Meat Science Commons^™

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 …

Cows With Excess Androgen Are Anovulatory And Have Differing Patterns Of Progesterone Secretion, Renata Spuri- Gomes, Sarah C. Tenley, Mohamed A. Abedal- Majed Majed, Scott G. Kurz, Jeff Bergman, Jennifer R. Wood, Andrea S. Cupp

Nebraska Beef Cattle Reports

Within the physiology herd, a group of cows that have excess androgen (androstenedione, A4) in the dominant follicle and a 17% reduction in calving rate have being identified. Thus, our objective was to determine follicular dynamics (follicle growth) and progesterone (P4) concentrations in High A4 cows to determine if they were anovulatory. High A4 cows had more persistent dominant follicles and either did not display estrus and ovulated at an inappropriate time or did not ovulate compared with Low A4 cows (Controls). Furthermore, P4 concentrations had reduced peak values and were maintained longer in High vs Low A4 cows which …

Statistics Used In The Nebraska Beef Report And Their Purpose

Nebraska Beef Cattle Reports

Th e purpose of beef cattle and beef product research at University of Nebraska– Lincoln is to provide reference information that represents the various populations (cows, calves, heifers, feeders, carcasses, retail products, etc.) of beef production. Obviously, the researcher cannot apply treatments to every member of a population; therefore, he/she must sample the population. Th e use of statistics allows the researcher and readers of the Nebraska Beef Report the opportunity to evaluate separation of random (chance) occurrences and real biological effects of a treatment. Following is a brief description of the major statistics used in the beef report. For …

Effects Of Supplementing Omnigen- Af® With Or Without Ractopamine Hydrochloride On Performance And Carcass Characteristics Of Feedlot Steers, Kelby M. Sudbeck, Robert G. Bondurant, Troy J. Wistuba Wistuba, Kevin C. Dehaan, James C. Macdonald, Galen E. Erickson, Matt K. Luebbe

Nebraska Beef Cattle Reports

An experiment was used to evaluate feeding OmniGen- AF during the last 28 or 56 days of the finishing phase in diets with or without Optafl exx. Th ere were no differences in steer performance or carcass characteristics when OmniGen- AF was fed alone or in combination with Optaflexx. Feeding Optaflexx increased ADG, HCW, and improved F:G. Supplementation of Optafl exx also increased the rate of accretion in LM area, but decreased the accretion of intramuscular fat percentage. These data illustrate the repartitioning of nutrients between lean and fat tissues when Optaflexx is fed.

Observations Of Forage Quality And Calf Gain When Grazing Double Cropped Forage Following Wheat Harvest, Kristen M. Ulmer, Robert G. Bondurant, Jana L. Harding Harding, Gary Lesoing, M. E. Drewnoski, James C. Macdonald

Nebraska Beef Cattle Reports

A 2- year cover crop grazing study was conducted following wheat harvest to evaluate the quality and yield of a 5- way forage annual forage mix in addition to cattle performance. In 2013, gain of steer calves was 2.03 lb/day, while 2014 steer calves had gain of 1.55 lb/day. Above ground forage production was 1.08 and 1.72 tons/acre in 2013 and 2014, respectively. Daikon radish and purple top turnip (brassicas) were high in sulfur and low in fiber. Fall forage production of brassica and oat based mixes following wheat grain harvest provide 97 to 137 lb of gain per acre.

Effect Of Corn Residue Harvest Method On In Vivo And In Vitro Digestibility, Janessa J. Updike, Levi J. Mcphillips, Melissa L. Jolly- Breithaupt Breithaupt, Jana L. Harding, Terry J. Klopfenstein, Jim C. Macdonald

Nebraska Beef Cattle Reports

A digestion study was conducted using 18 crossbred wether lambs to evaluate the effects of corn residue harvesting method and ensiling on the digestibility of corn residue. Husks had the greatest digestibility compared to any of the harvesting methods. No differences were observed for the digestibility of husklage, ensiled husklage, or stalklage. None of the harvest methods resulted in residue digestibilities similar to husks.

Effects Of Wintering System On Cow And Calf Performance In A Summer-Calving Intensive Production System, Jason M. Warner, Curtis J. Bittner, Robert G. Bondurant Bondurant, Karla H. Jenkins, Richard J. Rasby, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

Effects of wintering cow- calf pairs on cornstalks or in a drylot on cow- calf performance and reproduction in a summer-calving intensively managed cowherd were evaluated at two locations. Cow body condition score change was not different between treatments in western Nebraska, but was greater for pairs fed in a drylot in eastern Nebraska. In western Nebraska, calf gain and weights were not different between treatments, but were greater for drylot calves in eastern Nebraska. Initial data indicate that wintering pairs on cornstalks may decrease cow performance and calf gain. If reproduction is adequate and grazing is not impeded, wintering …

Evaluation Of Varying Corn Grain (And Byproduct) Inclusion In Beef Cattle Finishing Diets, Andrea K. Watson, Matt K. Luebbe, Galen E. Erickson Erickson

Nebraska Beef Cattle Reports

A pooled- analysis of UNL feedlot trials examined the impact of starch (corn grain) on cattle performance. Cattle age (calf- fed or yearling) affected DMI, ADG, and F:G, but not marbling score or fat depth. Intake, ADG, F:G, and fat depth were optimized with 50– 70% corn grain in the diet. Marbling was not maximized until the diet contained > 75% corn. Removing either all the corn or all the byproduct from diets did not maximize performance. Including a minimum of 20% byproduct and 20% corn in the diet is biologically advantageous, while the remaining 60% of the diet is flexible …

