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- Feedlot cattle; Heat stress; Respiration rate; Panting score; Color (1)
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- Genetic correlation; Heritability; Litter size; Prolificacy; Weaning weight (1)
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Articles 1 - 30 of 32
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Comparison Of Heat Tolerance Of Feedlot Heifers Of Different Breeds, Tami M. Brown-Brandl, John A. Nienaber, Roger A. Eigenberg, Terry L. Mader, J.L. Morrow, J.W. Dailey
Comparison Of Heat Tolerance Of Feedlot Heifers Of Different Breeds, Tami M. Brown-Brandl, John A. Nienaber, Roger A. Eigenberg, Terry L. Mader, J.L. Morrow, J.W. Dailey
Department of Animal Science: Faculty Publications
Heat stress in cattle causes decreases in feed intake and feed efficiency; in extreme cases, it can cause death. These losses amount to millions of dollars each year. A study was designed to determine severity of heat stress among four breeds of cattle. Throughout two summers, 256 feedlot heifers of four different breeds were observed. Respiration rates, panting scores, and surface temperatures were taken twice each day on 10 animals/breed for several weeks during the summers of 2002 and 2003. Twenty-four-hour behavior measurements were recorded for four heat-stress and four thermoneutral days. Results showed during the afternoon, Angus cattle (black) …
Microarray Profiling Of Skeletal Muscle Sarcoplasmic Reticulum Proteins, Jospeh S. Schulz, Nathan Palmer, Jon Steckelberg, Steven J. Jones, Michael G. Zeece
Microarray Profiling Of Skeletal Muscle Sarcoplasmic Reticulum Proteins, Jospeh S. Schulz, Nathan Palmer, Jon Steckelberg, Steven J. Jones, Michael G. Zeece
Department of Animal Science: Faculty Publications
Microarrays were developed to profile the level of proteins associated with calcium regulation in sarcoplasmic reticulum (SR) isolated from porcine Longissimus muscle. The microarrays consisted of SR preparations printed onto to glass slides and probed with monoclonal antibodies to 7 target proteins. Proteins investigated included: ryanodine receptor, (RyR), dihydropyridine receptor, (DHPR), triadin (TRI), calsequestrin (CSQ), 90 kDa junctional protein (JSR90), and fast-twitch and slow-twitch SR calcium ATPases (SERCA1 and SERCA2). Signal from a fluorescentlylabeled detection antibody was measured and quantitated using a slide reader. The microarray developed was also employed to profile Longissimus muscle SR proteins from halothane genotyped animals. …
National Pork Producers Council Maternal Line National Genetic Evaluation Program: A Comparison Of Sow Longevity And Trait Associations With Sow Longevity, T. Serenius, K. J. Stalder, T. J. Baas, J. W. Mabry, R. N. Goodwin, R. K. Johnson, O. W. Robison, M. Tokach, R. K. Miller
National Pork Producers Council Maternal Line National Genetic Evaluation Program: A Comparison Of Sow Longevity And Trait Associations With Sow Longevity, T. Serenius, K. J. Stalder, T. J. Baas, J. W. Mabry, R. N. Goodwin, R. K. Johnson, O. W. Robison, M. Tokach, R. K. Miller
Department of Animal Science: Faculty Publications
Data from the National Pork Producers Council Maternal Line National Genetic Evaluation Program were used to compare longevity of sows from 6 commercial genetic lines and to estimate the phenotypic associations of sow longevity with gilt backfat thickness, ADG, age at first farrowing, litter size at first farrowing, litter weight at first farrowing, average feed intake during lactation, and average backfat loss during lactation. The lines evaluated were American Diamond Genetics, Danbred North America, Dekalb-Monsanto DK44, Dekalb-Monsanto GPK347, Newsham Hybrids, and National Swine Registry. The data set contained information from 3,251 gilts, of which 17% had censored longevity records (sows …
Bovine Respiratory Disease In Feedlot Cattle: Environmental, Genetic, And Economic Factors, G. D. Snowder, L. Dale Van Vleck, L. V. Cundiff, G. L. Bennett
