Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Kansas State University Libraries

2008

Discipline
Keyword
Publication
Publication Type

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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.

Go to article

Vitamin A Restriction During Finishing Benefits Beef Retail Color Display Life (2008), M.J. Daniel, A.M. Arnett, Michael E. Dikeman Jan 2008

Vitamin A Restriction During Finishing Benefits Beef Retail Color Display Life (2008), M.J. Daniel, A.M. Arnett, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Because the beef industry commonly uses marbling as an indicator of meat palatability, determining the most cost effective methods of increasing quality grade in cattle is a high priority. Previous research showed that weaning calves at around 90 instead of 200 days of age can be beneficial in reducing cow production costs and increasing marbling in feedlot steers. Other studies demonstrated that high levels of vitamin A inhibit development of intramuscular fat. Vitamin A restriction is used commonly in Japanese cattle to increase marbling scores; this stimulated interest in applying this restriction in U.S. beef production systems. However, little research …

Go to article

Prepartum Supplementation Influences Response To Timed Artificial Insemination By Suckled Mature Beef Cows (2008), M.D. Thomas, Jeffrey S. Stevenson, J.W. Bolte, N.A. Sproul, D.A. Linden, K. C. Olson, John R. Jaeger Jan 2008

Prepartum Supplementation Influences Response To Timed Artificial Insemination By Suckled Mature Beef Cows (2008), M.D. Thomas, Jeffrey S. Stevenson, J.W. Bolte, N.A. Sproul, D.A. Linden, K. C. Olson, John R. Jaeger

Kansas Agricultural Experiment Station Research Reports

Fat supplementation before calving (i.e., prepartum) can alter reproductive performance of beef cows. These effects do not seem to be related to energy or protein content of the supplement. Chemical structures of some plant fats are similar to chemical structures of certain reproductive hormones; moreover, some fats are precursors to prostaglandin production. Prepartum vegetable fat supplementation has been associated with improved reproductive performance by cows and heifers managed for artificial insemination (AI) breeding. The biological basis for this effect is not clearly understood but is believed to reflect the influence of fat supplements on cyclicity, body weight, body condition, and …

Go to article

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 …

Go to article

Effect Of Zilpaterol-Hcl (Zilmax) On Implanted And Non-Implanted Feedlot Steer Performance And Carcass Characteristics (2008), T.J. Baxa, J.P. Hutcheson, M.F. Miller, W.T. Nichols, M.N. Streeter, D.A. Yates, B.J. Johnson Jan 2008

Effect Of Zilpaterol-Hcl (Zilmax) On Implanted And Non-Implanted Feedlot Steer Performance And Carcass Characteristics (2008), T.J. Baxa, J.P. Hutcheson, M.F. Miller, W.T. Nichols, M.N. Streeter, D.A. Yates, B.J. Johnson

Kansas Agricultural Experiment Station Research Reports

Zilpaterol-HCl (Zilmax) is a β2-adrenergic receptor agonist approved as a growth promotant in feedlot cattle for use during the last 20 to 40 days prior to harvest. It is orally active and improves performance and total body lean tissue. The recommended dosage is 7.6 grams per ton of feed on a 100% dry matter basis. Steroidal implants are used in feedlot animals to improve average daily gain, feed efficiency, and total lean tissue deposition. Little is known about how Zilmax and steroidal implants influence growth performance when used in combination. Our objective was to evaluate performance of steers administered Zilmax …

Go to article

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 …

Go to article

Effects Of Glycerol And Ractopamine Hcl (Paylean) On Growth Performance, Carcass Characteristics, And Loin Quality Of Finishing Pigs (2008), A W. Duttlinger, Michael D. Tokach, Steven S. Dritz, Terry A. Houser, K J. Prusa, Joel M. Derouchey, Jim L. Nelssen, Robert D. Goodband Jan 2008

Effects Of Glycerol And Ractopamine Hcl (Paylean) On Growth Performance, Carcass Characteristics, And Loin Quality Of Finishing Pigs (2008), A W. Duttlinger, Michael D. Tokach, Steven S. Dritz, Terry A. Houser, K J. Prusa, Joel M. Derouchey, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

