Bovine Intestinal Mucus And Its Components To Support Escherichia Coli O157:H7 Growth, C. Aperce, J. Heidenreich, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Escherichia coli O157:H7 contamination of human food products is a major concern for the beef industry. The pathogens responsible for outbreaks often originate from cattle, and E. coli O157:H7 can thrive in healthy cattle. To control contamination in the food chain, it is essential to understand how this pathogen is able to grow and compete with other bacteria in the gastrointestinal tracts of cattle. Previous studies have shown that bovine intestinal mucus supports bacterial colonization and can selectively influence makeup of the bacterial population. Intestinal mucus is made of mucins, which are gel-forming glycoproteins. Mucin molecules contain sialic acid that …


Cornstalk Round Bale Processing Method Does Not Influence Feeding Characteristics Or Feed Refusals, S.Q. Jones, T.T. Marston, T.J. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner Jan 2010

Cornstalk Round Bale Processing Method Does Not Influence Feeding Characteristics Or Feed Refusals, S.Q. Jones, T.T. Marston, T.J. Kraus, Joel M. Derouchey, Justin W. Waggoner, Ryan M. Breiner

Kansas Agricultural Experiment Station Research Reports

Nutritionists and producers often assume that ingredients in a total mixed ration are uniformly mixed. However, many factors can affect ration homogeneity, including particle size, particle shape, differences in density of feed ingredients, and relative point at which the mixture is discharged from a mixer batch. Forages often are ground prior to mixing in a total mixed ration to reduce variation in forage particle length. Preprocessing forages during baling may facilitate particle length reduction, eliminating the need to grind forages prior to mixing. The objectives of this study were to determine the effects of forage processing on (1) uniformity of …


Flaxlic Supplementation Improves Growth Performance Of Angus Bulls, A.C. Pesta, James S. Drouillard Jan 2010

Flaxlic Supplementation Improves Growth Performance Of Angus Bulls, A.C. Pesta, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Nutrition can affect bull fertility. Omega-3 fatty acids such as α linolenic, eicosapentaenoic, and docosahexaenoic acids can affect motility and morphology of sperm. Flaxseed is an excellent source of α linolenic acid and has been shown to increase tissue concentrations of both α linolenic acid and eicosapentaenoic acid, which are involved in synthesis of important reproductive hormones. Flax can be difficult to transport, process, and store, but the FlaxLic block (New Generation Feeds, Belle Fourche, SD) is stable and easy to handle, contains high levels of omega-3 fatty acids, and may be a useful supplement for developing beef bulls. In …


Effects Of Feeding Low Levels Of Crude Glycerin With Or Without Other By-Products On Performance And Carcass Characteristics Of Feedlot Heifers, C.J. Schneider, G.L. Parsons, K.A. Miller, L.K. Thompson, James S. Drouillard Jan 2010

Effects Of Feeding Low Levels Of Crude Glycerin With Or Without Other By-Products On Performance And Carcass Characteristics Of Feedlot Heifers, C.J. Schneider, G.L. Parsons, K.A. Miller, L.K. Thompson, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Expansion of the renewable fuels industries has increased availability of by-products that are well suited for use as cattle feed. Glycerin is among the principal by-products of biodiesel production, comprising approximately 10% (by weight) of the soybean oil that is used to manufacture soy-based diesel fuel. Our previous research evaluated effects of including between 0% and 16% glycerin in flaked-corn finishing diets and revealed that optimal growth performance was achieved with 2% glycerin addition. Our laboratory experiments have suggested that even lower levels of glycerin may be effective at stimulating digestion. Therefore, the objective of this study was to evaluate …


Effects Of Supplemental Protein And Energy On Digestion And Urea Kinetics In Beef Cattle, E.A. Bailey, D.W. Brake, David E. Anderson, M.L. Jones, Evan C. Titgemeyer, K. C. Olson Jan 2010

Effects Of Supplemental Protein And Energy On Digestion And Urea Kinetics In Beef Cattle, E.A. Bailey, D.W. Brake, David E. Anderson, M.L. Jones, Evan C. Titgemeyer, K. C. Olson

