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Kansas Agricultural Experiment Station Research Reports

2012

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Articles 1 - 30 of 79

Full-Text Articles in Life Sciences

Effects Of Increasing Dietary Bakery By-Product On Growing-Finishing Pig Growth Performance And Carcass Quality (2012), C B. Paulk, S Nitikanchana, K J. Prusa, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2012

Effects Of Increasing Dietary Bakery By-Product On Growing-Finishing Pig Growth Performance And Carcass Quality (2012), C B. Paulk, S Nitikanchana, K J. Prusa, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,263 pigs (PIC 337 × 1050; initially 77.8 lb) were used in a 102-d study to determine the effects of dietary bakery by-product on pig growth performance and carcass quality. Pigs were randomly assigned to pens based on gender (14 barrow pens, 11 gilt pens, and 23 mixed-gender pens). Pens of pigs were allotted to 1 of 3 dietary treatments in a completely randomized design while balancing for initial BW and gender. Dietary treatments included 0, 7.5, and 15% bakery by-product. On d 84, the 5 heaviest pigs from each pen (determined visually) were sold according to …

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The Interactive Effects Of Easyzyme And Phytase In Diets Containing High-Fiber Co-Products On Growth Performance Of Nursery Pigs (2012), A B. Graham, S Nitikanchana, Jong J.A. De, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2012

The Interactive Effects Of Easyzyme And Phytase In Diets Containing High-Fiber Co-Products On Growth Performance Of Nursery Pigs (2012), A B. Graham, S Nitikanchana, Jong J.A. De, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effects of a dietary non-starch polysaccharide enzyme (Easyzyme, Archer Daniels Midland Co., Decatur, IL) or phytase (Phyzyme, Danisco Animal Nutrition, St. Louis, MO) addition in corn-soybean meal or high-fiber diets on nursery pig growth performance. In Exp. 1, 192 nursery pigs (PIC 327 × 1050, initially 21.8 lb) were allotted to 1 of 4 dietary treatments arranged in a 2 × 2 factorial. Main effects were diet type (corn-soybean meal or corn-soybean meal plus 30% wheat middlings) with or without added dietary enzyme (Easyzyme Mixer 1, 1 lb/ton). Each experiment involved 6 pigs …

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Feed Efficiency In Swine: A Survey Of Current Knowledge (2012), J R. Flohr, J F. Patience, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2012

Feed Efficiency In Swine: A Survey Of Current Knowledge (2012), J R. Flohr, J F. Patience, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Pork producers and advisers to the swine industry were surveyed about their knowledge of feed efficiency. The questionnaire was designed to accomplish three objectives: (a) determine the level of knowledge related to feed efficiency topics, (b) identify production practices being used that influence feed efficiency, and (c) identify information gaps or areas requiring additional knowledge to further improve feed efficiency. Producer responses imply that they are unfamiliar with information behind the effects of fat inclusion, particle size reduction, feed additives, and thermal environment on feed efficiency. Many were not sure which energy system to use for evaluating dietary energy. Consultants …

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Evaluation Of Novel Enzyme Blend On Nursery Pig Performance (2012), Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2012

Evaluation Of Novel Enzyme Blend On Nursery Pig Performance (2012), Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effects of a dietary enzyme blend and diet complexity on weanling pig performance. In Exp. 1, 180 pigs (initially 12.7 lb BW and 21 d of age) were used in an 18-d growth trial. Pigs were blocked by weight and randomly allotted to 1 of 3 dietary treatments with 5 pigs per pen and 12 pens per treatment. The 3 dietary treatments included (1) a high-complexity positive control, (2) a low-complexity negative control, and (3) a treatment with an added proprietary enzyme blend (Engrain LLC, Manhattan, KS). All diets were fed in 2 …

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An Evaluation Of Supplemental Vitamin D3 On Growth Performance Of Pigs Pre- And Postweaning, Nursery Feed Preference, And Serum 25(Oh)D3 (2012), J R. Flohr, Steven C. Henry, M L. Potter, N S. Shelton, L Greiner, J Conner, C W. Hastad, D Murray, R Cain, K Frerichs, E L. Hansen, E Fruge, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2012