Bovine Respiratory Disease In Feedlot Cattle: Environmental, Genetic, And Economic Factors, G. D. Snowder, L. Dale Van Vleck, L. V. Cundiff, G. L. Bennett
Department of Animal Science: Faculty Publications
The objective of this study was to characterize genetic, environmental, and economic factors related to the incidence of bovine respiratory disease (BRD) in feedlot calves. Records from 18,112 calves representing 9 breeds (Angus, Braunvieh, Charolais, Gelbvieh, Hereford, Limousin, Pinzgauer, Red Poll, and Simmental) and 3 composite types (MARC I, MARC II, and MARC III) over a 15-yr period (1987 to 2001) were evaluated. Disease incidence was observed and recorded by station veterinary and technical staff. The incidence of BRD varied across years, with the annual observed incidence ranging from 5 to 44%. From 1987 to 1992, the annual average incidence …
Vascular Endothelial Growth Factor And Kinase Domain Region Receptor Are Involved In Both Seminiferous Cord Formation And Vascular Development During Testis Morphogenesis In The Rat, Rebecca C. Bott, Ryann M. Mcfee, Debra T. Clopton, Candice Toombs, Andrea S. Cupp
Vascular Endothelial Growth Factor And Kinase Domain Region Receptor Are Involved In Both Seminiferous Cord Formation And Vascular Development During Testis Morphogenesis In The Rat, Rebecca C. Bott, Ryann M. Mcfee, Debra T. Clopton, Candice Toombs, Andrea S. Cupp
Department of Animal Science: Faculty Publications
Morphological male sex determination is dependent on migration of endothelial and preperitubular cells from the adjacent mesonephros into the developing testis. Our hypothesis is that VEGFA and its receptor KDR are necessary for both testicular cord formation and neovascularization. The Vegfa gene has 8 exons with many splice variants. Vegfa120, Vegfa164, and Vegfa188 mRNA isoforms were detected on Embryonic Day (E) 13.5 (plug date = E0) in the rat. Vegfa120, Vegfa144, Vegfa164, Vegfa188, and Vegfa205 mRNA were detected at E18 and Postnatal Day 3 (P3). Kdr mRNA was present on E13.5, whereas …
Perspective Greenhouse Gas Mitigation By Covers On Livestock Slurry Tanks And Lagoons?, Soren O. Petersen, Daniel N. Miller
Perspective Greenhouse Gas Mitigation By Covers On Livestock Slurry Tanks And Lagoons?, Soren O. Petersen, Daniel N. Miller
Department of Animal Science: Faculty Publications
Liquid manure (slurry) storage facilities are important point sources of atmospheric pollution. Being point sources, containment of gaseous emissions via improved storage conditions may be possible, and permeable surface covers (natural crusts and artificial covers) are increasingly recognized for their capacity to reduce various gaseous emissions. Microbial transformations in permeable surface covers include bacterial-methane oxidation, but this interface between nitrogen-rich slurry and the atmosphere is also an environment with intense nitrogen turnover that can lead to nitrous oxide emissions. Both methane and nitrous oxide are greenhouse gases, and strategies to reduce environmental impact of slurry stores must consider the total …
Estimates Of Genetic Parameters And Genetic Trend For Reproduction, Weight, And Wool Characteristics Of Polypay Sheep, Kathryn J. Hanford, L. Dale Van Vleck, G.D. Snowder
Estimates Of Genetic Parameters And Genetic Trend For Reproduction, Weight, And Wool Characteristics Of Polypay Sheep, Kathryn J. Hanford, L. Dale Van Vleck, G.D. Snowder
Department of Animal Science: Faculty Publications
The objective was to describe genetic parameters and genetic changes in litter sizes at birth and weaning (LB and LW, n =9081), birth weight (BW, n =11,896), weaning weight (WW, n =11,104), fleece weight and grade (FW and FG, n =8872), and staple length (SL, n =1805) of Polypay sheep. Direct heritability estimates from single-trait analyses were 0.11 for LB, 0.02 for LW, 0.17 for BW, 0.18 for WW, 0.68 for FW, 0.36 for FG, and 0.76 for SL. Estimates of direct genetic correlation were 0.40 between LB and LW, 0.57 between BW and WW, 0.65 between FW and SL, …