Kansas Agricultural Experiment Station Research Reports

Previous research at Kansas State University has shown that providing supplemental energy when protein is deficient will cause a decrease in digestion of low-quality forage. Our project examined the effects of supplemental glucose on low-quality forage intake and digestion. Urea recycling is a mechanism by which cattle preserve nitrogen when faced with a deficiency. Young, growing cattle receiving sufficient protein recycle large amounts of nitrogen to the rumen. Our goal was to explore the effects of providing supplemental energy and protein to cattle that are on the downward side of their growth curve. Specifically, we measured intake, digestion, and urea …


Effects Of Morinda Citrifolia On Growth Performance And Health Of High-Risk Calves, L.R. Hibbard, R.G. Godbee, M.P. Epp, Brandon E. Oleen, Dale A. Blasi, K. C. Olson Jan 2010

Effects Of Morinda Citrifolia On Growth Performance And Health Of High-Risk Calves, L.R. Hibbard, R.G. Godbee, M.P. Epp, Brandon E. Oleen, Dale A. Blasi, K. C. Olson

Kansas Agricultural Experiment Station Research Reports

Bovine respiratory disease continues to be the most costly disease affecting productivity and profitability in the stocker segment. Long-acting injectable antimicrobials are presently used to reduce the incidence and severity of bovine respiratory disease. However, future use of antimicrobial treatment may be significantly curtailed in light of an increasing negative perception of antibiotic usage in food animals by consumers and governmental agencies. Consequently, preconditioning and enhanced nutrition programs that may include nutraceuticals could become more prevalent. MorindaMax (Morinda International, Provo, UT) is a natural product manufactured from the Morinda citrifolia fruit (i.e., Noni). Published literature suggests this plant extract has …


Southwest Research-Extension Center, Field Day 2010 Jan 2010

Southwest Research-Extension Center, Field Day 2010

Kansas Agricultural Experiment Station Research Reports

Report of agricultural research from Southwest Research-Extension Center of Kansas State University.


Factors Affecting Storage Stability Of Various Commercial Phytase Sources (2010), R C. Sulabo, C K. Jones, D R. Campbell, B W. Ratliff, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2010

Factors Affecting Storage Stability Of Various Commercial Phytase Sources (2010), R C. Sulabo, C K. Jones, D R. Campbell, B W. Ratliff, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A 360-d study was performed to evaluate the effects of environmental conditions on storage stability of exogenous phytases. Coated and uncoated products from 3 phytase sources (Ronozyme P, OptiPhos, and Phyzyme) were stored as pure forms, in a vitamin premix, or in a vitamin and trace mineral (VTM) premix. Pure products were stored at 0, 41, 73, and 99ºF (75% humidity). Premixes were stored at 73 and 99ºF. Sampling was performed on d 0, 30, 60, 90, 120, 180, 270, and 360. Sampling of the pure products stored at 0 and 41ºF was discontinued after d 120 due to mold …


The Effects Of Feeder Adjustment On Growth Performance Of Finishing Pigs (2010), A J. Myers, J R. Bergstrom, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2010

The Effects Of Feeder Adjustment On Growth Performance Of Finishing Pigs (2010), A J. Myers, J R. Bergstrom, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 234 growing pigs (PIC TR4 x 1050, initially 91.4 lb) were used in an 89-d trial to determine the effects of feeder adjustment on finishing pig performance. Pigs were randomly allotted to 1 of 3 treatments. The treatments consisted of a narrow feeder adjustment (minimum gap opening of 0.50 in.), medium feeder adjustment (minimum gap opening of 0.75 in.), and wide adjustment (minimum feeder gap opening of 1.00 in.). The feeders were adjusted to the minimum gap setting, but the agitation plate could be moved upward to a maximum gap opening of 0.75, 1.00, or 1.25 in., …


Effects Of Dietary Astaxanthin, Ractopamine Hcl, And Gender On The Growth, Carcass, And Pork Quality Characteristics Of Finishing Pigs (2010), J R. Bergstrom, Terry A. Houser, Michael D. Tokach, Steven S. Dritz, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey Jan 2010

Effects Of Dietary Astaxanthin, Ractopamine Hcl, And Gender On The Growth, Carcass, And Pork Quality Characteristics Of Finishing Pigs (2010), J R. Bergstrom, Terry A. Houser, Michael D. Tokach, Steven S. Dritz, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey

