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Articles 1 - 30 of 87

Full-Text Articles in Life Sciences

Developing Accurate Spatial Maps Of Cotton Fiber Quality Parameters, Gretchen F. Sassenrath Apr 2008

Developing Accurate Spatial Maps Of Cotton Fiber Quality Parameters, Gretchen F. Sassenrath

Conference on Applied Statistics in Agriculture

Awareness of the importance of cotton fiber quality (Gossypium, L. sps.) has increased as advances in spinning technology require better quality cotton fiber. Recent advances in geospatial information sciences allow an improved ability to study the extent and causes of spatial variability in fiber parameters. However, these studies are often harvested by hand and ginned on small research gins. Fiber quality from cotton lint harvested and ginned in this manner is different from that machine-harvested and ginned on production-scale equipment. The objective of this study was to develop a method of correcting for error introduced into cotton fiber quality parameters …

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Nonlinear Mixed Models To Evaluate Effects Of Environment Conditions, Hair Coat, And Anchor Length On Body Temperature During Afternoon Milking Of Holstein Cows In Hawaii, N Aitha, A. M. Parkhurst, C. N. Lee, P. E. Hillman Apr 2008

Nonlinear Mixed Models To Evaluate Effects Of Environment Conditions, Hair Coat, And Anchor Length On Body Temperature During Afternoon Milking Of Holstein Cows In Hawaii, N Aitha, A. M. Parkhurst, C. N. Lee, P. E. Hillman

Conference on Applied Statistics in Agriculture

A hot thermal environment is one factor that causes loss of activity, productivity and even death in cows. One reason may be the effect of hair coat (black or white) on body temperature during different activities and environment conditions. In this study, we attempt to characterize the relationship between body temperature over time using activity, physiological and environmental effects with a nonlinear regression model. The fixed and mixed versions of models are examined. We also examine the effect of the measuring device, anchor length (long or short). Environmental effects, such as, air temperature, thermal heat index (THI), relative humidity, solar …

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A Two-Stage Approach For Estimating The Effect Of Dna Methylation On Differential Expression Using Tiling Array Technology, Suk-Young Yoo, R. W. Doerge Apr 2008

A Two-Stage Approach For Estimating The Effect Of Dna Methylation On Differential Expression Using Tiling Array Technology, Suk-Young Yoo, R. W. Doerge

Conference on Applied Statistics in Agriculture

Epigenetics is the study of heritable alterations in gene function without changing the DNA sequence itself. It is known that epigenetic modifications such as DNA methylation and histone modifications are highly correlated with the regulation of gene expression. A twostage analysis is proposed that employs a hidden Markov model and a linear model to evaluate differential expression as related to DNA methylation for the purpose of examining the effects of DNA methylation on gene regulation using tiling array technology. In the first stage, a hidden Markov model (HMM) is employed to estimate the methylation status per tile by utilizing information …

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Spatial Clustering Using The Likelihood Function, April Kerby, David Marx, Ashok Samal, Viacheslav Adamchuk Apr 2008

Spatial Clustering Using The Likelihood Function, April Kerby, David Marx, Ashok Samal, Viacheslav Adamchuk

Conference on Applied Statistics in Agriculture

Clustering has been widely used as a tool to group multivariate observations that have similar characteristics. However, most attempts at formulating a method to group similar multivariate observations while taking into account their spatial location are relatively ad hoc and do not account for the underlying spatial structure of the variables measured [12, 13, 14]. This paper proposes a method to spatially cluster similar observations based on the likelihood function. The geographic or spatial location of the observations can be incorporated into the likelihood of the multivariate normal distribution through the variance-covariance matrix. The variance-covariance matrix can be computed using …

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Statistical Issues In Efficacy Evaluation For Companion Animal Drug Development, Zhanglin Lin Cui, Wherly Hoffman Apr 2008

Statistical Issues In Efficacy Evaluation For Companion Animal Drug Development, Zhanglin Lin Cui, Wherly Hoffman

