Digital Commons Network^™

Successfully Changing The Landscape Of Information Distribution: Extension Food Website Reaches People Locally And Globally, Alice Henneman, Lisa Franzen-Castle, Kayla Colgrove, Vishal Singh

Department of Nutrition and Health Sciences: Faculty Publications

The goal of the Food website was to develop Internet-based content that was relevant and reached the general public and multiplier groups, such as educators, health professionals, and media outlets. The purpose of this paper was to examine whether a multi-modal approach to information delivery through increases in and changes to content, electronic mailing list creation, and social media posting impacted user access, traffic channels, and referrals from 2010 to 2014. When comparing 2010-2011 versus 2013-2014, there was a 150% increase in total pageviews, 197% increase in unique pageviews, and a 39% increase in average time spent on a page. …

Signal Traits And Oxidative Stress: A Comparative Study Across Populations With Divergent Signals, Maren N. Vitousek, Oldřich Tomášek, Tomáš Albrecht, Matt Wilkins, Rebecca Safran

School of Biological Sciences: Faculty Publications

Diverging populations often shift patterns of signal use – a process that can contribute to reproductive isolation and speciation. Yet it is not clear why most traits gain or lose signal value during divergence. One reason this could occur is because changes in the relationship between signals and relevant physiological parameters degrade the reliability of a signal, or even change its underlying information content. Here we test the hypothesis that the relationship between signal trait elaboration and a central component of organismal health – oxidative stress – differs across closely related populations that have diverged in signal use and preferences. …

Examining The Reliability, Validity And Factor Structure Of The Drs-15 With College Athletes, Leilani Madrigal, Diane L. Gill, Kent M. Eskridge

Athletic Performance Research

Hardiness, comprising feelings of commitment, control and challenge, is most frequently measured with the Dispositional Resiliency Scale (DRS), but little work has been done with the brief 15-item version. To examine the factor structure, reliability, validity, and item functioning for gender invariance of the 15-item DRS with 525 collegiate athletes from a wide range of sports. Convergent and divergent validity were examined through relationships with mental toughness, grit and competitive anxiety. Participants completed measures of mental toughness, optimism, grit, competitive anxiety, and the DRS-15. Confirmatory Factor Analysis revealed a poor fit for the three-factor hardiness model, and subsequent exploratory factor …

Engineering A Trifunctional Proline Utilization A Chimaera By Fusing A Dna-Binding Domain To A Bifunctional Puta, Benjamin W. Arentson, Erin L. Hayes, Weidong Zhu, John J. Tanner, Donald F. Becker

Department of Biochemistry: Faculty Publications

Proline utilization A (PutA) is a bifunctional flavoenzyme with proline dehydrogenase (PRODH) and Δ¹-pyrroline-5- carboxylate (P5C) dehydrogenase (P5CDH) domains that catalyses the two-step oxidation of proline to glutamate. Trifunctional PutAs also have an N-terminal ribbon–helix–helix (RHH) DNA-binding domain and moonlight as autogenous transcriptional repressors of the put regulon. A unique property of trifunctional PutA is the ability to switch functions from DNA-bound repressor to membrane-associated enzyme in response to cellular nutritional needs and proline availability. In the present study, we attempt to construct a trifunctional PutA by fusing the RHH domain of Escherichia coli PutA (EcRHH) to the …

Point-Of-Purchase Efforts To Increase Healthy Food Choice, Christopher Gustafson

Cornhusker Economics

The prevalence of overweight and obesity in the U.S. population has increased steadily over the past four decades, impacting health, livelihoods, and quality of life. Recent estimates of U.S. adult and childhood overweight and obesity rates suggest that nearly 35 percent of adults are obese and another 34 percent are overweight, while 17 percent of children are obese and 15 percent overweight. Obesity is associated with a number of negative consequences that impact both the individual and society. These consequences include poorer health, an increased risk of associated non-communicable diseases, such as type-2 diabetes, certain types of cancer, and heart …

Producer Concerns And Perceptions Regarding The Effect Of Methane On Cattle Production And The Environment, Bradley M. Boyd, Amanda Burken, Lisa Franzen- Castle Castle, Karla Jenkins, Richard J. Rasby, Matt K. Luebbe, Rick Stowell, Samodha C. Fernando, Galen E. Erickson