An Evaluation Of Supplemental Vitamin D3 On Growth Performance Of Pigs Pre- And Postweaning, Nursery Feed Preference, And Serum 25(Oh)D3 (2012), J R. Flohr, Steven C. Henry, M L. Potter, N S. Shelton, L Greiner, J Conner, C W. Hastad, D Murray, R Cain, K Frerichs, E L. Hansen, E Fruge, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Three experiments were conducted to evaluate the effects of supplementing different concentrations and sources of vitamin D3 on pig performance, feed preference, and serum 25(OH)D3. In Exp. 1, a total of 398 barrows from 80 litters (PIC 1050, initially 7 d of age) were used in a 38-d study in a 2 × 2 factorial to determine the effects of vitamin D3 supple¬mentation from either a single oral dose or from high levels of vitamin D3 in early nurs¬ery diets on pig performance and serum 25(OH)D3. On d 7 after birth, matched sets of pigs within litters were allotted to …

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Southwest Research-Extension Center, Field Day 2012 Jan 2012

Southwest Research-Extension Center, Field Day 2012

Kansas Agricultural Experiment Station Research Reports

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

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Effect Of Sampling Method On The Accuracy And Precision Of Estimating The Mean Pig Weight Of The Population (2012), C B. Paulk, G L. Highland, K D. Haydon, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2012

Effect Of Sampling Method On The Accuracy And Precision Of Estimating The Mean Pig Weight Of The Population (2012), C B. Paulk, G L. Highland, K D. Haydon, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Producers have adopted marketing strategies such as topping to help reduce economic losses from weight discounts at the processing plant. Despite adopting these strategies, producers are still missing target weights and incurring discounts. One contributing factor is the error of sampling methods that producers use to estimate the mean weight of the population to determine the optimal time to top pigs. The standard sample size that has been adopted by many producers is 30 pigs. Our objective was to determine the best method for selecting 30 pigs to improve the accuracy and precision of estimating the mean pig weight of …

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Effect Of Sample Size And Method Of Sampling Pig Weights On The Accuracy And Precision Of Estimating The Distribution Of Pig Weights In A Population (2012), C B. Paulk, G L. Highland, K D. Haydon, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2012

Effect Of Sample Size And Method Of Sampling Pig Weights On The Accuracy And Precision Of Estimating The Distribution Of Pig Weights In A Population (2012), C B. Paulk, G L. Highland, K D. Haydon, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Producers have adopted marketing strategies such as topping to help reduce economic losses from weight discounts, but they are still missing target weights and incurring discounts. We have previously determined the accuracy of sampling methods producers use to estimate the mean weight of the population. Although knowing the mean weight is important, understanding how much variation or dispersion exists in individual pig weights within a group can also enhance a producer's ability to determine the optimal time to top pigs. In statistics and probability theory, the amount of variation in a population is represented by the standard deviation; therefore, our …

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Effect Of Diet Form And Feeder Adjustment On Growth Performance Of Nursery Pigs (2012), J E. Nemechek, E Fruge, E Hansen, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2012

Effect Of Diet Form And Feeder Adjustment On Growth Performance Of Nursery Pigs (2012), J E. Nemechek, E Fruge, E Hansen, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effect of feeder adjustment and diet form on growth performance of nursery pigs. In Exp. 1, a total of 210 nursery pigs (PIC 1050 × 327, initially 26.2 lb BW) were used in a 21-d trial. In Exp. 2, a total of 1,005 nursery pigs (Fast × PIC sows × TR4 boars, initially 31.1 lb BW) were used in a 28-d trial. Treatments in both experiments were arranged as 2 × 3 factorials with main effects of feeder adjustment and diet form. The 2 feeder adjustments consisted of a narrow feeder adjustment (minimum …

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The Effects Of Microsource S On Growth Performance, Fecal Consistency, And Postcleaning Microbial Load Of Growing-Finishing Pigs (2012), S Nitikanchana, Joel M. Derouchey, J R. Bergstrom, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2012