Conference on Applied Statistics in Agriculture

Companion animals, commonly called pets, are animals such as dogs, cats, and horses. The companion animal drug market has expanded rapidly in recent years. Two major points of focus in companion animal drug development are therapeutics and parasiticides. From a statistics point of view, experimental design, experimental unit determination, sample size estimation and reestimation, treatment design, data transformation, multiple testing, and proper modeling are major statistical issues when efficacy evaluation in a companion animal study is conducted. These major statistical issues are addressed using two clinical studies as examples: Reconcile® (Fluoxetine) for the treatment of separation anxiety in dogs and …

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Modeling Seasonal Wine Grape Development Using A Mixture Technique, William J. Price, Bahman Shafii, Paul E. Blom, Julie M. Tarara, Nick Dokoozlian, Luis J. Sanchez Apr 2008

Modeling Seasonal Wine Grape Development Using A Mixture Technique, William J. Price, Bahman Shafii, Paul E. Blom, Julie M. Tarara, Nick Dokoozlian, Luis J. Sanchez

Conference on Applied Statistics in Agriculture

Biological growth data typically display an increasing sigmoidal pattern over time. Grape development is no exception and shows a similar general trend. A detailed examination of the growth process in grapes, however, reveals a few systematic deviations from this pattern. Specifically, grape development is often characterized by localized areas of growth plateaus leading to an overall growth pattern referred to as a double sigmoidal curve. Capturing and characterizing these local changes in growth is important as they represent important phases in grape development such as veraison. This paper utilizes a model adapted from the technique of mixture models to estimate …

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Comparisons Of Two Symmetric Density Function Solutions Of Aphid Population Growth Models, J. H. Matis, T. R. Kiffey, W. Van Der Werf, A. C. Costamagna, T. I. Matis, G. J. Michels Jr Apr 2008

Comparisons Of Two Symmetric Density Function Solutions Of Aphid Population Growth Models, J. H. Matis, T. R. Kiffey, W. Van Der Werf, A. C. Costamagna, T. I. Matis, G. J. Michels Jr

Conference on Applied Statistics in Agriculture

Aphids are among the world's most devastating crop pests, and their population trajectories in field crops are characterized by rapid boom and bust, under the influence of bottom up (host plant) and top down (natural enemy) forces. Theoretical development in aphid growth trajectory modeling has recently advanced quite significantly, and the logistic and normal probability density functions have been found to provide analytical solutions to mechanistic models of the aphid population growth dynamics. The logistic or hyperbolic secant squared model captures a growth trajectory shaped by negative feedback of the aphid population on itself, due to the accumulation of adverse …

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Statistical Issues In The Normalizationof Multi-Species Microarray Data, John R. Stevens, Balasubramanian Ganesan, Prerak Desai, Sweta Rajan, Bart C. Weimer Apr 2008

Statistical Issues In The Normalizationof Multi-Species Microarray Data, John R. Stevens, Balasubramanian Ganesan, Prerak Desai, Sweta Rajan, Bart C. Weimer

Conference on Applied Statistics in Agriculture

Several species of bacteria are involved in the production of cheese, including Lactobacillus brevis and Lactococcus lactis. A custom-designed Affymetrix microarray was recently developed to study gene expression in three organisms on a single chip. This array contains only perfect match features for the coding and non-coding regions in the genomes of all three sequences. The multi-species nature of this array version raises interesting questions regarding the preprocessing or normalization strategies for the analysis of gene expression data. We present and evaluate several possible strategies using both cDNA dilution data and experimental expression data from a repeated measures design. The …

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Multi-Trait Qtl Mapping Using A Structural Equation Model, Xiaojuan Mi, Kent M. Eskridge, Dong Wang Apr 2008

Multi-Trait Qtl Mapping Using A Structural Equation Model, Xiaojuan Mi, Kent M. Eskridge, Dong Wang

Conference on Applied Statistics in Agriculture

Research on mapping quantitative trait loci (QTL) often results in data on a number of traits that have well established causal relationships. Many multi-trait QTL mapping methods, taking into account the correlation among the multiple traits, have been developed to improve the statistical power of the test for QTL and the precision of parameter estimation. However none of these methods are capable of incorporating the causal structure among the traits with the consequence that genetic functions of the QTL may not be fully understood. Structural equation modeling (SEM) allows researchers to explicitly characterize the causal structure among the variables and …