A total of 1,054 barrows and gilts (PIC, initially 207.8 lb) were used in a 28-d study to determine the influence of glycerol and ractopamine HCl (Paylean) on growing-finishing pig performance, carcass characteristics, and loin quality. The experiment was conducted in a commercial swine research facility in southwest Minnesota. Pigs were blocked by weight and randomly allotted to 1 of 4 dietary treatments with 10 replications per treatment. Pigs were fed corn-soybean meal-based diets. Dietary treatments were arranged in a 2 × 2 factorial with main effects of glycerol (0 or 5%) and ractopamine HCl (0 or 6.75 g/ton). Overall …

Go to article

Effects Of Feeding Excess Crude Protein On Growth Performance And Carcass Traits Of Finishing Pigs (2008), S M. Williams, C Feoli, S Issa, Terry L. Gugle, Joe D. Hancock Jan 2008

Effects Of Feeding Excess Crude Protein On Growth Performance And Carcass Traits Of 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 176 pigs (88 barrows and 88 gilts, average initial BW of 209 lb) were used in a 33-d experiment to determine the effects of excess dietary CP on growth performance and carcass measurements of finishing pigs. Pigs were sorted by sex and ancestry and blocked by weight with 11 pigs per pen and 4 pens per treatment. Treatments were corn-soybean meal based and formulated to a minimum of 0.80% total lysine but with 12, 14, 16, and 18% CP. Feed and water were consumed on an ad libitum basis until pigs were slaughtered (average final BW of …

Go to article

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 …

Go to article

Effects Of Expander Conditioning On The Nutritional Value Of Diets With Dried Distillers Grains With Solubles In Nursery And Finishing Pigs (2008), C Feoli, Terry L. Gugle, S D. Carter, Joe D. Hancock, Keith C. Behnke Jan 2008

Effects Of Expander Conditioning On The Nutritional Value Of Diets With Dried Distillers Grains With Solubles In Nursery And Finishing Pigs (2008), C Feoli, Terry L. Gugle, S D. Carter, Joe D. Hancock, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

Three experiments were conducted to determine the effects of expander conditioning on nutritional value of diets without and with corn- and sorghum-based dried distillers grains with solubles (DDGS). In Exp. 1, 180 nursery pigs (average weight 29 lb) were assigned to 30 pens. Treatments were arranged as a 3 × 2 factorial with main effects of diet formulation (corn-soybean meal vs. 30% corn- or sorghum-based DDGS) and conditioning (standard steam vs. expander) prior to pelleting. Pigs fed corn-soybean meal diets had better (P<0.005) ADG, F/G, and digestibility of DM, N, and GE than pigs fed diets with DDGS. Diets with corn-based DDGS supported better (P<0.03) ADG, F/G, and digestibility of DM and N than diets with sorghum-based DDGS. Expander processing improved (P<0.009) ADG, F/G, and digestibility of DM, N, and GE compared with standard conditioning. Pigs fed diets with sorghum-based DDGS showed the greatest response in F/G to expander conditioning leading to a DDGS source × conditioning interaction (P<0.008). In Exp. 2, 176 finishing pigs (average weight 164 lb) were assigned to 16 pens. Treatments were arranged as a 2 × 2 factorial with main effects of diet formulation (corn-soybean meal vs. 40% sorghum-based DDGS) and conditioning (standard steam vs. ex-pander) prior to pelleting. Net electrical energy required for feed processing was lower (P<0.001) and production rate was greater (P<0.005) for the corn-soybean meal diets than for diets with DDGS. However, pellet durability was improved (P<0.001) by addition of DDGS to the diets. Pigs fed corn-soybean meal diets had better (P<0.03) overall ADG and F/G than pigs fed diets with DDGS. Expander conditioning did not affect ADG (P>0.83) but improved overall F/G and dressing percentage (P<0.007). In Exp. 3, 192 finishing pigs (average weight 222 lb) were assigned to 16 pens to determine nutrient digestibility. Treatments were the same as in Exp. 2. Feed and water was consumed ad libitum during a 6-d adjustment period; then, feces were collected for 2 d. Corn-soybean meal diets had greater (P<0.001) digestibility of DM, N, and GE than diets with DDGS, and expander conditioning improved (P<0.02) digestibility of DM, N, and GE compared with standard conditioning. However, the improved digestibility of DM with expander conditioning was apparent primarily for the DDGS diets (diet × conditioning interaction, P<0.01). In conclusion, expanding diets improved ADG, F/G, and nutrient digestibility in nursery pigs and F/G, dressing percentage, and nutrient digestibility in finishing pigs fed diets without and with DDGS.; Swine Day, 2008, Kansas State University, Manhattan, KS, 2008