The Effects Of Microsource S On Growth Performance, Fecal Consistency, And Postcleaning Microbial Load Of Growing-Finishing Pigs (2012), S Nitikanchana, Joel M. Derouchey, J R. Bergstrom, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,245 pigs (PIC 1050 × 337, initially 106 lb) were used in a 90-d study to determine the effects of MicroSource S (DSM Nutritional Products Inc., Parsippany, NJ) and diet type on growth performance, carcass traits, fecal consistency, pen cleaning time, and postcleaning microbial load in growing-finishing pigs raised under commercial conditions. Pens of pigs were balanced by initial weight and randomly allotted to 1 of 6 dietary treatments in a completely randomized design with 25 to 26 pigs per pen and 8 replications per treatment. Treatments were arranged as a 3 × 2 factorial with main …

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Determining The Effects Of Standardized Ileal Digestible Tryptophan:Lysine Ratio And Tryptophan Source In Diets Containing Dried Distillers Grains With Solubles On Growth Performance And Carcass Characteristics Of Finishing Pigs (2012), S Nitikanchana, J L. Usry, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2012

Determining The Effects Of Standardized Ileal Digestible Tryptophan:Lysine Ratio And Tryptophan Source In Diets Containing Dried Distillers Grains With Solubles On Growth Performance And Carcass Characteristics Of Finishing Pigs (2012), S Nitikanchana, J L. Usry, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 2,290 pigs (PIC 1050 × 337; initially 157 lb) were used to determine the effect of tryptophan source (L-tryptophan vs. soybean meal) and increasing SID tryptophan:lysine ratio in diets containing 30% dried distillers grains with solubles (DDGS) on finishing pig performance. Pens of pigs were balanced by initial weight and randomly allotted to 1 of 7 dietary treatments in a completely randomized design with 26 to 28 pigs per pen and 10 to 13 replications per treatment. Treatments were arranged as a 2 × 3 factorial with main effects of tryptophan source (L-tryptophan or soybean meal) and …

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Effect Of Dietary Addition Of Denagard (Tiamulin) And Ctc (Chlortetracycline) On Pig Performance Immediately After Placement In The Finishing Barn (2012), S Nitikanchana, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2012

Effect Of Dietary Addition Of Denagard (Tiamulin) And Ctc (Chlortetracycline) On Pig Performance Immediately After Placement In The Finishing Barn (2012), S Nitikanchana, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,313 pigs (PIC 1050 × 337; initially 49 lb) were used in a 35-d study to determine the effects of adding Denagard (Tiamulin) and CTC (chlortetracycline) to feed on pig performance immediately after placement in the finisher barn. Pigs were transported from one nursery facility and placed into the finishing barn without maintaining pen integrity. Immediately after placement in the finishing barn, pens of pigs were weighed and randomly allotted to treatments arranged in a 2 × 2 factorial with main effects of Denagard (0 and 35 g/ton; Novartis Animal Health, Greensboro, NC) and chlortetracycline (CTC; 0 …

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The Effects Of Immunocastration And Dried Distillers Grains With Solubles Withdrawal On Growth Performance, Carcass Characteristics, Fatty Acid Analysis, And Iodine Value Of Pork Fat Depots (2012), M D. Asmus, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2012

The Effects Of Immunocastration And Dried Distillers Grains With Solubles Withdrawal On Growth Performance, Carcass Characteristics, Fatty Acid Analysis, And Iodine Value Of Pork Fat Depots (2012), M D. Asmus, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,360 pigs (PIC 337 × 1050, initially 53.0 lb) were used in a 125-d study to determine the effects of dried distillers grains with solubles (DDGS) withdrawal post-immunocastration (IC; Improvest, Pfizer Animal Health, Kalamazoo, MI) on growth performance and carcass fat quality of growing-finishing pigs. Pens of pigs were randomly allotted by initial weight and gender (barrows or IC) to 1 of 3 dietary treatments with 8 replications per treatment for a total of 48 pens with 27 to 29 pigs per pen. Treatments were arranged in a 2 × 3 factorial with the main effects of …

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Effects Of Replacing Soybean Meal With High-Protein Dried Distillers Grains With Solubles On Growth Performance, Carcass Characteristics, And Carcass Fat Quality In Finishing Pigs (2012), D L. Goehring, J L. Usry, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz Jan 2012