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Dynamic Clustering Of Cell-Cycle Microarray Data, Lingling An, R. W. Doerge Apr 2008

Dynamic Clustering Of Cell-Cycle Microarray Data, Lingling An, R. W. Doerge

Conference on Applied Statistics in Agriculture

The cell cycle is a crucial series of events that are repeated over time, allowing the cell to grow, duplicate, and split. Cell-cycle systems play an important role in cancer and other biological processes. Using gene expression data gained from microarray technology it is possible to group or cluster genes that are involved in the cell-cycle for the purpose of exploring their functional co-regulation. Typically, the goal of clustering methods as applied to gene expression data is to place genes with similar expression patterns or profiles into the same group or cluster for the purpose of inferring the function of …

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Testing Variance Components By Two Jackknife Methods, Jixiang Wu, Johnie N. Jenkins, Jack C. Mccarty Apr 2008

Testing Variance Components By Two Jackknife Methods, Jixiang Wu, Johnie N. Jenkins, Jack C. Mccarty

Conference on Applied Statistics in Agriculture

The jackknife method, a resampling technique, has been widely used for statistical tests for years. The pseudo value based jackknife method (defined as pseudo jackknife method) is commonly used to reduce the bias for an estimate; however, sometimes it could result in large variation for an estimate and thus reduce the power for parameters of interest. In this study, a non-pseudo value based jackknife method (defined as non-pseudo jackknife method) was used for testing variance components under mixed linear models. We compared this non-pseudo value based jackknife method and the pseudo value based method by simulation regarding their biases, Type …

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Editor's Preface And Table Of Contents, Gary L. Gadbury Apr 2008

Editor's Preface And Table Of Contents, Gary L. Gadbury

Conference on Applied Statistics in Agriculture

These proceedings contain papers presented in the twentieth annual Kansas State University Conference on Applied Statistics in Agriculture, held in Manhattan, Kansas, April 27- April 29, 2008.

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Packaging Atmospheres And Injection Enhancement Affect Beef Tenderness And Sensory Traits, J.P. Grobbel, Michael E. Dikeman, George A. Milliken, Melvin C. Hunt Jan 2008

Packaging Atmospheres And Injection Enhancement Affect Beef Tenderness And Sensory Traits, J.P. Grobbel, Michael E. Dikeman, George A. Milliken, Melvin C. Hunt

Kansas Agricultural Experiment Station Research Reports

Case-ready meat provides many benefits, including quality and safety. Meat packaged in high-oxygen (HiO2) modified atmosphere packaging (MAP) has a desirable bright red display color but may have increased off- flavors and decreased tenderness. According to several international research reports, steaks aged and packaged in HiO2 MAP had more off-flavor, including warmed-over flavor, and were less tender and juicy than steaks aged in vacuum packaging (VP). Research at Kansas State University found that injection-enhanced beef quadriceps muscles packaged in HiO2 MAP were less tender and had more offflavors than those in ultra-low oxygen MAP. Detrimental effects of O2 on tenderness …

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Variation In Chemical Composition Of Soybean Hulls (2008), F F. Barbosa, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2008

Variation In Chemical Composition Of Soybean Hulls (2008), F F. Barbosa, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

The objective of this study was to examine the variation in chemical composition of soybean hulls. Our goal was to develop regression equations characterizing the nutritive value of soybean hulls for use in swine diets. Samples (n = 39) were collected from different processing plants across the United States and analyzed for CP, GE, crude fiber (CF), ADF, NDF, fat, ash, Ca, P, and essential amino acids. One sample was excluded from these results because it contained approximately 10 times the amount of Ca (5.2% vs. a mean of 0.57%) as other samples. The results of chemical analysis of the …

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Effects Of Different Feeding Regimens On Growth, Longevity, And Semen Characteristics Of Working Boars In A Commercial Ai Stud (2008), R C. Sulabo, J Quackenbush, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz Jan 2008

Effects Of Different Feeding Regimens On Growth, Longevity, And Semen Characteristics Of Working Boars In A Commercial Ai Stud (2008), R C. Sulabo, J Quackenbush, Robert D. Goodband, Michael D. Tokach, Joel M. Derouchey, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