Evaluation Of Average Daily Gain Prediction By Level One Of The 1996 National Research Council Beef Model And Development Of Net Energy Adjusters, H. C. Block, Terry Klopfenstein, Galen E. Erickson
Evaluation Of Average Daily Gain Prediction By Level One Of The 1996 National Research Council Beef Model And Development Of Net Energy Adjusters, H. C. Block, Terry Klopfenstein, Galen E. Erickson
Department of Animal Science: Faculty Publications
Two data sets were developed to evaluate and refine feed energy predictions with the beef National Research Council (NRC, 1996) model level 1. The first data set included pen means of group-fed cattle from 31 growing trials (201 observations) and 17 finishing trials (154 observations) representing over 7,700 animals fed outside in dirt lots. The second data set consisted of 15 studies with individually fed cattle (916 observations) fed in a barn. In each data set, actual ADG was compared with ADG predicted with the NRC model level 1, assuming thermoneutral environmental conditions. Next, the observed ADG (kg), TDN intake …
Effects Of Age, Weight, And Fat Slaughter End Points On Estimates Of Breed And Retained Heterosis Effects For Carcass Traits, A. Ríos-Utrera, L. V. Cundiff, K. E. Gregory, R. M. Koch, M. E. Dikeman, M. Koohmaraie, L. Dale Van Vleck
Effects Of Age, Weight, And Fat Slaughter End Points On Estimates Of Breed And Retained Heterosis Effects For Carcass Traits, A. Ríos-Utrera, L. V. Cundiff, K. E. Gregory, R. M. Koch, M. E. Dikeman, M. Koohmaraie, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
The influence of different levels of adjusted fat thickness (AFT) and HCW slaughter end points (covariates) on estimates of breed and retained heterosis effects was studied for 14 carcass traits from serially slaughtered purebred and composite steers from the US Meat Animal Research Center (MARC). Contrasts among breed solutions were estimated at 0.7, 1.1, and 1.5 cm of AFT, and at 295.1, 340.5, and 385.9 kg of HCW. For constant slaughter age, contrasts were adjusted to the overall mean (432.5 d). Breed effects for Red Poll, Hereford, Limousin, Braunvieh, Pinzgauer, Gelbvieh, Simmental, Charolais, MARC I, MARC II, and MARC III …
Comparison Of Feed Energy Costs Of Maintenance, Lean Deposition, And Fat Deposition In Three Lines Of Mice Selected For Heat Loss, D. L. Eggert, Merlyn K. Nielsen
Comparison Of Feed Energy Costs Of Maintenance, Lean Deposition, And Fat Deposition In Three Lines Of Mice Selected For Heat Loss, D. L. Eggert, Merlyn K. Nielsen
Department of Animal Science: Faculty Publications
Three replications of mouse selection populations for high heat loss (MH), low heat loss (ML), and a nonselected control (MC) were used to estimate the feed energy costs of maintenance and gain and to test whether selection had changed these costs. At 21 and 49 d of age, mice were weighed and subjected to dual x-ray densitometry measurement for prediction of body composition. At 21 d, mice were randomly assigned to an ad libitum, an 80% of ad libitum, or a 60% of ad libitum feeding group for 28-d collection of individual feed intake. Data were analyzed using 3 approaches. …
Correlated Responses In Maternal Performance Following Divergent Selection For Heat Loss In Mice, J. M. Mcdonald, Merlyn . K. Nielsen
Correlated Responses In Maternal Performance Following Divergent Selection For Heat Loss In Mice, J. M. Mcdonald, Merlyn . K. Nielsen
Department of Animal Science: Faculty Publications
Divergent selection in mice was applied in 3 independent replicates for high (maintenance high; MH) and low (maintenance low; ML) heat loss for 16 generations. An unselected control (maintenance control; MC) was also maintained in all replicates. Selection ceased for 26 generations; heat-loss measurement and selection resumed at generation 42. Lactation performance, dam weight, dam feed intake, and efficiency of production of pup weight were recorded or calculated for MH and ML dams in all 3 replicates at generation 46 or 47 with the objective of determining whether selection for heat loss has created correlated responses in maternal performance. One-half …