Kansas Agricultural Experiment Station Research Reports

A total of 144 finishing pigs (initially 226 lb) were used to evaluate the effects of various levels and sources of added dietary astaxanthin (AX: 0, 2.5, 5, 7.5, and 10 ppm), as well as ractopamine HCl (Paylean), on growth, carcass, and pork quality characteristics of barrows and gilts. Pigs were blocked by gender and weight and randomly allotted to 1 of 9 dietary treatments fed for approximately 26 d pre-harvest. Dietary treatments consisted of a corn-soybean meal-based control, the control with 5, 7.5, or 10 ppm AX from Phaffia rhodozyma yeast, the control with 5 ppm synthetic AX, and …


Effects On Bacon Quality Of Feeding Increasing Glycerol And Dried Distillers Grains With Solubles To Finishing Pigs (2010), B L. Goehring, Terry A. Houser, Joel M. Derouchey, Melvin C. Hunt, Michael D. Tokach, Steven S. Dritz, B M. Gerlach, Robert D. Goodband, Jim L. Nelssen, John A. Unruh Jan 2010

Effects On Bacon Quality Of Feeding Increasing Glycerol And Dried Distillers Grains With Solubles To Finishing Pigs (2010), B L. Goehring, Terry A. Houser, Joel M. Derouchey, Melvin C. Hunt, Michael D. Tokach, Steven S. Dritz, B M. Gerlach, Robert D. Goodband, Jim L. Nelssen, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

A total of 84 barrows (PIC 337 x 1050, initially 68.3 lb) were fed a corn-soybean meal-based diet with added dried distillers grains with solubles (DDGS; 0 or 20%) and increasing glycerol (0, 2.5, or 5%) to determine the effects on belly quality. Criteria that were evaluated included: belly length, thickness, firmness, and slice yield; proximate and fatty acid analyses; iodine values; and sensory characteristics. There were no (P > 0.08) DDGS x glycerol interactions on any criteria measured. Inclusion of 20% DDGS in the diet decreased belly firmness (P < 0.04), as measured by the belly flop test (fat-side down method). Twenty percent DDGS decreased (P < 0.01) the percentage of myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, vaccenic acid, total saturated fatty acids, and total monounsaturated fatty acids. In contrast, 20% DDGS increased (P < 0.01) the percentage of linoleic acid, α-linolenic acid, eicosadienoic acid, total polyunsaturated fatty acids, unsaturated:saturated fatty acid ratios, polyunsaturated:saturated fatty acid ratios, and iodine values. The inclusion of 0, 2.5, and 5% glycerol in swine diets did not affect any measured criteria in this study. In conclusion, feeding DDGS at a level of 20% decreased belly firmness and changed the fatty acid profile; however, it did not affect belly processing or sensory characteristics. Glycerol fed at 2.5 or 5.0% did not affect belly quality, fatty acid profile, or sensory characteristics of bacon.; Swine Day, Manhattan, KS, November 18, 2010


Nutrient Analysis Of Sorghum Dried Distillers Grains With Solubles From Ethanol Plants Located In The Western Plains Region (2010), K M. Sotak, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2010

Nutrient Analysis Of Sorghum Dried Distillers Grains With Solubles From Ethanol Plants Located In The Western Plains Region (2010), K M. Sotak, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Samples of sorghum dried distillers grains with solubles (DDGS) were collected and analyzed to establish a nutrient database and evaluate the quality and consistency between and within samples taken from 5 ethanol plants in the Western Plains region. Four plants were located in Kansas and 1 in Texas. A total of 21 samples were collected, with 4 plants contributing 4 samples each and 1 plant contributing 5 samples from different manufacturing lots of DDGS. Each sample was analyzed for amino acids, DM, CP, crude fiber, crude fat, ash, NDF, ADF, Ca, P, trace minerals, GE, and starch. In addition, DE, …


The Importance Of Defining The Method In Particle Size Analysis By Sieving (2010), Adam C. Fahrenholz, Leland J. Mckinney, C E. Wurth, Keith C. Behnke Jan 2010

The Importance Of Defining The Method In Particle Size Analysis By Sieving (2010), Adam C. Fahrenholz, Leland J. Mckinney, C E. Wurth, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

The American Society of Agricultural and Biological Engineers (ASABE) publishes a standard for identifying particle size by sieving (ASABE S319.4). However, this standard includes a number of options that allow the test to be conducted differently, and different laboratories may analyze a single sample with different results. Options include the type of sieve shaker used, the use of sieve agitators, the use of a dispersion agent, and the sieving time. A small study was conducted to examine the effect of varying these methods on the calculated geometric mean diameter by weight (dgw) and geometric standard deviation by weight (sgw). Results …