The objective of the study was to determine the effects of 2 different feeding regimens on growth performance, semen production and quality, and longevity of boars in a commercial AI stud. A total of 30 replacement boars (PIC TR4, 375 lb and 14.2 mo of age) were randomly selected and allotted to 1 of 2 treatments. The control feeding program was the normal feeding program of the stud; boars were fed 6.7 lb/d for the first 8 wk, and then feeding was adjusted according to body condition of the individual boar. For the treatment feeding program, boars were fed 5.8 …

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Effects Of Adding Enzymes To Diets With Corn- And Sorghum-Based Dried Distillers Grains With Solubles On Growth Performance And Nutrient Digestibility In Nursery And Finishing Pigs (2008), C Feoli, Terry L. Gugle, S D. Carter, N A. Cole, Joe D. Hancock Jan 2008

Effects Of Adding Enzymes To Diets With Corn- And Sorghum-Based Dried Distillers Grains With Solubles On Growth Performance And Nutrient Digestibility In Nursery And Finishing Pigs (2008), C Feoli, Terry L. Gugle, S D. Carter, N A. Cole, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effects of added enzymes on the nutritional value of diets with corn- and sorghum-based dried distillers grains with solubles (DDGS). For Exp. 1, 180 weanling pigs (initially 16.6 lb) were fed the same starter diet for 10 d and then used in a 27-d growth assay. There were 6 pigs per pen and 6 pens per treatment. Treatments were a corn-soybean meal-based control and diets with 30% corn-based (Hudson, SD) and sorghum-based (Russell, KS) DDGS with and without enzymes (a cocktail of β-glucanase, protease, amylase, and xylanase to supply 331, 1,102, 2,205, and …

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Effects Of Excess Dietary Crude Protein From Soybean Meal And Dried Distillers Grains With Solubles In Diets For Finishing Pigs (2008), S M. Williams, C Feoli, S Issa, Terry L. Gugle, Joe D. Hancock Jan 2008

Effects Of Excess Dietary Crude Protein From Soybean Meal And Dried Distillers Grains With Solubles In Diets For Finishing Pigs (2008), S M. Williams, C Feoli, S Issa, Terry L. Gugle, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

A total of 180 pigs (90 barrows and 90 gilts, average initial weight of 148 lb) were used in a 67-d experiment to determine the effects of excess dietary CP on growth performance and carcass measurements in finishing pigs. The pigs were sorted by ancestry and blocked by weight with 12 pigs per pen and 5 pens per treatment. Treatments were corn-soybean meal-based diets formulated to 15.3 and 18.3% CP and a corn-soybean-DDGS-based diet formulated to 18.3% CP. Feed and water were consumed on an ad libitum basis until the pigs were slaughtered (average final weight of 282 lb) at …

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Evaluation Of Deoiled Corn Dried Distillers Grains With Solubles (Solvent Extracted) On Growth Performance Of Nursery Pigs (2008), J Y. Jacela, L Brandts, R C. Thaler, D Peters, D E. Little, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2008

Evaluation Of Deoiled Corn Dried Distillers Grains With Solubles (Solvent Extracted) On Growth Performance Of Nursery Pigs (2008), J Y. Jacela, L Brandts, R C. Thaler, D Peters, D E. Little, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 210 pigs (initially 22.0 lb) were used in a 28-d study to evaluate the effects of increasing deoiled corn dried distillers grains with solubles, solvent extracted (dDGS) on nursery pig growth performance. Pigs were blocked on the basis of pen weight and randomly allotted to 1 of 5 dietary treatments containing 0, 5, 10, 20, or 30% dDGS. There were 7 pens per treatment and 6 pigs per pen. All diets were formulated to equivalent ME and standardized ileal digestible lysine concentrations. Soybean oil was added to the dDGS diets as an energy source to equalize dietary …

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Effects Of Pepsoygen And Dried Porcine Solubles 50 In Nursery Pig Diets (2008), C K. Jones, Joel M. Derouchey, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz Jan 2008