Determination Of Undegradable Intake Protein Digestibility Of Forages Using The Mobile Nylon Bag Technique, H. L. Haugen, S. K. Ivan, James C. Macdonald, Terry J. Klopfenstein
Determination Of Undegradable Intake Protein Digestibility Of Forages Using The Mobile Nylon Bag Technique, H. L. Haugen, S. K. Ivan, James C. Macdonald, Terry J. Klopfenstein
Department of Animal Science: Faculty Publications
Two experiments were conducted using 2 ruminally and duodenally fistulated steers to determine the digestibility of undegradable intake protein (UIP) of smooth bromegrass (Bromis inermis), birdsfoot trefoil (Lotus coniculatus L.), and heat-treated alfalfa (Medicago sativa) using the mobile nylon bag technique. Undegradable intake protein was determined using neutral detergent insoluble CP at a single in situ incubation time point based on 75% of the total mean retention time estimated from IVDMD plus a 10-h passage lag. In Exp. 1, UIP (% DM) of smooth bromegrass in June and July were 1.82 and 1.71, respectively (P …
Benchmarking Carcass Characteristics And Muscles From Commercially Identified Beef And Dairy Cull Cow Carcasses For Warner-Bratzler Shear Force And Sensory Attributes, A. M. Stelzleni, L. E. Patten, D. D. Johnson, Chris R. Calkins, B. L. Gwartney
Benchmarking Carcass Characteristics And Muscles From Commercially Identified Beef And Dairy Cull Cow Carcasses For Warner-Bratzler Shear Force And Sensory Attributes, A. M. Stelzleni, L. E. Patten, D. D. Johnson, Chris R. Calkins, B. L. Gwartney
Department of Animal Science: Faculty Publications
The objective of this study was to benchmark carcasses and muscles from commercially identified fed (animals that were perceived to have been fed an increased plane of nutrition before slaughter) and nonfed cull beef and dairy cows and A-maturity, USDA Select steers, so that the muscles could be identified from cull cow carcasses that may be used to fill a void of intermediately priced beef steaks. Carcass characteristics were measured at 24 h postmortem for 75 carcasses from 5 populations consisting of cull beef cows commercially identified as fed (B-F, n = 15); cull beef cows commercially identified as nonfed …
Flavor Relationships Among Muscles Form The Beef Chuck And Round, J. L. Meisinger, J. M. James, Chris R. Calkins
Flavor Relationships Among Muscles Form The Beef Chuck And Round, J. L. Meisinger, J. M. James, Chris R. Calkins
Department of Animal Science: Faculty Publications
This research compared off-flavor notes and the relationship of pH and heme-iron content to off-flavor for different beef muscles. After grading, knuckles and shoulder clods were removed from 16 USDA Choice and 14 USDA Select beef carcasses, vacuum- packaged, and aged for 7 d. The rectus femoris (REC), vastus medalis (VAM), vastus lateralis (VAL), teres major (TER), infraspinatus (INF), and triceps brachii-long head (TRI) were separated, cut into steaks, and frozen (−16°C). Sensory analysis was conducted using a trained taste panel, with steaks grilled to an internal temperature of 65°C. Heme-iron concentration and pH were determined. The INF had lower …
Environmental Factors Influencing Heat Stress In Feedlot Cattle, Terry L. Mader, M. S. Davis, Tami Brown-Brandl
Environmental Factors Influencing Heat Stress In Feedlot Cattle, Terry L. Mader, M. S. Davis, Tami Brown-Brandl
Department of Animal Science: Faculty Publications
Data from 3 summer feedlot studies were utilized to determine the environmental factors that influence heat stress in cattle and also to determine wind speed (WSPD; m∙s-1) and solar radiation (RAD; W∙m-2) adjustments to the temperature-humidity index (THI). Visual assessments of heat stress, based on panting scores (0 = no panting to 4 = severe panting), were collected from 1400 to 1700. Mean daily WSPD, black globe temperature at 1500, and minimums for nighttime WSPD, nighttime black globe THI, and daily relative humidity were found to have the greatest influence on panting score from 1400 to …