Nebraska Beef Cattle Reports

Knowledge of producer concerns and perceptions on methane production from cattle and its impact on the environment is unknown. Therefore, the objectives of this survey were to determine what producers know about methane production by cattle and to determine if different age groups, regions of Nebraska, and production size/ type affects producer opinions on enteric methane production and climate change. Producers felt that methane production has little impact on animal performance but were not very confident in their knowledge. Most producers received information related to animal agriculture from veterinarians; therefore, veterinarians should continue to be a major target for extension …

Impact Of Feeding Distillers Grains Or Isolated Components In Distillers Grains On Feedlot Performance And Carcass Traits, Brianna B. Conroy, Matt K. Luebbe, Galen E. Erickson Erickson, Jim C. Macdonald, Jacob A. Hansen

Nebraska Beef Cattle Reports

Six treatments were evaluated to determine the contribution of individual components of distillers grains on finishing performance. Diets were formulated to isolate the contribution of solubles, protein, fat, and fiber compared to a diet containing 40% wet distillers grains or a corn- based control. Th ere was a significant improvement in both feedlot and carcass performance in steers fed the 40% wet distillers grains compared to dry- rolled- corn. Numeric differences between fat, fiber, and protein treatments were observed. However, none of the four component diets alone were able to explain the energy value associated with wet distillers grains.

Effects Of Feeding Isolated Nutrient Components In Mdgs On Growing Cattle Performance, Brianna B. Conroy, Curtis J. Bittner, Jim C. Macdonald Donald, Matt K. Luebbe, Galen E. Erickson

Nebraska Beef Cattle Reports

An experiment was conducted to evaluate the influence of individual nutrient components in distillers grains on performance of growing calves. A 40% corn control treatment was included for direct comparison to a diet containing 40% modified distillers grains. Four additional treatments were formulated to isolate the contribution of solubles, protein, fiber, and a combination of fiber and solubles on cattle performance. Average daily gains and ending BW were greater, while F:G lower for cattle fed 40% modified distillers grains compared to the corn control. We were able to determine that protein, when overfed, contributes to the higher energy value of …

Beef Fatty Acid Profiles From Steers Finished With De-Oiled Dry Distillers Grains Plus Solubles Vs. A Corn- Based Diet, Katherine I. Domenech, Keni E.Z. Nubito, Galen E. Erickson Erickson, Chris R. Calkins

Nebraska Beef Cattle Reports

A total of 128 steers were fed one of two finishing diets: 50% de-oiled dry distillers grains plus solubles (DDGS) or a corn- based control diet. Carcasses (n = 48) were selected to evaluate the effect of diet on the fatty acid profile of strip loin steaks. Th e C15:0, C16:1, C17:0, and C17:1 were greater for beef from steers finished on the corn- based control diet while the C18:1T, C18:2, C20:3ω6, total trans, ω6 and polyunsaturated fatty acids (PUFA) were greater in beef from cattle finished on 50% de-oiled DDGS. These findings confirm that feeding distillers grains plus solubles …

Accurate Amounts And Nutritive Values Of Corn Residues, Shelby E. Gardine, Andrea K. Watson, Jana L. Harding Harding, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

It is important to have accurate data on the amounts and nutritive values of residues, especially for grazing situations. Ten plants were harvested for each field replication. Statistical analysis suggests 6 to 10 plants are needed to obtain accurate grain yields and accurate amounts of residue. Further laboratory analysis of the leaves and husks suggests that the energy and protein contents of the residue that is consumed is less than previously reported.

The Effect Of Delayed Corn Silage Harvest On Corn Silage Yield And Finishing Performance In Yearling Steers, F. Henry Hilscher, Dirk Burken, Curtis J. Bittner Bittner, Jana L. Harding, Terry J. Klopfenstein, Galen E. Erickson

Nebraska Beef Cattle Reports

A finishing experiment evaluated the effects of harvesting drier corn silage on performance. Factors were corn silage DM (37 or 43%) and inclusion in the finishing diet (15 or 45%). As corn silage inclusion increased, DMI did not diff er, ADG decreased, and F:G increased. As DM of corn silage was increased, no differences in DMI, ADG, or F:G were observed at either 15 or 45% inclusion. Ensiling drier silage increased tonnage with no negative impact on performance.