Go to article

Effects Of Copper Sulfate, Tri-Basic Copper Chloride, And Zinc Oxide On Weanling Pig Growth And Plasma Mineral Concentrations (2008), N W. Shelton, Jim L. Nelssen, G M. Hill, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2008

Effects Of Copper Sulfate, Tri-Basic Copper Chloride, And Zinc Oxide On Weanling Pig Growth And Plasma Mineral Concentrations (2008), N W. Shelton, Jim L. Nelssen, G M. Hill, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two 28-d experiments were conducted to determine the effects of increasing dietary zinc and copper levels on weanling pig performance. In each experiment, 180 weanling pigs (PIC, 21 d of age, 12.5 lb in Exp. 1 and 13.2 lb in Exp. 2) were allotted to 1 of 6 treatments with 5 and 6 replications in Exp. 1 and 2, respectively. Diets were fed in 2 phases (d 0 to 14 and 14 to 28), and the trace mineral premix provided 165 ppm zinc and 16.5 ppm copper to all diets. In Exp. 1, treatments were arranged as a 2 × …

Go to article

Diet Preference And Growth Performance In Weanling Pigs Fed Diets With Morinda Citrifolia (Noni) (2008), C Feoli, Joe D. Hancock, Keith C. Behnke Jan 2008

Diet Preference And Growth Performance In Weanling Pigs Fed Diets With Morinda Citrifolia (Noni) (2008), C Feoli, Joe D. Hancock, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effects of adding 5% Morinda citrifolia (noni; Morinda Agricultural Products, Orem, UT) to diets for weanling pigs. In Exp. 1, 48 pigs (initially 9.3 lb) were used in a 29-d preference study. There were 6 pigs per pen and 8 pens total. The pens were equipped with 2 identical feeders (for diets without and with noni puree), and position of the feeders was switched each afternoon to prevent feeder location from affecting diet consumption. The diets were corn-soybean meal-based, pelleted, and had 1.8% lysine for d 0 to 5, 1.6% lysine for d …

Go to article

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 …

Go to article

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 …

Go to article

Determining The Accuracy Of Gestation Feed Drops (2008), J D. Schneider, Michael D. Tokach, Steven S. Dritz, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband Jan 2008

Determining The Accuracy Of Gestation Feed Drops (2008), J D. Schneider, Michael D. Tokach, Steven S. Dritz, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Objective: To determine the accuracy of three different types of gestation feed drops. Materials and methods: Econo, Accu, and Ultra feed drops (Automated Production Systems, Assumption, Illinois) were attached to feed lines at three angles (90Ëš, 75Ëš, and 60Ëš). Feed was collected and weighed at settings of 2, 4, 6, 8, and 10 lb (0.9, 1.8, 2.7, 3.6, and 4.65 kg) for the Econo and Accu feed drops and 2, 4, 6, and 8 lb for the Ultra feed drops. Results: There was a drop type × angle × feed level interaction (P<.01) for the feed settings versus the actual amount dropped. At 90Ëš, the relationship between the feeder setting (x) and actual quantity of feed dropped was best described by the regression equation (1.156x + 0.244) for the Econo, (1.010x + 0.072) for the Accu, and (1.009x + 0.231) for the Ultra feed drops. At 75Ëš, the regression equations were (1.014x — 0.139) for the Econo, (0.997x + 0.057) for the Accu, and (1.005x + 0.156) for the Ultra feed drops. At 60Ëš, the regression equations were (0.689x — 0.076) for the Econo, (0.989x — 0.249) for the Accu, and (0.951x + 0.026) for the Ultra feed drops. Implications: The type of feed drop and its angle relative to the feed line influences the amount of feed dispensed at a feeder setting. The Accu and Ultra feed drops more accurately dispense the correct amount of feed than the Econo feed drops.; Journal of Swine Health and Production; 16; Swine Day, 2008, Kansas State University, Manhattan, KS, 2008