Environmental Effects On Pregnancy Rate In Beef Cattle, J. L. Amundson, Terry L. Mader, Richard J. Rasby, Q. S. Hu
Environmental Effects On Pregnancy Rate In Beef Cattle, J. L. Amundson, Terry L. Mader, Richard J. Rasby, Q. S. Hu
Department of Animal Science: Faculty Publications
Ten years of calving records were examined from Bos taurus crossbred cows (mean of 182 cows/ yr) to quantify the effects of environmental conditions during the breeding season on pregnancy rate. Estimated breeding dates were determined by subtracting 283 d from the calving date. Relationships were determined between the proportion of cows bred during the periods from the beginning of the breeding season until d 21, 42, and 60 of the breeding season and the corresponding environmental variables. Weather data were compiled from a weather station located approximately 20 km from the research site. Average daily temperature and relative humidity …
Effects Of Growth-Promoting Agents And Season On Blood Metabolites And Body Temperature In Heifers, Terry L. Mader, W. M. Kreikemeier
Effects Of Growth-Promoting Agents And Season On Blood Metabolites And Body Temperature In Heifers, Terry L. Mader, W. M. Kreikemeier
Department of Animal Science: Faculty Publications
To assess the efficacy of growth-promoting agents among seasons, triiodothyronine (T3), thyroxine (T4), plasma urea nitrogen (PUN), IGF-I, and tympanic temperature (TT) were measured in summer and winter studies. Heifers (n = 9/pen) were allotted to 12 pens in both December and June. Pens were assigned to 1 of 6 growth promotant treatments: control (no growth promotant), estrogenic implant (E), trenbolone acetate implant (TBA), E + TBA (ET), melengestrol acetate (MGA), and ET + MGA (ETM). Blood samples were collected from 4 heifers per pen per study on d 0, 28, 56, and 84 via jugular …
Sorting Strategies For Long Yearling Cattle Grown In An Extensive Forage Utilization Beef Production System, James C. Macdonald, T. J. Klopfenstein, G. E. Erickson, C. N. Macken, J. D. Folmer, M. P. Blackford
Sorting Strategies For Long Yearling Cattle Grown In An Extensive Forage Utilization Beef Production System, James C. Macdonald, T. J. Klopfenstein, G. E. Erickson, C. N. Macken, J. D. Folmer, M. P. Blackford
Department of Animal Science: Faculty Publications
One hundred sixty English-cross steers (244 kg, SD=23 kg) were used in each yr of a 2-yr study to determine effects of sorting on performance, carcass characteristics, variability, and profitability in a long yearling system utilizing ranch-source calves. Steers were back grounded during winter then grazed smooth brome-grass pastures followed by warm season native range prior to entering the feedlot in the fall. Steers were stratified by BW and allotted to 1 of 4 treatments: 1) 40 head sorted by pre-grazing BW where heavy steers entered the feedlot in July (PST), 2) 40 head sorted by BW entering the feedlot …
Application Of The 1996 Nrc To Protein And Energy Nutrition Of Range Cattle, H. H. Patterson, D. C. Adams, T. J. Klopfenstein, G. P. Lardy
Application Of The 1996 Nrc To Protein And Energy Nutrition Of Range Cattle, H. H. Patterson, D. C. Adams, T. J. Klopfenstein, G. P. Lardy
Department of Animal Science: Faculty Publications
Based on applications of the 1996 National Research Council (NRC) Nutrient Requirement of Beef Cattle (2000 update) model at our laboratories and on use of the model to evaluate published literature, it is our assessment that the NRC model (Level 1) represents an advancement in nutrient requirements of grazing cattle. We evaluated 8 published studies (35 treatment observations) to compare observed changes in body condition score (BCS) to those predicted by the NRC model, and to develop criteria to help with application of the model to range cattle nutrition. When in vitro organic matter disappearance (IVOMD) of grazed diets was …