Effects Of Protein Supplementation In Corn Silage Growing Diets Harvested At 37 Or 43% Dm On Cattle Growth, F. Henry Hilscher, Robert G. Bondurant, Jana L. Harding Harding, Terry J. Klopfenstein, Galen E. Erickson

Nebraska Beef Cattle Reports

A growing study evaluated the effects of harvesting drier corn silage and response to rumen undegradable protein (RUP) supplementation. Corn silage was harvested at 37 or 43% DM from the same fields and protein supplement (high in RUP) was provided at 0.0, 2.5, 5.0, 7.5 or 10.0% of diet DM. Ending BW and ADG were decreased, while F:G was increased, when steers were fed 43% DM silage compared to 37% DM silage (88% silage inclusion). Increasing supplemental RUP in the diet increased ending BW, DMI, and ADG linearly, and decreased F:G linearly. Drier silage had less energy for growing steers …

Student Perceptions And Knowledge Of The Feedlot Industry And The Feedyard Management Specialization Internship, Rachel A. Oglesbee, Meredith L. Bremer, Kari L. Lewis Lewis, Dennis R. Brink, Terry J. Klopfenstein, Jim C. Macdonald, Galen E. Erickson

Nebraska Beef Cattle Reports

A survey was developed for seniors in the undergraduate feedlot management class (ASCI 457) at UNL to gauge interest in feedlot management as a profession and familiarity with the Feedyard Management Internship Program. Th e survey found that students feel the internship is beneficial for a future in production agriculture. Th e internship increases confidence of employment and management skills once participation is complete along with gaining experience. Th e number of positions available and the average salary of feedlot managers are underestimated by students. Recruiting efforts appear to be informing students of the program.

Evaluation Of Distillers Grains Components Singly Or In Combination In A Calf Fed Feedlot Study, Rachel A. Oglesbee, Curtis J. Bittner, F. Henry Hilscher, Galen E. Erickson, Jim C. Macdonald, Matt K. Luebbe

Nebraska Beef Cattle Reports

A finishing study was conducted to determine the value of the fiber, protein, fat, and solubles components from wet distillers grains plus solubles (WDGS) alone or in combination for feedlot cattle in comparison to WDGS diets. The fiber portion alone did not improve F:G. When protein was included in the composite with fiber, F:G improved. With fat and solubles both added separately, F:G continued to improve. None of the components alone could make up the feeding value of WDGS, however the composite diet of fiber, protein, fat, and solubles combined matched the performance observed when WDGS is fed.

Use Of Dietary Nitrate Or Sulfate For Mitigation Of Methane Production By Finishing Steers, Anna C. Pesta, Robert G. Bondurant, Samodha C. Fernando Fernando, Galen E. Erickson

Nebraska Beef Cattle Reports

A finishing study was conducted to evaluate the effects of dietary nitrate and sulfate on methane production in finishing cattle. Both nitrate and sulfate addition decreased DMI and ADG. In diets with no sulfate, addition of nitrate had no impact on emissions, but nitrate and sulfate in combination decreased CH4:CO2. However, neither nitrate nor sulfate had any further impact on methane production. Effect of these compounds may be diet dependent and in this study had little impact on CH4 emissions in finishing cattle.

Methane Production, Diet Digestibility, And Vfa Profile Of Growing Steers Fed High Or Low Quality Forage, A. C. Pesta, M. L. Jolly- Breithaupt, Samodha C. Fernando Fernando, Paul J. Kononoff, Galen E. Erickson

Nebraska Beef Cattle Reports

A headbox calorimeter study evaluated the impacts of forage quality on methane production, diet digestibility, and VFA profile of growing steers. Daily production of methane and carbon dioxide were greater for steers fed high- quality compared to low- quality forages. Th ere was no difference in DM or OM digestibility, likely due to dramatic intake differences, and no difference in the amount of methane produced per unit of OM digested. Methane emissions data from this study agree reasonably well with those obtained by alternate methods previously utilized by this group.