A Comparison Of Denagard, Denagard/Ctc And Pulmotil On Nursery Pig Growth Performance And Economic Return (2010), K M. Sotak, M Hammer, J Y. Jacela, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2010

A Comparison Of Denagard, Denagard/Ctc And Pulmotil On Nursery Pig Growth Performance And Economic Return (2010), K M. Sotak, M Hammer, J Y. Jacela, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 880 weanling pigs (initially 15.6 lb and 16 to 20 d of age) were used in a 41-d experiment to compare the effects of different antibiotic regimens on growth performance and economic return in the nursery phase. Pigs were alloted to 1 of 5 treatment groups based on weight within gender. The antibiotic regimens included: (1) control diets containing no antibiotic throughout the trial, (2) a combination of Denagard (Novartis Animal Health, Greensboro, NC) at 35g/ton and chlortetracycline at 400g/ton (Denagard/CTC) for the entire 41-d trial, (3) a Pulmotil (Elanco, Greenfield, IN) regimen of 363g/ton from d …


Effects Of Mixing Late-Finishing Pigs Just Before Marketing On Growth Performance (2010), M L. Potter, J R. Bergstrom, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2010

Effects Of Mixing Late-Finishing Pigs Just Before Marketing On Growth Performance (2010), M L. Potter, J R. Bergstrom, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 512 commercial finishing pigs were used in a 15-d trial to determine the effects of mixing late-finishing pigs from 1 or 2 barns at different stocking densities on pig performance prior to marketing. Close-to-market-weight pigs from 2 barns (north barn or south barn) were placed in 32 single-sex pens in the north barn at densities of either 12 or 20 pigs per pen. Pens of pigs were allotted to 1 of 4 mixing treatments (8 pens per treatment). Mixing treatments were: (1) nonmixed pens with 12 north barn pigs (control), (2) mixing 6 north barn pigs with …


Effects Of Feed-Withdrawal Time On Finishing-Pig Carcass Characteristics And Economics In A Commercial Environment (2010), H L. Frobose, L N. Edwards, K J. Prusa, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2010

Effects Of Feed-Withdrawal Time On Finishing-Pig Carcass Characteristics And Economics In A Commercial Environment (2010), H L. Frobose, L N. Edwards, K J. Prusa, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

The effects of feed-withdrawal time on finishing-pig carcass composition and net returns were determined in 2 studies. In Exp. 1, a total of 728 pigs (BW = 286.4 ± 2.7 lb, 10 to 19 pigs per pen) were marketed from 48 pens that were randomly assigned to 1 of 4 treatments: feed withdrawal times of 7, 24, 36, or 48 h before harvest. Pigs were fed a common corn-soybean meal diet containing dried distillers grains with solubles (DDGS) and bakery co-products. As expected, increased feed withdrawal time decreased (linear; P < 0.001) live weight. Withholding feed also decreased (linear; P < 0.03) HCW and backfat depth. Percentage yield increased (quadratic; P < 0.01) with longer withdrawal periods, as did percentage lean (linear; P < 0.01). Withholding feed increased (quadratic; P < 0.01) live price and, accordingly, also increased (linear; P < 0.001) carcass price. These results were due in part to increased (linear; P < 0.02) premiums and decreased (linear; P < 0.01) weight discounts. Total value and net revenue received were similar (P > 0.32) between treatments as HCW decreased in fasted pigs, but …


Effects Of Vomitoxin Concentration In Nursery Pig Diets And The Effectiveness Of Commercial Products To Mitigate Its Effects (2010), J A. Barnes, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2010

Effects Of Vomitoxin Concentration In Nursery Pig Diets And The Effectiveness Of Commercial Products To Mitigate Its Effects (2010), J A. Barnes, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 180 pigs (PIC TR4 x 1050, initially 22.8 lb and 34 d of age) were used in a 21-d trial to evaluate the effects of vomitoxin concentration in nursery pig diets and the effectiveness of commercial products to mitigate vomitoxin's negative effects on performance. Pens of pigs were balanced by initial weight and were randomly allotted to 1 of 5 dietary treatments with 6 replications per treatment. Dietary treatments included a control diet consisting of corn-soybean meal and regular dried distillers grains with solubles (DDGS; low vomitoxin), a negative control diet containing 4 ppm dietary vomitoxin (from …