Effects Of Pepsoygen And Dried Porcine Solubles 50 In Nursery Pig Diets (2008), C K. Jones, Joel M. Derouchey, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to evaluate the effects of dietary specialty protein source on weanling pig growth performance. In Exp. 1, 350 pigs (initially 13.4 lb) were used in a 35-d growth trial to compare the effects of fish meal, PepSoyGen, and dried porcine solubles (DPS 50) on weanling pig performance. Seven dietary treatments were fed: (1) negative control, (2) 3% fish meal, (3) 6% fish meal, (4) 3.75% PepSoyGen, (5) 7.50% PepSoyGen, (6) 1.88% PepSoyGen and 1.88% DPS 50, and (7) 3.75% PepSoyGen and 3.75% DPS 50. From d 0 to 14, pigs fed increasing PepSoyGen and PepSoyGen in …

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Effects Of Morinda Citrifolia (Noni) And Diet Complexity On Growth Performance In Weanling Pigs (2008), C Feoli, Joe D. Hancock, Keith C. Behnke Jan 2008

Effects Of Morinda Citrifolia (Noni) And Diet Complexity On Growth Performance In Weanling Pigs (2008), C Feoli, Joe D. Hancock, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effects of concentration (0, 0.75, 1.5, 3.0, and 6.0%) of Morinda citrifolia (no-ni; Morinda Agricultural Products, Orem, UT) and diet complexity in weanling pigs. In Exp. 1, 210 pigs (initially 13.4 lb) were used in a 35-d growth assay; there were 7 pigs per pen and 6 pens per treatment. Diets were corn-soybean meal-based, and lysine concentrations were 1.8% for d 0 to 7, 1.6% for d 7 to 21, and 1.4% for d 21 to 35 with feed and water con-sumed on an ad libitum basis. Increasing the concentration of noni in …

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Effect Of Deoiled Corn Dried Distillers Grains With Solubles (Solvent Extracted) On Growth Performance, Carcass Characteristics, And Carcass Fat Quality Of Growing And Finishing Pigs (2008), J Y. Jacela, K J. Prusa, R C. Thaler, D E. Little, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2008

Effect Of Deoiled Corn Dried Distillers Grains With Solubles (Solvent Extracted) On Growth Performance, Carcass Characteristics, And Carcass Fat Quality Of Growing And Finishing Pigs (2008), J Y. Jacela, K J. Prusa, R C. Thaler, D E. Little, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,215 pigs (initially 65.2 lb) were used in a 99-d study to determine the effects of deoiled corn dried distillers grains with solubles, solvent extracted (dDGS) on growing and finishing pig growth performance, carcass characteristics, and carcass fat quality. Pigs were blocked on the basis of pen weight and randomly allotted to 1 of 5 dietary treatments containing either 0, 5, 10, 20, or 30% dDGS. Pigs were fed in 4 phases; all dietary treatments were formulated to similar dietary ME and standardized ileal digestible (SID) lysine concentrations within each phase. Choice white grease (CWG) was included …

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Length Of The Weaning Period Does Not Affect Post-Weaning Growth Or Health Of Lightweight Summer-Weaned Beef Calves (2008), J.W. Bolte, K. C. Olson, Bradley J. White, Robert L. Larson, George A. Milliken, N.A. Sproul, M.D. Thomas, John R. Jaeger, Daniel U. Thomson Jan 2008

Length Of The Weaning Period Does Not Affect Post-Weaning Growth Or Health Of Lightweight Summer-Weaned Beef Calves (2008), J.W. Bolte, K. C. Olson, Bradley J. White, Robert L. Larson, George A. Milliken, N.A. Sproul, M.D. Thomas, John R. Jaeger, Daniel U. Thomson

Kansas Agricultural Experiment Station Research Reports

Bovine respiratory disease (BRD) is the most economically devastating feedlot disease. Risk factors associated with incidence of BRD include: 1) stress associated with maternal separation; 2) stress associated with introduction to an unfamiliar environment; 3) low feed intake associated with the introduction of novel feedstuffs into the diet; 4) exposure to novel pathogens upon transport to a feeding facility and commingling with unfamiliar cattle; and 5) inappropriately administered respiratory disease vaccination programs. Management practices collectively referred to as preconditioning are thought to minimize carcass damage resulting from BRD. Preconditioning management attempts to eliminate or reduce risk factors for respiratory disease …