Impact Of Inoculating Corn Silage With Buchnerii 500 On Feedlot Cattle Performance With Or Without Added Yeast Product At Time Of Feeding, Cassandra A. Row, Curtis J. Bittner, Jana L. Harding Harding, James C. Macdonald, Terry J. Klopfenstein, Angel A. Aguilar, Renato J. Schmidt, Galen E. Erickson

Nebraska Beef Cattle Reports

Inoculant, Biotal® Buchneri 500, was used to evaluate effects of silage inoculant on feedlot cattle performance and the inclusion of a yeast product, Levucell- SC. Silage was fed at 15 or 40% inclusion so overall treatment structure was a 2 × 2 × 2 factorial arrangement of treatments. Numerous 3- way interactions were observed, but appear due to inconsistent patterns of treatment eff ects. Feeding silage at 40% increased DMI, decreased ADG, and increased F:G compared to feeding 15% silage. Inoculant or feeding Levucell- SC did not improve performance.

Effect Of Corn Plant Maturity On Yield And Nutrient Quality Of Corn Plants, 2- Year Summary, Cassandra A. Row, Robert G. Bondurant, Andrea K. Watson Watson, Jana Harding, Jim C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson

Nebraska Beef Cattle Reports

Corn plots were serially harvested over 2 years to evaluate changes in nutrient content, digestibility, and yield as plants matured from half- milk line through black layer. In yr 1 (2013), short (102 d) and normal (111 d) season hybrids were grown. Year 2 used 111 d and 112 d hybrids. Silage and grain yield increased until black layer. Silage DM increased with maturity to 42% at black layer. Percent NDF in the stover, NDF- digestibility and overall silage TDN increased quadratically as maturity increased. Th ere is a balance between moisture content, nutrient content, and silage yield, as corn …

Table Of Contents 2016 Nebraska Beef Cattle Report

Nebraska Beef Cattle Reports

No abstract provided.

2016 Nebraska Beef Cattle Report (Complete)

Nebraska Beef Cattle Reports

Contents

Cow/Calf: Effects of Wintering System on Cow and Calf Performance in a Summer-Calving Intensive Production System ● How Many Clean-up Bulls Are Needed after Estrus Synchronization and Artificial Insemination? ● Economics of Rebreeding Non-pregnant Females ● Effect of MGA vs CIDR Estrus Synchronization on Estrus Response and Pregnancy Rates in 311 d Old Beef Heifers ● Comparison of TAI at GnRH Injection and Delayed Insemination of Non-estrus Beef Heifers ● Effect of Dam Age on Offspring Productivity ● Cows with Excess Androgen are Anovulatory and Have Differing Patterns of Progesterone Secretion ● Granulosa Cell Exposure to Excess Androgens Inhibits …

Evaluating A Strategy To Deliver Vaccine To White-Tailed Deer At A Landscape Level, Justin W. Fischer, Chad R. Blass, W. David Walter, Charles W. Anderson, Michael J. Lavelle, Wayne H. Hall, Kurt C. Vercauteren

United States Department of Agriculture Wildlife Services: Staff Publications

Effective delivery of vaccines and other pharmaceuticals to wildlife populations is needed when zoonotic diseases pose a risk to public health and natural resources or have considerable economic consequences. The objective of our study was to develop a bait-distribution strategy for potential delivery of oral bovine tuberculosis (bTB) vaccine to white-tailed deer (Odocoileus virginianus) where deer are reservoirs for the disease. During 17 February and 2 March 2011, we created a grid of experimental bait stations (n=64) on Sandhill Wildlife Management Area, Wisconsin, USA, to assess station densities needed to attract and deliver placebo baits to free-ranging white-tailed …

Environmental Parameters Associated With Stable Fly (Diptera: Muscidae) Development At Hay Feeding Sites, Kristina Friesen, Dennis R. Berkebile, Brian Wienhold, Lisa Durso, Jerry Zhu, David B. Taylor

Department of Entomology: Faculty Publications

Substrates composed of hay residues, dung, and urine accumulate around winter hay feeding sites in cattle pastures, providing developmental habitats for stable flies. The objective of this study was to relate physiochemical and microbial properties of these substrates to the presence or absence of stable fly larvae. Properties included pH, temperature, moisture, ammonium concentration, electrical conductivity, and numbers of coliform, fecal coliform, Escherichia coli, and Enterococcus bacteria. Each physiochemical sample was classified as a function of belonging to one of the three 2-m concentric zones radiating from the feeder as well as presence or absence of larvae. In total, …