Effects Of Replacing Soybean Meal With High-Protein Dried Distillers Grains With Solubles On Growth Performance, Carcass Characteristics, And Carcass Fat Quality In Finishing Pigs (2012), D L. Goehring, J L. Usry, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 204 barrows and gilts (PIC, 337 × 1050, initially 129.6 lb) were used in a 73-d study to determine the effects of replacing soybean meal (SBM) with high-protein dried distillers grains with solubles (HPDDGS) on growth performance, carcass characteristics, and carcass fat quality in finishing pigs. Pens of pigs (3 barrows and 3 gilts per pen) were randomly allotted by initial BW to 1 of 4 treatments with 8 or 9 replications per treatment. All pigs were fed diets with 15% HPDDGS for 10 d prior to the start of the study. Treatments included: (1) corn-soybean meal …

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The Effects Of Soybean Hulls In Corn-Soybean Meal And Corn-Soybean Meal-Dried Distillers Grains With Solubles Diets On Nursery Pig Performance (2012), D L. Goehring, B W. James, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2012

The Effects Of Soybean Hulls In Corn-Soybean Meal And Corn-Soybean Meal-Dried Distillers Grains With Solubles Diets On Nursery Pig Performance (2012), D L. Goehring, B W. James, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to evaluate the effects of soybean hulls in diets with and without corn dried distillers grains with solubles (DDGS) on nursery pig growth performance. In Exp. 1, a total of 600 pigs (PIC C-29 × 359, initially 14.7 lb) were used in a 42-d growth study. Diets contained increasing amounts of soybean hulls (0, 3, 6, 9, or 12%) in either corn-soybean meal or corn-soybean meal-DDGS—based diets (15 and 30% DDGS for Phases 1 and 2, respectively). Pigs were blocked by initial pen weight, gender, and room location, with 10 pigs per pen and 6 replications …

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The Effects Of Corn- Or Sorghum-Based Diets With Or Without Sorghum Dried Distillers Grains With Solubles On Lactating Sow And Litter Performance (2012), K M. Sotak, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2012

The Effects Of Corn- Or Sorghum-Based Diets With Or Without Sorghum Dried Distillers Grains With Solubles On Lactating Sow And Litter Performance (2012), K M. Sotak, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 140 sows (PIC 1050) and their litters were used to determine the effects of corn- or sorghum-based diets with or without 20% sorghum dried distillers grains with solubles (DDGS) on lactating sow and litter performance. On d 110 of gestation, sows were allotted to 1 of 4 dietary treatments arranged in a 2 × 2 factorial with main effects of grain source (corn vs. sorghum) and sorghum DDGS (0 vs. 20%; 32.1% CP and 9.2% crude fat as-fed). All diets were formulated to 0.97% standardized ileal digestible lysine but were not balanced for energy. Litters were equalized …

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Evaluation Of Yogurt With Enhanced Cysteine Content (2012), Soumya Bala, Karen A. Schmidt Jan 2012

Evaluation Of Yogurt With Enhanced Cysteine Content (2012), Soumya Bala, Karen A. Schmidt

Kansas Agricultural Experiment Station Research Reports

Amino acids are the building blocks of protein and assist with metabolism in the body. In the human body, the amino acid cysteine can be synthesized from methionine by the enzyme Î¥-cystathionase. Because certain human subpopulations such as those prone to cataracts have decreased Î¥-cystathionase activity, dietary cysteine may be beneficial. Nutritionally, yogurt mix is one of the best dairy food sources of methionine and cysteine, but the heat treatment used in manufacturing yogurt decreases the dietary availability of cysteine. Last year, it was shown that supplementing yogurt mixes with whey protein isolate (WPI) (>90% protein) and processing yogurt …

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Director's Report Of Research In Kansas 2012, Kansas State University. Agricultural Experiment Station Jan 2012

Director's Report Of Research In Kansas 2012, 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.

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Southwest Research-Extension Center Field Day 2012 Jan 2012

Southwest Research-Extension Center Field Day 2012

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.

