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- 2011; Kansas Agricultural Experiment Station contribution; no. 12-064-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1056; Swine; Amino acid ratio; DDGS; Lysine; Tryptophan; Finishing pig (1)
- 2011; Kansas Agricultural Experiment Station contribution; no. 12-064-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1056; Swine; Amino acid ratio; Lysine; Tryptophan; Nursery pig (1)
- 2011; Kansas Agricultural Experiment Station contribution; no. 12-064-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1056; Swine; Amino acids; Large neutral amino acids; Lysine; Tryptophan; Finishing pig (1)
- 2011; Kansas Agricultural Experiment Station contribution; no. 12-064-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1056; Swine; Astaxanthin; Carcass characteristics; Finishing pig; Pork color; Ractopamine HCl (1)
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Articles 1 - 30 of 89
Full-Text Articles in Life Sciences
Estimating Area And Lag Associated With Thermal Hysteresis In Cattle, F. Yang, A. M. Parkhurst
Estimating Area And Lag Associated With Thermal Hysteresis In Cattle, F. Yang, A. M. Parkhurst
Conference on Applied Statistics in Agriculture
Thermal hysteresis in cattle becomes visible when the phase diagram of body temperature (Tb) vs ambient temperature (Ta) exhibits a loop. The hysteresis loop shows a rotated elliptical pattern which depends on the lag between Tb and Ta. The area of the loop can be used to quantify the amount of heat stress during thermal challenge. Three methods to estimate the area and lag of the elliptical hysteresis loop are: linear least squares method, ellipse-specific nonlinear least squares method, and Lapshin’s analytical method. Linear least squares method uses residual least squares to estimate the coefficients of the ellipse for which …
Comparison Of Linear Mixed Models For Multiple Environment Plant Breeding Trials, Carl A. Walker, Fabiano Pita, Kimberly Garland Campbell
Comparison Of Linear Mixed Models For Multiple Environment Plant Breeding Trials, Carl A. Walker, Fabiano Pita, Kimberly Garland Campbell
Conference on Applied Statistics in Agriculture
Evaluations of multiple environment trials (MET) often reveal substantial genotype by environment interactions, and the effects of genotypes within environments are often estimated using cell means, i.e. the simple mean of the observations of each genotype in each environment. However, these estimates are inaccurate, especially for unreplicated or partially replicated trials, so alternative methods of analysis are necessary. One possible approach utilizes information, often from pedigree data, about relationships among the tested genotypes through the use of a genetic relationship matrix (GRM). Predictive accuracy may also be improved by the use of factor analytic (FA) structures for environmental covariances. In …
A Hierarchical Bayesian Approach For Detecting Differential Gene Expression In Unreplicated Rna-Sequencing Data, Sanvesh Srivastava, R. W. Doerge
A Hierarchical Bayesian Approach For Detecting Differential Gene Expression In Unreplicated Rna-Sequencing Data, Sanvesh Srivastava, R. W. Doerge
Conference on Applied Statistics in Agriculture
Next-generation sequencing technologies have emerged as a promising technology in a variety of fields, including genomics, epigenomics, and transcriptomics. These technologies play an important role in understanding cell organization and functionality. Unlike data from earlier technologies (e.g., microarrays), data from next-generation sequencing technologies are highly replicable with little technical variation. One application of next-generation sequencing technologies is RNA-Sequencing (RNA-Seq). It is used for detecting differential gene expression between different biological conditions. While statistical methods for detecting differential expression in RNA-Seq data exist, one serious limitation to these methods is the absence of biological replication. At present, the high cost of …
Bootstrap Estimation And Comparison Of An Index Of Phylogenetic Correlation, William J. Price, Bahman Shafii, Carole B. Rapo, Sanford D. Eigenbrode, John Gaskin
Bootstrap Estimation And Comparison Of An Index Of Phylogenetic Correlation, William J. Price, Bahman Shafii, Carole B. Rapo, Sanford D. Eigenbrode, John Gaskin
Conference on Applied Statistics in Agriculture