Go to article

Southwest Research-Extension Center, Field Day 2008 Jan 2008

Southwest Research-Extension Center, Field Day 2008

Kansas Agricultural Experiment Station Research Reports

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

Go to article

Antimicrobial Ingredients Affect Beef Snack Stick Quality (2008), A.L. Mayer, J.A. Gunderson, A.S. Lobaton-Sulabo, Elizabeth A.E. Boyle, Terry A. Houser, James J. Higgins Jan 2008

Antimicrobial Ingredients Affect Beef Snack Stick Quality (2008), A.L. Mayer, J.A. Gunderson, A.S. Lobaton-Sulabo, Elizabeth A.E. Boyle, Terry A. Houser, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

The Centers for Disease Control and Pre- vention estimate that 2,500 people become infected with listerosis each year by consuming food containing Listeria monocytogenes. Certain ready-to-eat meat and poultry products, particularly deli meats and hot dogs, are considered high risk products based on a Listeria risk assessment performed by the Centers for Disease Control and Prevention, the U.S. Food and Drug Administration, and the U.S. Department of Agriculture Food Safety and Inspection Service. Meat and poultry processors use various strategies to minimize L. monocytogenes contamination in ready-to-eat products; one strategy is inclusion of antimicrobial ingredients. Meat snacks, including snack sticks, …

Go to article

Heifers Sired By Bulls With Low Residual Feed Intake Estimated Breeding Values Have Lower Residual Feed Intake Than Heifers Sired By Bulls With High Residual Feed Intake Estimated Breeding Values (2008), J. Minick Bormann, Daniel W. Moser, T.T. Marston Jan 2008

Heifers Sired By Bulls With Low Residual Feed Intake Estimated Breeding Values Have Lower Residual Feed Intake Than Heifers Sired By Bulls With High Residual Feed Intake Estimated Breeding Values (2008), J. Minick Bormann, Daniel W. Moser, T.T. Marston

Kansas Agricultural Experiment Station Research Reports

Feed is one of the largest costs in a cow/calf or feedlot operation. However, very little data is available to aid producers in genetically improving their herd for feed efficiency. In Australia, bull tests record individual feed intakes, which are used to calculate Estimated Breeding Values (EBV) (analogous to EPD) for residual feed intake (RFI). Residual feed intake measures the degree to which feed intake deviates from expected levels based on the animal size and rate of gain. Negative values are good; they indicate the animal ate less than expected for its size and growth rate. Our objective was to …

Go to article

Distiller’S Grain Market Price Relationships, Discovery, And Risk Management (2008), T.W. Van Winkle, Ted C. Schroeder Jan 2008

Distiller’S Grain Market Price Relationships, Discovery, And Risk Management (2008), T.W. Van Winkle, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

The substantial increase in corn use by the ethanol refinery industry (Figure 1) has resulted in livestock producers, especially cattle feeders, substituting distiller's grain (DG) for corn in feed rations. DG futures markets do not exist, but actively traded corn and soybean meal (SBM) futures are the most probable markets for hedging DG price risk. Therefore, the ability to offset DG price risk using corn and SBM futures is incorporated into analysis to quantify the strength of price relationships. If DG prices and corn or SBM futures prices are strongly related, then a viable cross hedging opportunity might exist. If …

Go to article

Next Last