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Use Of Dried Distillers Grains With Solubles And Soybean Hulls In Nursery Pig Diets (2008), F F. Barbosa, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2008

Use Of Dried Distillers Grains With Solubles And Soybean Hulls In Nursery Pig Diets (2008), F F. Barbosa, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 3,186 pigs were used in two 21-d experiments to evaluate growth performance of nursery pigs fed different levels of dried distillers grains with soluble (DDGS) or soybean hulls. In each experiment, pigs (n = 1,593, and 24.0 lb in Exp. 1 and n = 1,593, and 27.3 lb in Exp. 2) were allotted to 72 pens (36 pens of barrows and 36 pens of gilts) with 21 or 22 pigs per pen on d 21 after weaning. A pen of barrows and pen of gilts shared a common feeder; thus, feeder was the experimental unit. In Exp. …

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Genetic Background Influences Pig Growth Rate Responses To Porcine Circovirus Type 2 (Pcv2) Vaccines (2008), M L. Potter, Lisa M. Tokach, Steven C. Henry, Joel M. Derouchey, Michael D. Tokach, Raymond R. Rowland R, Richard D. Oberst, Richard A. Hesse, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2008

Genetic Background Influences Pig Growth Rate Responses To Porcine Circovirus Type 2 (Pcv2) Vaccines (2008), M L. Potter, Lisa M. Tokach, Steven C. Henry, Joel M. Derouchey, Michael D. Tokach, Raymond R. Rowland R, Richard D. Oberst, Richard A. Hesse, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 454 pigs (21 d of age, 13.4 lb) were used in a 130-d field study to investigate porcine circovirus type 2 (PCV2) vaccine effects on growth performance of boars and gilts of 4 different genetic backgrounds: A×A (Duroc-based sire and dam), B×B (synthetic line sire and dam lines derived from Duroc, Pie-train, and Large White), A×B, and B×A. Pigs were identified as potential test pigs at birth and ear tagged for identification. Characteristics including litter, genetic background, gender, and birth weight were recorded and used in allotting PCV2 vaccine treatment groups. Pigs were vaccinated according to label …

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Effects Of Increasing Standardized Ileal Digestible Lysine:Calorie Ratio For 120- To 180-Lb Gilts Grown In A Commercial Finishing Environment (2008), N W. Shelton, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2008

Effects Of Increasing Standardized Ileal Digestible Lysine:Calorie Ratio For 120- To 180-Lb Gilts Grown In A Commercial Finishing Environment (2008), N W. Shelton, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A 28-d growth trial was conducted to estimate the lysine requirement for 120- to 180-lb gilts. A total of 1,092 gilts (initially 121.7 lb, PIC 337 × 1050) were allotted to treatment diets with standardized ileal digestible (SID) lysine/ME ratios of 1.89, 2.12, 2.35, 2.58, 2.81, and 3.04 g/Mcal. All diets contained 0.15% L-lysine HCl and 3% choice white grease and were formulated to meet or exceed all other requirements. Seven replicate pens per treatment were used; there were approximately 26 pigs per pen. Gilts were vaccinated with 2 doses of commercial porcine circo virus type 2 (PCV2) vaccine while …

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Effects Of Increasing Glycerol And Dried Distillers Grains With Solubles On The Growth Performance And Carcass Characteristics Of Finishing Pigs (2008), A W. Duttlinger, J M. Benz, Terry A. Houser, Michael D. Tokach, Steven S. Dritz, K J. Prusa, Joel M. Derouchey, Jim L. Nelssen, Robert D. Goodband Jan 2008

Effects Of Increasing Glycerol And Dried Distillers Grains With Solubles On The Growth Performance And Carcass Characteristics Of Finishing Pigs (2008), A W. Duttlinger, J M. Benz, Terry A. Houser, Michael D. Tokach, Steven S. Dritz, K J. Prusa, Joel M. Derouchey, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