Effects Of Pre- And Postpartum Nutrition On Reproduction In Spring Calving Cows And Calf Feedlot Performance, Leslie Aaron Stalker, Don C. Adams, Terry J. Klopfenstein, D. M. Feuz, Richard N. Funston
Effects Of Pre- And Postpartum Nutrition On Reproduction In Spring Calving Cows And Calf Feedlot Performance, Leslie Aaron Stalker, Don C. Adams, Terry J. Klopfenstein, D. M. Feuz, Richard N. Funston
Department of Animal Science: Faculty Publications
Crossbred, spring-calving cows (yr 1, n = 136; yr 2, n = 113; yr 3, n = 113) were used in a 3- yr experiment to evaluate the influence of supplemental protein prepartum and grazing subirrigated meadow postpartum on pregnancy rates and calf feedlot performance. A 2 × 2 factorial arrangement of treatments was used in a switchback design. From December 1 to February 28, cows grazed dormant upland range in 8 pastures (32 ± 2 ha each). The equivalent of 0.45 kg of supplement/cow per d (42% CP) was provided to half of the cows on a pasture basis …
Consumer Sensory Acceptance And Value Of Wet-Aged And Dry-Aged Beef Steaks, B. M. Sitz, Chris R. Calkins, D. M. Feuz, W. J. Umberger, Kent M. Eskridge
Consumer Sensory Acceptance And Value Of Wet-Aged And Dry-Aged Beef Steaks, B. M. Sitz, Chris R. Calkins, D. M. Feuz, W. J. Umberger, Kent M. Eskridge
Department of Animal Science: Faculty Publications
To determine sensory preference and value of fresh beef steak differing in aging technique, strip steaks were evaluated by consumers in Denver (n = 132 consumers) and Chicago (n = 141 consumers). Wet-aged Choice strip loins were matched with dry-aged Choice strip loins, whereas wet-aged Prime strip loins were matched with dry-aged Prime strip loins. Dry-aged strip loins were commercially aged in air in a controlled environment for 30 d and vacuum-aged for 7 d during shipping and storage. Wet-aged strip loins were vacuum-packaged and aged for 37 d in a 1°C cooler. Pairs of strip loins were matched to …
Heat Stress Risk Factors Of Feedlot Heifers, Tami M. Brown-Brandl, Roger A. Eigenberg, John Nienaber
Heat Stress Risk Factors Of Feedlot Heifers, Tami M. Brown-Brandl, Roger A. Eigenberg, John Nienaber
Department of Animal Science: Faculty Publications
Heat stress in cattle results in millions of dollars in lost revenue each year due to production losses, and in extreme cases, death. Death losses are more likely to result from animals vulnerable to heat stress. A study was conducted to determine risk factors for heat stress in feedlot heifers. Over two consecutive summers, a total of 256 feedlot heifers (32/ breed/ year) of four breeds were observed. As a measure of stress, respiration rates and panting scores were taken twice daily (morning and afternoon) on a random sample of 10 heifers/ breed. Weights, condition scores, and temperament scores were …
Effects Of Age, Weight, And Fat Slaughter End Points On Estimates Of Breed And Retained Heterosis Effects For Carcass Traits, A. Ríos-Utrera, L. V. Cundiff, K. E. Gregory, R. M. Koch, M. E. Dikeman, M. Koohmaraie, L. Dale Van Vleck
Effects Of Age, Weight, And Fat Slaughter End Points On Estimates Of Breed And Retained Heterosis Effects For Carcass Traits, A. Ríos-Utrera, L. V. Cundiff, K. E. Gregory, R. M. Koch, M. E. Dikeman, M. Koohmaraie, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
The influence of different levels of adjusted fat thickness (AFT) and HCW slaughter end points (covariates) on estimates of breed and retained heterosis effects was studied for 14 carcass traits from serially slaughtered purebred and composite steers from the US Meat Animal Research Center (MARC). Contrasts among breed solutions were estimated at 0.7, 1.1, and 1.5 cm of AFT, and at 295.1, 340.5, and 385.9 kg of HCW. For constant slaughter age, contrasts were adjusted to the overall mean (432.5 d). Breed effects for Red Poll, Hereford, Limousin, Braunvieh, Pinzgauer, Gelbvieh, Simmental, Charolais, MARC I, MARC II, and MARC III …