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Agreement Between Observational And Necropsy-Derived Diagnosis For Cause Of Death For Cattle In A Commercial Beef Feedlot (2012), D. Anspaugh, Benjamin W. Wileman, M. Apley, W. Taylor, T. Noffsinger, Daniel U. Thomson, Christopher D. Reinhardt Jan 2012

Agreement Between Observational And Necropsy-Derived Diagnosis For Cause Of Death For Cattle In A Commercial Beef Feedlot (2012), D. Anspaugh, Benjamin W. Wileman, M. Apley, W. Taylor, T. Noffsinger, Daniel U. Thomson, Christopher D. Reinhardt

Kansas Agricultural Experiment Station Research Reports

Necropsy information is an integral component for monitoring feedlot disease and designing preventive and therapeutic strategies; however, field necropsy is a laborious and time-consuming procedure and may be an occupational hazard because personnel can become injured or be exposed to zoonotic disease while conducting necropsies. The objective of this study was to determine the accuracy of a pre-necropsy mortality diagnoses made by feedlot personnel compared with diagnoses made from necropsy results.

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Relationships Between Feedlot Health, Average Daily Gain, And Carcass Traits Of Angus Steers (2012), M.L. Hands, T.T. Marston, L.R. Corah, Christopher D. Reinhardt, Justin W. Waggoner Jan 2012

Relationships Between Feedlot Health, Average Daily Gain, And Carcass Traits Of Angus Steers (2012), M.L. Hands, T.T. Marston, L.R. Corah, Christopher D. Reinhardt, Justin W. Waggoner

Kansas Agricultural Experiment Station Research Reports

Morbidity reduces performance and quality grade, but the effects of morbidity on quality grade independent of its effect on carcass fatness are rarely documented. As feedlot cattle fatten, a greater proportion of their daily carcass gain goes to fat deposition, and greater carcass fat is consistent with greater marbling score. Higher-grading cattle are often assumed to have reduced feedlot performance. Objectives of this research were to document the impacts of various animal and non-animal factors on feedlot average daily gain, health, and carcass traits in Angus steers and to correlate quality and yield grade components of carcass with live performance.

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Led Lighting Extends Color Shelf Life For Three Beef Products Compared With Fluorescent Lighting (2012), K.S. Steele, M.J. Weber, Elizabeth A.E. Boyle, A.S. Lobaton-Sulabo, C. Cundith, Y.H. Hiebert, K.A. Abrolat, J.M. Attey, S.D. Clark, D. Johnson Jan 2012

Led Lighting Extends Color Shelf Life For Three Beef Products Compared With Fluorescent Lighting (2012), K.S. Steele, M.J. Weber, Elizabeth A.E. Boyle, A.S. Lobaton-Sulabo, C. Cundith, Y.H. Hiebert, K.A. Abrolat, J.M. Attey, S.D. Clark, D. Johnson

Kansas Agricultural Experiment Station Research Reports

Consumers are not able to estimate tenderness, juiciness, or flavor when selecting beef cuts at retail stores. Instead, they rely on color as one of the major criteria to select beef cuts. During refrigerated display, fresh meat color changes and consumers discriminate against discolored meats. Meat items with discoloration must be discounted or discarded, leading to up to $1 billion in revenue loss nationally for the meat industry. Lighting type and intensity have a major impact on the appearance and shelf life of fresh beef in refrigerated retail display. Light emitting diode (LED) lighting offers advantages for display because it …

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Effect Of Transportation On E. Coli O157:H7 Prevalence And Coliform Concentrations In Feces Of Feedlot Cattle (2012), C. Aperce, James S. Drouillard Jan 2012

Effect Of Transportation On E. Coli O157:H7 Prevalence And Coliform Concentrations In Feces Of Feedlot Cattle (2012), C. Aperce, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Foodborne illness from Escherichia coli O157:H7 is a major concern for the food industry. Contamination of food products can occur at slaughter by contact with hide or feces. Limiting E. coli O157:H7 shedding is important to prevent outbreaks. Previous studies have demonstrated a relationship between stress and levels of pathogens shed in feces. During transport to the slaughterhouse, animals are subjected to large amounts of stress. This stress could increase shedding of E. coli O157:H7 prior to slaughter, and in so doing increase the risk of contamination of beef products by contact with hides or feces. Our objective in this …