Effect Of Pelleted Feed Products And Bambermycins On Performance When Fed To Cattle Grazing Residue, Cody A. Welchons, Robert G. Bondurant, F. Henry Hilscher Hilscher, Jim C. Macdonald, Galen E. Erickson, Cody A. Nichols

Nebraska Beef Cattle Reports

Steer calves grazing non- irrigated corn residue were supplemented with a corn residue and by- product pellet at 0.3, 0.7, or 1.1% of BW. Th e, pellet was formulated to deliver either 0 or 10 mg/steer daily of bambermycins (Gainpro). Th ere was no interaction between bambermycins inclusion and level of supplementation. Likewise, there was no effect of bambermycins on ending BW or ADG. As level of supplement increased, both ending BW and ADG increased linearly.

Performance And Economics Of Supplementing Yearlings On Smooth Bromegrass Pastures, Cody A. Welchons, Robert G. Bondurant, Terry J. Klopfenstein Klopfenstein, Jim C. Macdonald, Andrea K. Watson

Nebraska Beef Cattle Reports

Ten years of performance data from 2005– 2014 were summarized to evaluate the effects of distillers grains plus solubles supplementation or fertilization of smooth bromegrass on performance and economic profitability of yearling steers with corn priced at either $3,4, or 5/bu and DGS priced at either 95, 105, or 115% the price of corn. Steers supplemented with distillers grains on non- fertilized smooth bromegrass had greater ADG (2.37 lb/d) compared with unsupplemented steers (1.69 lb/d). Unsupplemented steers grazing fertilized and nonfertilized pasture had similar gains; however, steers grazing fertilized pasture were more profitable due to savings in land rent. Supplemented …

Effect Of Pelleted Byproducts On Performance When Fed To Growing Cattle, Cody A. Welchons, Curtis J. Bittner, Dirk Burken Burken, Jim C. Macdonald, Galen E. Erickson

Nebraska Beef Cattle Reports

Heifers fed a basal diet of either low or high quality forage were supplemented with a corn residue and corn by- product pellet at 0, 0.5, or 1.0% of BW. A linear increase in final BW, ADG, and feed efficiency was observed as supplement increased for heifers fed high quality forage while a quadratic response was observed for those fed low quality forage. Increasing supplement linearly decreased daily average forage dry matter intake from 16.5 lb to 12.6 lb at 0 and 1.0% of BW, respectively. Accordingly, as supplement intake increased, total dry matter intake increased linearly from 16.5 lb …

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 …

Dna Barcoding Reveals Mislabeling Of Game Meat Species On The U.S. Commercial Market, Charles Quinto, Rebecca Tinoco, Rosalee S. Hellberg

Food Science Faculty Articles and Research

Game meats represent a valuable specialty market in the United States that has high economic incentives associated with mislabeling. However, there is limited information on this topic. The purpose of this study was to conduct a market survey of game meats sold within the United States and identify instances of mislabeling using DNA barcoding. Products were also examined for the presence of threatened or endangered species. Fifty-four samples of whole-cut game meats were collected from online distributors in the United States and sequenced across a 658 base-pair region of the cytochrome c oxidase subunit I (COI) gene. The resulting DNA …

Identification Of Species In Ground Meat Products Sold On The U.S. Commercial Market Using Dna-Based Methods, Dawn Kane, Rosalee S. Hellberg

Food Science Faculty Articles and Research

The objective of this study was to test a variety of ground meat products sold on the U.S. commercial market for the presence of potential mislabeling. Forty-eight ground meat samples were purchased from online and retail sources, including both supermarkets and specialty meat retailers. DNA was extracted from each sample in duplicate and tested using DNA barcoding of the cytochrome c oxidase I (COI) gene. The resulting sequences were identified at the species level using the Barcode of Life Database (BOLD). Any samples that failed DNA barcoding went through repeat extraction and sequencing, and due to the possibility of a …

Differential Contribution Of Genomic Regions To Marked Genetic Variation And Prediction Of Quantitative Traits In Broiler Chickens, Rostam Abdollaha- Arpanahi, Gota Morota, Bruno D. Valente, Andreas Kranis, Guilherme J. M. Rosa, Daniel Gianola

Department of Animal Science: Faculty Publications

Background: Genome-wide association studies in humans have found enrichment of trait-associated single nucleotide polymorphisms (SNPs) in coding regions of the genome and depletion of these in intergenic regions. However, a recent release of the ENCyclopedia of DNA elements showed that ~80 % of the human genome has a biochemical function. Similar studies on the chicken genome are lacking, thus assessing the relative contribution of its genic and non-genic regions to variation is relevant for biological studies and genetic improvement of chicken populations. Methods: A dataset including 1351 birds that were genotyped with the 600K Affymetrix platform was used. We partitioned …

Epds And Risk, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

About 30 years ago there was concern in both the beef and dairy industries that too much emphasis was being given to accuracy of genetic evaluation. This article will discuss attempts to reduce emphasis on accuracy and, thus increase emphasis on the predictor of genetic value itself which is commonly known as estimated breeding value (EBV). Accuracy is a key component of more useful measures of risk such as standard error of prediction which can be used to create confidence ranges in units of measurement for true breeding value based on the EBV and the standard error of prediction. The …

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).