A common objective of bioinformatic analyses is to assess the similarity of species, given a biological trait or characteristic. Phylogenetic correlation is one means to achieve this objective. Such measures provide a means to evaluate evolutionary models and history as well as having potential application to ecological relationships including host preference selection. Typically, these measurements are based on the deviation of an observed phylogeny from a Brownian evolutionary model. Statistical inference for this difference is assessed through likelihood ratio tests. These tests, in turn, rely on the assumption of a Normal likelihood within the phylogenetic trait. In addition, statistical comparison …
Modeling The Root-Knot Nematode/Nutsedge Pest Complex: Perspectives From Weed Science, Nematology And Statistics, Leigh Murray, Stephen H. Thomas, Jill Schroeder, Scott Kreider, Zhining Ou, J. M. Trojan, C. Fiore
Modeling The Root-Knot Nematode/Nutsedge Pest Complex: Perspectives From Weed Science, Nematology And Statistics, Leigh Murray, Stephen H. Thomas, Jill Schroeder, Scott Kreider, Zhining Ou, J. M. Trojan, C. Fiore
Conference on Applied Statistics in Agriculture
Previous research by the authors has established that southern root-knot nematode (SRKN, Meloidogyne incognita (Kofoid & White) Chitwood) and yellow and purple nutsedge (YNS, Cyperus esculentus L. and PNS, C. rotundus L.) form a pest-complex that adversely affects a wide variety of crops in the southern and western U.S. These pests appear to have co-evolved a mutually-beneficial relationship that promotes the survival of both nematodes and weeds to the detriment of crops. Traditional management has usually targeted one pest at a time, but managing this pest complex requires that all members of the complex be managed simultaneously. A series of …
Multi-Parental Mating Design Analysis: Model Evaluation And Application In Spring Wheat, M. Kadariya, K. D. Glover, J. Wu, J. L. Gonzalez
Multi-Parental Mating Design Analysis: Model Evaluation And Application In Spring Wheat, M. Kadariya, K. D. Glover, J. Wu, J. L. Gonzalez
Conference on Applied Statistics in Agriculture
Conventional quantitative genetics studies have mainly focused on bi-parental mating systems. However, genetic potential of selected individuals within a segregating population may be limited due to only two parents being used for each cross. Multiple-parental mating systems have been proposed that involve three or four diverse parents. This provides a higher potential of combining desirable genes. Due to complexity of the data structure of multi-parental mating systems, analysis of variance (ANOVA) methods are not applicable in analysis. The objective of this study is to validate and apply a mixed linear model approach, minimum norm quadratic unbiased estimation (MINQUE), to analyze …
Estimating The Subject By Treatment Interaction In Non-Replicated Crossover Diet Studies, Matthew Kramer, Shirley C. Chen, Sarah K. Gebauer, David J. Baer
Estimating The Subject By Treatment Interaction In Non-Replicated Crossover Diet Studies, Matthew Kramer, Shirley C. Chen, Sarah K. Gebauer, David J. Baer
Conference on Applied Statistics in Agriculture
Researchers in human nutrition commonly refer to the ‘consistent’ diet effect (i.e. the main effect of diet) and an ‘inconsistent’ diet effect (i.e. a subject by diet interaction). However, due to the non-replicated designs of most studies, one can only estimate the first part using ANOVA; the latter (interaction) is confounded with the residual noise. In many diet studies, it appears that subjects do respond differently to the same diet, so the subject by diet interaction may be large. In a search of over 40,000 published human nutrition studies, most using a crossover design, we found that in none was …
Probability Models To Study The Spatial Pattern, Abundance And Diversity Of Tree Species, D. M. Gowda
Probability Models To Study The Spatial Pattern, Abundance And Diversity Of Tree Species, D. M. Gowda
Conference on Applied Statistics in Agriculture
Ecological communities are composed of complex vegetation that differs from community to community and also within the community. The variability of tree species in the community in relation to their environments can be studied by using different statistical tools. The present study was conducted to describe and also to quantify the spatial pattern, abundance and diversity of tree species in the Western Ghats of Karnataka. The spatial pattern of tree species was studied by using Poisson and Negative binomial distributions. Results indicate that most of the selected tree species followed Negative binomial distribution having clumped pattern. The Species abundance distribution …
Spatio-Temporal Covariance Modeling With Some Arma Temporal Margins, Samuel Seth Demel, Juan Du
Spatio-Temporal Covariance Modeling With Some Arma Temporal Margins, Samuel Seth Demel, Juan Du
Conference on Applied Statistics in Agriculture