Acclimatization Of Coregonus Autumnalis Migratorius (Georgi, 1775) In Some Water Bodies Of The Mongolian Gobi, Auyriin Dulmaa

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Introductions and subsequent acclimatization of the fish Baicalian omul (Coregonus autumnalis migratorius natio possolskii) was carried out in 1980, 1982, and 1986 in the previously fishless lakes of Ulaagchnii Khar, Baga, and Jaahan located in the territory of Gobi region of the Zavhan administrative aimag of Mongolia. Three million larvae of Coregonus autumnalis migratorius natio possolskii were received from the Bolshrechnsky fishery in Buryatya, Russia (DULMAA 1999). The density of distribution was 10-15 thousand units per hectare with an average larvae mass of 0.05 g. The relatively abundant fodder base has facilitated the high rate of growth and …

Got Ap?, Joan Digby

Journal of the National Collegiate Honors Council Online Archive

One of the first questions I ask prospective students is whether they have taken any AP or college courses in high school. The question itself frequently generates lines of tension in a student’s face while parents erupt into proud smiles. The difference can generally tell me whose idea it was to take AP or college courses and to what degree they considered them a benefit in gaining college admission and scholarship funding.

Families, especially those considering sending their children to a private four-year university, need all the help they can get in funding college. At my institution, four years without …

Bat Ectoparasites Of Mongolia, Part 3, Ingo Scheffler, Ariunbold Jargalsaikhan, Idertsogt Bolorchimeg, Annegret Stubbe, Michael Stubbe, Andreas Abraham, K. Thiele

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

The fauna of Mongolian bats and their ectoparasites is not yet fully documented. This study analyzes ectoparasite samples of 15 bat species from diverse taiga, steppe, and desert locations. We recorded 27 parasite species in total and report their abundance, host preference, and occurrence herein. In describing a new bat fly species (Basilia dolchii n. spec.), reporting six parasite species never before recorded in Mongolia, and examining rare host species such as Myotis frater and Murina hilgendorfi, this work expands present knowledge in this research area. To assess respective individual and species-specific parasite loads comprised of different insects …

Exporting Drug-Court Concepts To Traditional Courts: A Roadmap To An Effective Therapeutic Court, Jamey Hueston, Kevin Burke

Court Review: Journal of the American Judges Association

On any given day, in courtrooms across the country, judges witness the unfortunate consequences of drug abuse reflected by some offenders who are in court “nodding out” from a “heroin high” while waiting for their cases to be called. A steady stream of people with untreated mental-health issues also enter courtrooms, often displaying oppositional attitudes, disruptive behavior, and cognitive disabilities. Judges are understandably frustrated with the justice system’s revolving door in which these offenders continuously rotate and with a system that cannot adequately address the numerous complex issues, insufficient life skills, and collateral problems that contribute to drug abuse or …

Mapping Qtls And Association Of Differentially Expressed Gene Transcripts For Multiple Agronomic Traits Under Different Nitrogen Levels In Sorghum, Malleswari Gelli, Sharon E. Mitchell, Kan Liu, Thomas E. Clemente, Donald P. Weeks, Chi Zhang, David R. Holding, Ismail M. Dweikat

Department of Agronomy and Horticulture: Faculty Publications

Background: Sorghum is an important C₄ crop which relies on applied Nitrogen fertilizers (N) for optimal yields, of which substantial amounts are lost into the atmosphere. Understanding the genetic variation of sorghum in response to limited nitrogen supply is important for elucidating the underlying genetic mechanisms of nitrogen utilization.