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Mga And Growth Promotants Administered To Beef Feedlot Heifers Have No Effect On Subsequent Oocyte Quality Or In Vitro Embryo Production (2012), N. Miller, David M. Grieger, Karol E. Fike Jan 2012

Mga And Growth Promotants Administered To Beef Feedlot Heifers Have No Effect On Subsequent Oocyte Quality Or In Vitro Embryo Production (2012), N. Miller, David M. Grieger, Karol E. Fike

Kansas Agricultural Experiment Station Research Reports

Beef feedlot heifers have the potential to serve as viable donors of oocytes post-slaughter for in vitro embryo production. Oocyte quality is a critical factor affecting the success of in vitro embryo production and can be influenced by factors such as age and reproductive status, ovarian follicle size, and nutritional status of the donor female. In a conventional feedlot setting, heifers are typically administered steroid-based growth promotants and fed melengestrol acetate (MGA) for suppression of estrus, which increases circulating concentrations of reproductive steroids, particularly estradiol. The effects of these management practices on oocyte quality and numbers are unknown. The purpose …

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Meta-Analysis Comparing Growth Performance, Carcass Characteristics, And Water Usage Of Growing-Finishing Pigs Fed Using Conventional Dry And Wet-Dry Feeders (2012), S Nitikanchana, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2012

Meta-Analysis Comparing Growth Performance, Carcass Characteristics, And Water Usage Of Growing-Finishing Pigs Fed Using Conventional Dry And Wet-Dry Feeders (2012), S Nitikanchana, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Fifteen trials were used for meta-analyses comparing the effects of conventional dry (CD) and wet-dry (WD) feeders on growth performance, carcass traits, and water usage of growing-finishing pigs. The meta-analysis indicated that pigs fed with WD feeders consistently had greater (P<0.01) ADG (0.09 lb/d) and ADFI compared with those fed with CD feeders; however, although highly variable, no overall difference (P = 0.93) was observed in F/G. As a result of improved growth rate, final BW and HCW of pigs fed with WD feeders was 3.2% greater (P<0.01) than when fed with CD feeders. For carcass traits, backfat was greater (P<0.01) and percentage lean was lower (P<0.01) in pigs fed with WD feeders compared with those fed with CD feeders. Carcass yield and loin depth did not differ (P>0.14) among feeder types. Water usage for pigs fed with WD feeders was 0.4 gal/pig/d less (P = 0.02) than for pigs using CD feeders. Growing-finishing pigs fed with WD feeders had increased growth rate, feed intake, final BW, and HCW, but deposited more fat as indicated by greater backfat and lower percentage lean.; Swine Day, Manhattan, KS, November …

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Effects Of Feeding Varying Ingredient Particle Sizes And Diet Forms For 25- To 50-Lb Nursery Pigs On Performance, Caloric Efficiency, And Economics (2012), J A. De Jong, Michael D. Tokach, Leland J. Mckinney, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2012

Effects Of Feeding Varying Ingredient Particle Sizes And Diet Forms For 25- To 50-Lb Nursery Pigs On Performance, Caloric Efficiency, And Economics (2012), J A. De Jong, Michael D. Tokach, Leland J. Mckinney, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 675 pigs (PIC 1050 barrows; initially 24.5 lb BW and 37 d of age) were used in a 21-d study to determine the effects of feeding varying ingredient particle sizes and diet form for 25- to 50-lb nursery pigs on performance, caloric efficiency, and economics. Pens of pigs were balanced by initial BW and randomly allotted to 1 of 8 dietary treatments with 17 replications per treatment and 5 pigs per pen in two groups of nursery pigs. The 8 experimental diets included 3 corn-soybean meal—based diets consisting of: (1) corn fraction ground to an average of …

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Bedding Material In Dirt-Floor Pens Reduces Heat (2012), D.J. Rezac, Daniel U. Thomson, Christopher D. Reinhardt Jan 2012

Bedding Material In Dirt-Floor Pens Reduces Heat (2012), D.J. Rezac, Daniel U. Thomson, Christopher D. Reinhardt