A valid covariance structure is needed to model spatio-temporal data in various disciplines, such as environmental science, climatology and agriculture. In this work we propose a collection of spatio-temporal functions whose discrete temporal margins are some autoregressive and moving average (ARMA) models, obtain a necessary and sufficient condition for them to be covariance functions. An asymmetric version of this model is also provided to account for space-time irreversibility property in practice. Finally, a spatio-temporal model with AR(2) discrete margin is fitted to wind data from Ireland for estimation and prediction, which are compared with some general existing parametric models in …
Logistic Regression Analysis To Determine Factors Contributing To Summer Feedlot Deaths, J. Clausen, A. M. Parkhurst, T. L. Mader
Logistic Regression Analysis To Determine Factors Contributing To Summer Feedlot Deaths, J. Clausen, A. M. Parkhurst, T. L. Mader
Conference on Applied Statistics in Agriculture
Summer heat has already been identified as a major factor for cattle deaths in the feedlot. This study attempts to assess what other factors contribute to and/or influence cattle deaths. Identifying multiple factors that contribute to summer feedlot deaths could aid feedlot managers in implementation of mitigation strategies and minimize the loss of nearly finished cattle. Daily pen, cattle, and nutritional characteristics were recorded and included in this generalized linear mixed model analysis. Cattle data were obtained from cattle pens at a single location from July 1, 2010 to July 31, 2010. Hourly weather data were acquired from this feed …
Confidence Intervals For Variance Components Using Non-Normal Distributions, Brent D. Burch
Confidence Intervals For Variance Components Using Non-Normal Distributions, Brent D. Burch
Conference on Applied Statistics in Agriculture
Simulation studies are conducted to evaluate the performance of confidence intervals for variance components under non-normal distribution assumptions. Confidence intervals based on the pivotal quantity (PQ) method and the large-sample properties of the restricted maximum likelihood (REML) estimator are considered. Of particular interest is the actual coverage value of nominal 95% confidence intervals for a ratio of variance components. In the context of unbalanced one-way random effects models, simulation results and an empirical example involving arsenic concentrations in oyster tissue suggest that the REML-based confidence interval is preferred.
Ordinary Least Squares Regression Of Ordered Categorical Data: Inferential Implications For Practice, Beth Larrabee, H. Morgan Scott, Nora M. Bello
Ordinary Least Squares Regression Of Ordered Categorical Data: Inferential Implications For Practice, Beth Larrabee, H. Morgan Scott, Nora M. Bello
Conference on Applied Statistics in Agriculture
Ordered categorical responses (OCRs) are frequently encountered in many disciplines. Examples of interest in agriculture include quality assessments, such as for soil or food products, and evaluation of lesion severity, such as teat ends status in dairy cattle. OCRs are characterized by multiple categories recorded on a ranked scale that, while apprising relative order, is not informative of absolute magnitude of or proportionality between the categories. A number of statistically sound models for OCRs are available in the statistical literature, such as logistic regression and probit models, but these are commonly underutilized in practice. Instead, the ordinary least squares linear …
Issues In Testing Dna Methylation Using Next-Generation Sequencing, Douglas Baumann, R. W. Doerge
Issues In Testing Dna Methylation Using Next-Generation Sequencing, Douglas Baumann, R. W. Doerge
Conference on Applied Statistics in Agriculture
DNA methylation is an epigenetic modification known to affect gene expression, cellular differentiation, as well as phenotypes. Recent advancements in next-generation sequencing technologies have provided unparalleled insight into the location and function of DNA methylation in a variety of organisms. These data require vastly different statistical procedures than data from previous genomic-based technologies. We outline the biological and chemical processes involved in several approaches for gaining DNA methylation data. The implications of the differences between the approaches are discussed relative to the statistical methodology, and the use of genome annotation is explored for the purpose of improving the statistical power …
Editor's Preface And Table Of Contents, Weixin Yao
Editor's Preface And Table Of Contents, Weixin Yao
Conference on Applied Statistics in Agriculture
These proceedings contain papers presented in the twenty-third annual Kansas State University Conference on Applied Statistics in Agriculture, held in Manhattan, Kansas, May 01 - May 03, 2011.