A total of 1,160 barrows (PIC, initially 68.4 lb) were used in a 97-d study to determine the influence of glycerol and dried distillers grains with solubles (DDGS) on growing-finishing pig performance, carcass characteristics, and fat quality. Pigs were blocked by weight and randomly allotted to 1 of 6 dietary treatments with 7 replications per treatment. Pigs were fed corn-soybean meal-based diets arranged in a 2 × 3 factorial with main effects of glycerol (0, 2.5, or 5%) and DDGS (0 or 20%). Overall (d 0 to 97), there were no glycerol × DDGS interactions (P>0.12) for growth performance, …

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Effects Of Dried Distillers Grains With Solubles On Sow Carcass Fat Quality (2008), Terry A. Houser, A N. Gipe, B L. Goehring, S L. Hillyard, A W. Duttlinger, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2008

Effects Of Dried Distillers Grains With Solubles On Sow Carcass Fat Quality (2008), Terry A. Houser, A N. Gipe, B L. Goehring, S L. Hillyard, A W. Duttlinger, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A pilot experiment was conducted to determine the effects of feeding nonpregnant (open) sows a diet containing 50% dried distillers grains with solubles (DDGS) on growth and carcass fat quality. A total of 8 open sows were allotted to 1 of 2 diets by parity and BW. One diet was a standard corn-soybean meal-based gestation diet; the second diet was a corn-soybean meal-based diet that contained 50% DDGS. All sows were fed 5 lb/d of feed in a single feeding for 92 d. All sows were harvested on d 92 at the Kansas State University Meat Laboratory for determination of …

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Effects Of 200 Ppb Added Chromium From Chromium Propionate On The Growth Performance And Carcass Characteristics Of Finishing Pigs (2008), J R. Bergstrom, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz Jan 2008

Effects Of 200 Ppb Added Chromium From Chromium Propionate On The Growth Performance And Carcass Characteristics Of Finishing Pigs (2008), J R. Bergstrom, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,207 pigs (PIC 337 × 1050) were used in a 103-d experiment in a commercial research barn to evaluate the growth performance and carcass characteristics of finishing pigs fed 200 ppb chromium propionate. There were 22 replicate pens per treatment with 25 to 28 pigs per pen for the evaluation of chromium propionate from d 0 to 84 and 11 replicates per treatment for evaluating chromium propionate (0 and 200 ppb) and Paylean (0 and 9 g/ton) in a split-plot arrangement from d 84 to 103. Pigs were weighed (avg. 67.7 lb) and randomly allotted to 2 …

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Amino Acid Digestibility Of High-Protein Corn Dried Distillers Grains With Solubles In Pigs (2008), J Y. Jacela, H L. Frobose, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2008

Amino Acid Digestibility Of High-Protein Corn Dried Distillers Grains With Solubles In Pigs (2008), J Y. Jacela, H L. Frobose, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

The objective of this experiment was to determine the digestibility of amino acids (AA) in a high-protein dried distillers grains with solubles (DDGS) product. Six growing barrows (initially 50 lb) were surgically fitted with a T-cannula at the terminal ileum to allow for ileal digesta collection. After recovery, the pigs were randomly allotted to 2 dietary treatments in a crossover design with 2 periods. The first diet contained high-protein DDGS (67% of the diet) as the sole protein source; the second was a nitrogen-free diet for determining basal endogenous AA loss. Chromic oxide was added to both diets as an …

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Digestibility Of Dried Distiller’S Grains With Solubles In Steam-Flaked Or Dry-Rolled Corn Diets (2008), M.L. May, M.J. Hands, M.J. Quinn, J.O. Wallace, Leigh W. Murray, Christopher D. Reinhardt, James S. Drouillard Jan 2008

Digestibility Of Dried Distiller’S Grains With Solubles In Steam-Flaked Or Dry-Rolled Corn Diets (2008), M.L. May, M.J. Hands, M.J. Quinn, J.O. Wallace, Leigh W. Murray, Christopher D. Reinhardt, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

In previous experiments, we observed that the nutritional value of dried distiller's grains is less when added to finishing diets made of steam-flaked corn than when added to diets of dry-rolled corn. We hypothesized that effects of grain processing on value of distiller's grains are attributable to differences in the digestion characteristics of grains processed via flaking or dry rolling. In this study, our objective was to evaluate differences in ruminal metabolism and total tract digestion of diets made from dry-rolled or steam-flaked corn with and without dried distiller's grains.

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