Kansas Agricultural Experiment Station Research Reports

Weather-related stressors are a well-recognized opponent to animal welfare and can have important ramifications for animal performance. Sound animal husbandry practices historically have attempted to diminish the effects of deleterious environmental factors. Providing aid to animals when temperatures are above or below their thermal neutral zone (TNZ) can improve animal welfare and/or performance. Because most breeds of cattle are not well equipped to deal with heat, the temperatures at which heat stress can begin to affect cattle can be surprisingly low. The onset of mild heat stress can occur at a temperature humidity index (THI1) value of 75, which can …

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Comparative Efficacy Of Two Ivermectin Pour-On Anthelmintics In Beef Steers In A Commercial Feedyard (2012), A.J. Tarpoff, T. Guichon, Daniel U. Thomson, Benjamin W. Wileman, Christopher D. Reinhardt Jan 2012

Comparative Efficacy Of Two Ivermectin Pour-On Anthelmintics In Beef Steers In A Commercial Feedyard (2012), A.J. Tarpoff, T. Guichon, Daniel U. Thomson, Benjamin W. Wileman, Christopher D. Reinhardt

Kansas Agricultural Experiment Station Research Reports

Generic products generally have a cost advantage for beef producers over brand-name products. Recently, many beef producers have debated whether to utilize generic anthelmintics in cow/calf herds and feeder cattle. If generics are to be justified, the products must be proven to have efficacy similar to the brand-name product. Previous studies have indicated that generic macrocyclic lactones are less effective in controlling gastrointestinal parasites of cattle than the original brand-name products. The objective of this study was to compare the efficacy of Vetrimec (Norbrook Laboratories Limited, Newry, Co. Down, Northern Ireland) pour-on and Ivomec (Merial Animal Health, Duluth, GA) pour-on …

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Comparison Of The Effects Of Three Different Dehorning Techniques On Behavior And Performance In Feeder Cattle In A Western Kansas Feedlot (2012), C.D. Neely, C.A. Kerr, David E. Anderson, Daniel U. Thomson, Christopher D. Reinhardt Jan 2012

Comparison Of The Effects Of Three Different Dehorning Techniques On Behavior And Performance In Feeder Cattle In A Western Kansas Feedlot (2012), C.D. Neely, C.A. Kerr, David E. Anderson, Daniel U. Thomson, Christopher D. Reinhardt

Kansas Agricultural Experiment Station Research Reports

Removing the horns of cattle when they arrive at feeding facilities is a common practice to reduce injury to other cattle. Bruising on carcasses of cattle that have been housed in pens containing horned cattle increases noticeably. Horned feeder cattle marketed in Arkansas regional livestock auction barns received average discounts of $3.23/cwt in 2005, giving producers the incentive to dehorn their cattle before marketing. Three common techniques (tipping, dehorning, and banding) are utilized in the field to remove or reduce horn length in beef cattle. Tipping is the practice of removing the tip of the horn such that the diameter …

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Vaccinating With Srp E. Coli Does Not Affect Feeder Cattle Performance, Health, Or Carcass Characteristics (2012), D.J. Rezac, B.A. Butler, Daniel U. Thomson, Benjamin W. Wileman, Christopher D. Reinhardt Jan 2012

Vaccinating With Srp E. Coli Does Not Affect Feeder Cattle Performance, Health, Or Carcass Characteristics (2012), D.J. Rezac, B.A. Butler, Daniel U. Thomson, Benjamin W. Wileman, Christopher D. Reinhardt

Kansas Agricultural Experiment Station Research Reports

Siderophore-receptor and porin-based (SRP) Escherichia coli vaccine technology functions by starving the E. coli organism via competitive exclusion for proteins that scavenge iron, an essential nutrient for E. coli viability. Vaccination with SRP E. coli technology decreased the prevalence of E. coli O157:H7 in artificially inoculated cattle and in cattle naturally shedding the organism. Examination of the effects that SRP E. coli vaccines exert on performance parameters has yet to be attempted in a commercial setting. The use of SRP E. coli vaccine technology effectively decreases the prevalence of E. coli O157:H7 in feeder cattle and may improve beef safety; …

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