Effects Of Xfe Liquid Energy And Choice White Grease On Nursery Pig Performance, W Ying, Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz
Effects Of Xfe Liquid Energy And Choice White Grease On Nursery Pig Performance, W Ying, 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 evaluate the effects of XFE Liquid Energy (XFE Products, Des Moines, IA) and choice white grease (CWG) on growth performance of nursery pigs. In Exp. 1, a total of 150 nursery pigs (TR4 × 1050, initially 27.0 lb) were used in a 21-d experiment. Pens of pigs were balanced by initial BW and randomly allotted to 1 of 5 dietary treatments with 6 replications per treatment. The 5 dietary treatments included a control corn-soybean meal-based diet, the control diet with 2 or 4% CWG, or the control diet with 2 or 4% liquid energy. Overall …
Southwest Research-Extension Center, Field Day 2011
Southwest Research-Extension Center, Field Day 2011
Kansas Agricultural Experiment Station Research Reports
Report of agricultural research from Southwest Research-Extension Center of Kansas State University.
Effects Of Sodium Salicylate On Productivity Of Postpartum Dairy Cows, J.K. Farney, J. Ernest Minton, J.F. Coetzee, Larry C. Hollis
Effects Of Sodium Salicylate On Productivity Of Postpartum Dairy Cows, J.K. Farney, J. Ernest Minton, J.F. Coetzee, Larry C. Hollis
Kansas Agricultural Experiment Station Research Reports
Inflammation has been proposed as a contributor to metabolic disorders in transition dairy cows. The purpose of this experiment was to determine whether a non-steroidal anti-inflammatory drug, sodium salicylate (SS), benefits transition cows. At calving, 78 cows (primiparous, n = 39; second lactation, n = 28; ≥3 lactations, n = 11) were assigned alternately to either a control (CON) or SS treatment for 7 days and remained on study until 21 days postpartum. Treatment was administered via individual water bowls at a concentration of 2.5 g/L, delivering a mean of 183 ± 8.5 g/day SS during the 7 days of …
Effects Of Dietary L-Carnitine And Ddgs On Growth, Carcass Characteristics, And Loin And Fat Quality Of Growing-Finishing Pigs, W Ying, Michael D. Tokach, Steven S. Dritz, Terry A. Houser, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen
Effects Of Dietary L-Carnitine And Ddgs On Growth, Carcass Characteristics, And Loin And Fat Quality Of Growing-Finishing Pigs, W Ying, Michael D. Tokach, Steven S. Dritz, Terry A. Houser, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen
Kansas Agricultural Experiment Station Research Reports
A total of 1,104 barrows and gilts (PIC 337 × 1050, initially 80 lb) were used in a 109-d study to evaluate the effects of dietary L-Carnitine and dried distillers grains with solubles (DDGS) on growth, carcass traits, and loin and fat quality. Pigs were blocked by weight and randomly assigned to 1 of 6 treatments with 7 replications per treatment. Treatments were arranged as a 2 × 3 factorial with main effects of added DDGS (0 or 30% in Phases 1, 2, and 3 and 20% in Phase 4) and L-Carnitine (0, 50, or 100 ppm). Dietary treatments were …
Effects Of Increasing Ndf From Either Dried Distillers Grains With Solubles Or Wheat Middlings, Individually Or In Combination, On The Growth Performance, Carcass Characteristics, And Carcass Fat Quality In Growing-Finishing Pigs, M D. Asmus, Joel M. Derouchey, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz
Effects Of Increasing Ndf From Either Dried Distillers Grains With Solubles Or Wheat Middlings, Individually Or In Combination, On The Growth Performance, Carcass Characteristics, And Carcass Fat Quality In Growing-Finishing Pigs, M D. Asmus, Joel M. Derouchey, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz
Kansas Agricultural Experiment Station Research Reports