Influence Of Corn Hybrid Traits On Digestibility And The Efficiency Of Gain In Feedlot Cattle, S. L. Jaeger, Matt K. Luebbe, C. N. Macken, Galen E. Erickson, Terry J. Klopfenstein, W. A. Fithian, David S. Jackson
Influence Of Corn Hybrid Traits On Digestibility And The Efficiency Of Gain In Feedlot Cattle, S. L. Jaeger, Matt K. Luebbe, C. N. Macken, Galen E. Erickson, Terry J. Klopfenstein, W. A. Fithian, David S. Jackson
Department of Animal Science: Faculty Publications
Two experiments were conducted to determine the influence of chemical and physical corn kernel traits on digestibility and feedlot cattle performance. Seven commercially available corn hybrids representing a range in kernel traits were evaluated for a variety of chemical and physical traits that included test weight, 1,000-grain weight, kernel size, starch, CP, amylose, Stenvert Hardness tests (kernel hardness traits), tangential abrasive dehulling device loss, 12-h in vitro starch disappearance, and rate and extent of in situ DM disappearance. Differences among hybrids existed for all physical kernel traits measured. In Exp. 1, 224 steers in 28 pens were fed the same …
Estimation Of Undegradable Intake Protein In Forages Using Neutral Detergent Insoluble Nitrogen At A Single In Situ Incubation Time Point, H. L. Haugen, M. J. Lamothe, Terry J. Klopfenstein, Don C. Adams, M. D. Ullerich
Estimation Of Undegradable Intake Protein In Forages Using Neutral Detergent Insoluble Nitrogen At A Single In Situ Incubation Time Point, H. L. Haugen, M. J. Lamothe, Terry J. Klopfenstein, Don C. Adams, M. D. Ullerich
Department of Animal Science: Faculty Publications
Two experiments were conducted to evaluate the use of neutral detergent insoluble nitrogen (NDIN) at a single in situ incubation time point to estimate the undegradable intake protein (UIP) in forages as well as to compare rates of NDIN degradation. Forage samples in Exp. 1 comprised diet samples collected from range and meadow pastures monthly from May through September. In Exp. 2, clipped samples of alfalfa, birdsfoot trefoil, kura clover, and smooth bromegrass, and diet samples of the mixed legume-grass and smooth bromegrass were evaluated. Forage samples were incubated in situ for their mean retention time (MRT) estimated from IVDMD …
The Effect Of Carbohydrate Source On Nitrogen Capture In Dairy Cows On Pasture, A. M. Gehman, J. A. Bertrand, T. C. Jenkins, B. W. Pinkerton
The Effect Of Carbohydrate Source On Nitrogen Capture In Dairy Cows On Pasture, A. M. Gehman, J. A. Bertrand, T. C. Jenkins, B. W. Pinkerton
Department of Animal Science: Faculty Publications
The objective of this study was to determine if feeding carbohydrate supplements with faster degradation rates than corn to dairy cows grazing ryegrass would improve nitrogen capture, milk production, and components. Treatments were grain supplements based on: 1) corn (CORN), 2) barley and molasses (BM), or 3) citrus pulp and molasses (CM). For BM and CM, the diet composition was the same as that of CORN except that a portion of the corn was replaced with barley and molasses or citrus pulp and molasses, respectively, on a dry matter basis. Cows grazed ryegrass (Lolium multiflorum Lam.) pasture. Yield of …
Technical Note: Estimating Statistical Power Of Mixed Models Used In Dairy Nutrition Experiments, Paul J. Kononoff, Kathryn J. Hanford
Technical Note: Estimating Statistical Power Of Mixed Models Used In Dairy Nutrition Experiments, Paul J. Kononoff, Kathryn J. Hanford
Department of Animal Science: Faculty Publications
Statistical power is defined as the probability of correctly rejecting the null hypothesis. Power calculations may be useful in planning experiments. The objective of this technical note is to outline an applied method that estimates statistical power of a dairy nutrition experiment that employs a Latin square as the experimental design. Because the SAS MIXED procedure (PROC MIXED) is commonly used to analyze data sets, this note outlines basic programming procedures that may be used to estimate statistical power of a mixed model using this procedure.