Results: A bi-parental mapping population consisting of 131 recombinant inbred lines (RILs) was used to map quantitative trait loci (QTLs) influencing different agronomic traits evaluated under normal N (100 kg.ha⁻¹ fertilizer) and low N (0 kg.ha⁻¹ fertilizer) conditions. A linkage map spanning 1614 cM was developed …

Effects Of Sorghum Wet Distillers Grains Plus Solubles In Steam-Flaked Corn–Based Finishing Diets On Steer Performance, Carcass Characteristics, And Digestibility Characteristics, E. K. Buttrey, K. H. Noel, F. T. Mccollum Iii, N. A. Cole, L. O. Tedeschi, James C. Macdonald

Department of Animal Science: Faculty Publications

Two studies were conducted to evaluate the effects of sorghum wet distillers grains (SWDGS) in finishing diets on steer performance, carcass characteristics, and nutrient digestibility. In Exp. 1, 240 steers (initial BW = 379 ± 1 kg) were fed steam-flaked corn–based diets with or without 25% SWDGS and 7.5, 10.0, or 12.5% alfalfa hay. There were no effects of alfalfa hay concentration on BW, DMI, ADG, or G:F (P ≥ 0.16). Including SWDGS reduced (P ≤ 0.05) ADG and G:F. Fat thickness decreased (P = 0.03) and DP tended to decrease (P = 0.09) linearly as level of alfalfa hay …

Effects Of Increasing Soybean Hulls In Finishing Diets With Wet Or Modified Distillers Grains Plus Solubles On Performance And Carcass Characteristics Of Beef Steers, Curtis Bittner, Brandon L. Watson, C. J. Schneider, Dirk Burken, L. J. Johnson, Terry J. Klopfenstein, Galen E. Erickson

Department of Animal Science: Faculty Publications

Two experiments evaluated feeding soybean hulls (SBH) in finishing diets that contain distillers grains plus solubles on performance and carcass characteristics. Dietary concentrations of SBH were 0, 12.5, 25, and 37.5% of diet DM. In Exp. 1, 167 crossbred yearling steers (395 ± 22 kg of BW) were fed for 117 d in a randomized block design in which pelleted SBH replaced dry-rolled corn. All diets contained 25% modified distillers grains plus solubles, 15% corn silage, and 5% liquid supplement. As SBH concentration increased, DMI decreased linearly (P = 0.04). Gain and G:F decreased linearly (P < 0.01) in response to increasing concentrations of SBH, which decreased relative energy value from 91 to 79% of corn. Hot carcass weight linearly decreased (P < 0.01) by 24 kg as SBH increased. In Exp. 2, a randomized block design used 160 backgrounded steer calves (363 ± 16 kg of BW) in a 138-d finishing study with 0, 12.5, 25, or 37.5% SBH in the meal form. Basal ingredients consisted of a 1:1 ratio of high-moisture corn and dry-rolled corn, 40% wet distillers grains plus solubles, 8% sorghum silage, and 4% dry meal supplement. There was a tendency (P = 0.12) for a quadratic increase in ADG and G:F as dietary SBH increased, with numerically greatest ADG and G:F with 12.5% SBH. Feeding 12.5 to 25% SBH with 40% wet distillers grains plus solubles (Exp. 2) had little effect on performance but decreased ADG and G:F in diets with 25% modified distillers grains plus solubles (Exp. 1).

Effects Of Fat And/Or Methionine Hydroxy Analog Added To A Molasses-Urea-Based Supplement On Ruminal And Postruminal Digestion And Duodenal Flow Of Nutrients In Beef Steers Consuming Low-Quality Lovegrass Hay, R. Lopez, G. D. Bernhard, J. E. Guerra-Liera, S. A. Soto-Navarro, L. A. Balstad, M. K. Petersen, D. V. Dhuyvetter, M. S. Brown, C. R. Krehbiel

Department of Animal Science: Faculty Publications

Five crossbred beef steers (initial BW = 338.6 ± 7.8 kg) fitted with ruminal and duodenal cannulas were used in a 5 × 5 Latin square design experiment to evaluate the effects of methionine hydroxy analog (MHA) and/or yellow grease (fat) added to a molassesurea- based supplement on intake and characteristics of digestion. Steers were fed low-quality hay (long-stem lovegrass Eragrostis curvula: 3.3% CP, 76.8% NDF; DM basis) ad libitum and supplemented with 0.91 kg/d (as fed) of 1 of 4 supplements in a 2 × 2 + 1 factorial arrangement of treatments. Supplemental treatments were 1) control (no supplement, …