A total of 288 pigs (PIC TR4 × 1050, initially 83.6 lb) were used in an 87-d study to determine the effects of increasing dietary NDF from wheat middlings (midds) and dried distillers grains with solubles (DDGS) on growth performance, carcass characteristics, and carcass fat quality of growing-finishing pigs. Pens of pigs were randomly allot- ted by initial weight and gender (4 barrows and 4 gilts per pen) to 1 of 6 dietary treatments with 6 replications per treatment. Treatments were arranged in a 2 × 2 factorial plus 2 additional treatments with the main effects of added wheat middlings …
Effects Of Adding Cracked Corn To A Pelleted Supplement For Nursery And Finishing Pigs, C B. Paulk, Adam C. Fahrenholz, J M. Wilson, D D. Cook, Leland J. Mckinney, J C. Ebert, J J. Ohlde, Jerome C. Nietfeld, Joe D. Hancock, Keith C. Behnke
Effects Of Adding Cracked Corn To A Pelleted Supplement For Nursery And Finishing Pigs, C B. Paulk, Adam C. Fahrenholz, J M. Wilson, D D. Cook, Leland J. Mckinney, J C. Ebert, J J. Ohlde, Jerome C. Nietfeld, Joe D. Hancock, Keith C. Behnke
Kansas Agricultural Experiment Station Research Reports
Three experiments were conducted to determine the effects of supplementing cracked corn into diets of nursery and finishing pigs. In Exp. 1, 144 pigs were used in a 28-d trial. Pigs (PIC TR4 × 1050; initially 16.5 lb) were weaned and allotted with 6 pigs per pen (3 barrows and 3 gilts) and 6 pens per treatment. All pigs were fed a common diet for 7 d postweaning and the experimental diets for the next 28 d. Treatments were corn-soybean meal-based in the form of mash, pellets, and pellets with 100% of the corn either ground (618 μm) or cracked …
Effects Of Dietary Astaxanthin And Ractopamine Hcl On The Growth And Carcass Characteristics Of Finishing Pigs And The Color Shelf-Life Of Longissimus Chops From Barrows And Gilts, J R. Bergstrom, G R. Skaar, Terry A. Houser, Michael D. Tokach, Steven S. Dritz, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey
Effects Of Dietary Astaxanthin And Ractopamine Hcl On The Growth And Carcass Characteristics Of Finishing Pigs And The Color Shelf-Life Of Longissimus Chops From Barrows And Gilts, J R. Bergstrom, G R. Skaar, Terry A. Houser, Michael D. Tokach, Steven S. Dritz, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey
Kansas Agricultural Experiment Station Research Reports
A total of 160 pigs (initially 198 lb) were used to evaluate the effects of increasing dietary astaxanthin (AX, from Xanthophyllomyces dendrorhous yeast) and Ractopamine HCl (RAC) on the growth and carcass characteristics of finishing pigs as well as the color shelf-life of longissimus muscle (LM) chops from barrows and gilts. Pigs were weighed and randomly allotted to 1 of 8 dietary treatments fed for approximately 26 d preharvest. Dietary treatments consisted of a corn-soybean meal-based control diet, the control diet with 7.5, 15, 30, 60, or 120 ppm AX, and a corn-soybean meal-based diet with 10 ppm RAC and …
Director's Report Of Research In Kansas 2011, Kansas State University. Agricultural Experiment Station
Director's Report Of Research In Kansas 2011, 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.
2011 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service
2011 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service
Kansas Agricultural Experiment Station Research Reports
No abstract provided.
Kansas Fertilizer Research 2010, Dorivar Ruiz Diaz
Kansas Fertilizer Research 2010, Dorivar Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
No abstract provided.
Field Research 2011, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service
Field Research 2011, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service
Kansas Agricultural Experiment Station Research Reports
Includes research reports from these locations: East Central Kansas Experiment Field, Harvey Country Experiment Field, Kansas River Valley Experiment Field, and Northwest Kansas Agricultural Research Centers.