Milk Production Of Dairy Cows Fed Wet Corn Gluten Feed During The Dry Period And Lactation, Paul J. Kononoff, S. K. Ivan, W, Matzke, R. J. Grant, R. A. Stock, Terry J. Klopfenstein
Milk Production Of Dairy Cows Fed Wet Corn Gluten Feed During The Dry Period And Lactation, Paul J. Kononoff, S. K. Ivan, W, Matzke, R. J. Grant, R. A. Stock, Terry J. Klopfenstein
Department of Animal Science: Faculty Publications
An experiment was conducted with 36 primiparous and 40 multiparous Holstein cows to examine the effects of feeding wet corn gluten feed (WCGF) on 305- d milk production, dry matter (DM) intake, body condition score (BCS), and health. The experimental treatments included: 1) control—WCGF not fed (n = 27); 2) WCGF-L—cows received diets containing WCGF (38% DM basis) during lactation (n = 23); and 3) WCGFDL— cows received diets containing WCGF (38% DM basis) during the dry period and lactation (n = 26). During the dry period, cows consuming WCGF were observed to have a significant gain in BCS (0.07 …
The Cost Of Corn Processing For Finishing Cattle, C. N. Macken, G. E. Erickson, T. J. Klopfenstein
The Cost Of Corn Processing For Finishing Cattle, C. N. Macken, G. E. Erickson, T. J. Klopfenstein
Department of Animal Science: Faculty Publications
Three corn processing methods were compared for use in 5,000- and 20,000-head capacity feedlots. Processing methods were dry-rolled (DRC), early harvest and ensiling high-moisture (HMC), and steam-flaked corn (SFC). Processing costs were determined to be $1.58, $4.71, and $9.57/t (metric ton; DM basis) for DRC, HMC, and SFC, respectively, for the 5,000-capacity feedlot. Processing costs were less for the 20,000-capacity feedlot at $0.81, $3.07, and $6.23/t (DM basis) for DRC, HMC, and SFC, respectively. Using these economic calculations in an 85% corn diet (DM basis), an improvement of dietary feed efficiency would need to be 2.4 and 6.1% for feeding …
Effects Of Corn Processing Method And Protein Concentration In Finishing Diets Containing Wet Corn Gluten Feed On Cattle Performance, C. N. Macken, G. E. Erickson, T. J. Klopfenstein, R. A. Stock
Effects Of Corn Processing Method And Protein Concentration In Finishing Diets Containing Wet Corn Gluten Feed On Cattle Performance, C. N. Macken, G. E. Erickson, T. J. Klopfenstein, R. A. Stock
Department of Animal Science: Faculty Publications
Three hundred twenty crossbred steer calves (308 kg) were used to determine the effects of corn processing and addition of urea on performance with diets containing wet corn gluten feed (WCGF). The treatment design was a 5 × 2 factorial with factors of corn processing (dryrolled, DRC; fine-ground, FGC; rolled high-moisture, RHMC; ground high-moisture, GHMC; or steam-flaked corn, SFC) and CP concentration (14 or 15%) with 4 pens per treatment and 8 steers per pen. The final diet contained 60% corn, 25% WCGF, 10% corn silage, and 5% supplement (DM basis). No significant protein × grain processing interactions occurred for …