Roundup 2011
Kansas Agricultural Experiment Station Research Reports
Roundup is the major beef cattle education and outreach event sponsored by the Agricultural Research Center-Hays. The 2011 program is the 98th staging of Roundup. The purpose is to communicate timely, applicable research information to producers and extension personnel. The research program of the Agricultural Research Center-Hays is dedicated to serving the people of Kansas by developing new knowledge and technology to stabilize and sustain long-term production of food and fiber in a manner consistent with conservation of natural resources, protection of the environment, and assurance of food safety. Primary emphasis is on production efficiency through optimization of inputs in …
Optimizing A New 5-Day Cidr-Co-Synch Timed Artificial Insemination Program, Jeffrey S. Stevenson, Stephanie Leeann Pulley, H.I. Mellieon, K. C. Olson, Sandra K. Johnson, David M. Grieger, John R. Jaeger, Ryan M. Breiner
Optimizing A New 5-Day Cidr-Co-Synch Timed Artificial Insemination Program, Jeffrey S. Stevenson, Stephanie Leeann Pulley, H.I. Mellieon, K. C. Olson, Sandra K. Johnson, David M. Grieger, John R. Jaeger, Ryan M. Breiner
Kansas Agricultural Experiment Station Research Reports
The 7-day CO-Synch + CIDR protocol is a popular ovulation-synchronization program used by cow-calf producers to facilitate artificial insemination (AI). A progesterone- impregnated controlled internal drug release (CIDR) insert is placed intravaginally and an injection of gonadotropin-releasing hormone (GnRH) is given. After 7 days, prostaglandin F2α(PGF2α) is administered and the CIDR insert is removed. Between 58 and 72 hours after insert removal, cows are inseminated after another injection of GnRH to induce ovulation. Timed AI pregnancy rates generally have ranged from 40 to 60% when suckled cows are treated with the 7-day CO-Synch + CIDR protocol.
Nutrient Restriction Does Not Affect Implant Efficacy, T. Lee, Laman K. Mamedova, Benjamin W. Wileman, Daniel U. Thomson, Barry J. Bradford, Christopher D. Reinhardt
Nutrient Restriction Does Not Affect Implant Efficacy, T. Lee, Laman K. Mamedova, Benjamin W. Wileman, Daniel U. Thomson, Barry J. Bradford, Christopher D. Reinhardt
Kansas Agricultural Experiment Station Research Reports
Anabolic implants in finishing beef cattle offer significant return on investment. Anabolic implants improve average daily gain feed efficiency in pasture and feedlot cattle. One way growth-promoting implants stimulate growth is through increasing production of insulin-like growth factor 1. This hormone causes muscle cells to increase their uptake of glucose and amino acids from the bloodstream. Plasma urea nitrogen is a simple measure of the protein nutritional status of animals. If lean growth is stimulated, more feed protein is utilized and retained as body protein, reducing the amount of circulating plasma urea nitrogen. If an animal is stressed and is …
Grazing Wheat Did Not Reduce Beef Cow Pregnancy Rates, Sandra K. Johnson, Keith R. Harmoney
Grazing Wheat Did Not Reduce Beef Cow Pregnancy Rates, Sandra K. Johnson, Keith R. Harmoney
Kansas Agricultural Experiment Station Research Reports
Beef producers can lower feed costs by extending the grazing period and reducing the need for harvested forages. Complementary forage systems extend the native range grazing season; wheat pasture is common in the southern portion of the High Plains. Anecdotal reports have been made concerning lowered fertility in beef cows bred on lush forage such as wheat pasture; however, ruling out other possible causes of low fertility is difficult. In lactating dairy cows, fertility is lower during consumption of high-protein diets that result in high blood urea nitrogen content. Lower uterine pH that in turn affects embryo survival is thought …
Is Gnrh Necessary At Cidr Insertion Using A 7-Day Cidr Synchronization Protocol For Beef Heifers?, D.R. Eborn, E.E. Blair, David M. Grieger
Is Gnrh Necessary At Cidr Insertion Using A 7-Day Cidr Synchronization Protocol For Beef Heifers?, D.R. Eborn, E.E. Blair, David M. Grieger
Kansas Agricultural Experiment Station Research Reports
The EAZI-BREED CIDR is commonly used in estrous synchronization protocols for both beef heifers and cows. The label calls for insertion of a progesterone-impregnated controlled internal drug release (CIDR) for 7 consecutive days with an injection of prostaglandin F2αgiven a day before CIDR removal. Animals should display estrus 1 to 3 days after CIDR removal. Modifications to this protocol include administration of gonadotropin-releasing hormone (GnRH) at the time of CIDR insertion and administration of the prostaglandin injection at the time of CIDR removal on day 7. Use of GnRH in conjunction with a CIDR may improve estrous synchronization in beef …