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Effects Of Roughage Source And Level With The Inclusion Of Wet Distillers Grains On Ruminal Metabolism And Nutrient Digestibility, Josh R. Benton, Galen E. Erickson, Terry J. Klopfenstein, Nathan F. Meyer, Crystal D. Buckner
Effects Of Roughage Source And Level With The Inclusion Of Wet Distillers Grains On Ruminal Metabolism And Nutrient Digestibility, Josh R. Benton, Galen E. Erickson, Terry J. Klopfenstein, Nathan F. Meyer, Crystal D. Buckner
Nebraska Beef Cattle Reports
Six ruminally cannulated steers were used in a 6 x 6 Latin square with treatments arranged as a 2 x 3 factorial with alfalfa hay or cornstalks included at a normal, low or zero level on an equal neutral detergent fiber (NDF) basis. The base finishing diet contained 30% wet distillers grains plus solubles (WDGS). No source x level interactions were observed. Roughage source had no effect on nutrient intake, dry matter (DM) and organic matter (OM) digestibility or ruminal pH. Digestibility of NDF tended to be higher for alfalfa hay compared to cornstalks. Ruminal pH, DMI and NDF intake …
An Economic Budget For Determining Co-Product Storage Costs, Josie Waterbury, Darrell R. Mark, Richard J. Rasby, Galen E. Erickson
An Economic Budget For Determining Co-Product Storage Costs, Josie Waterbury, Darrell R. Mark, Richard J. Rasby, Galen E. Erickson
Nebraska Beef Cattle Reports
Co-Product STORE — Storage To Optimize Ration Expenses — is a spreadsheet designed to quantify the costs of co-product storage. It allows producers to analyze and evaluate specific storage scenarios in response to changing market conditions using different storage methods. Two storage examples (bunker and silo bag) are evaluated to illustrate how the spreadsheet estimates storage costs.
Replacing Fertilizer Nitrogen With Dried Distillers Grains Supplement To Yearling Steers Grazing Bromegrass Pastures: Daily Gain And Nitrogen Use Efficiency, Matthew A. Greenquist, Terry J. Klopfenstein, Walter H. Schacht, Galen E. Erickson, Kyle J. Vander Pol, Matt K. Luebbe, Kelly Brink, Andrea K. Schwarz, Leonard B. Baleseng
Replacing Fertilizer Nitrogen With Dried Distillers Grains Supplement To Yearling Steers Grazing Bromegrass Pastures: Daily Gain And Nitrogen Use Efficiency, Matthew A. Greenquist, Terry J. Klopfenstein, Walter H. Schacht, Galen E. Erickson, Kyle J. Vander Pol, Matt K. Luebbe, Kelly Brink, Andrea K. Schwarz, Leonard B. Baleseng
Nebraska Beef Cattle Reports
In a three-year study, corn-dried distillers grains plus solubles (DDGS) were evaluated as a substitute for forage and nitrogen (N) fertilizer in yearling steers grazing smooth bromegrass in eastern Nebraska. Stocking rate increased with N fertilization and DDGS, and average daily gain (ADG) increased with DDGS. Total gain per acre increased by 53% with N fertilization and 105% with DDGS supplementation. N use efficiency was 139% greater per acre with DDGS supplementation compared to fertilizing with N alone. Feedlot ADG was similar among treatments with steers maintaining their BW advantage through the finishing phase.
Replacing Fertilizer Nitrogen With Dried Distillers Grains Supplement To Yearling Steers Grazing Bromegrass Pastures: Economics And Modeling, Matthew A. Greenquist, Terry J. Klopfenstein, Walter H. Schacht, Galen E. Erickson
Replacing Fertilizer Nitrogen With Dried Distillers Grains Supplement To Yearling Steers Grazing Bromegrass Pastures: Economics And Modeling, Matthew A. Greenquist, Terry J. Klopfenstein, Walter H. Schacht, Galen E. Erickson
Nebraska Beef Cattle Reports
An economic analysis of a three-year study evaluated use of N fertilizer and dried distillers grains plus solubles (DDGS) supplementation to yearling steers grazing smooth bromegrass in eastern Nebraska (Nebraska Beef Report, 2009, pp. 26-28). Costs of gain tended to be lower for cattle on fertilized pastures. Grazing profitability was lowest for cattle on non-fertilized pastures, intermediate for cattle supplemented with DDGS, and highest for cattle on fertilized pastures. The weight advantage (9%) of steers supplemented with DDGS during the grazing period was maintained through the finishing period, leading to greater profitability. Profitability for steers supplemented with DDGS at the …
2009 Beef Cattle Report
Nebraska Beef Cattle Reports
Table of Contents 2009 Nebraska Beef Cattle Report
Cow/Calf
Effect of Winter Grazing System and Supplementation on Beef Cow and Progeny Performance
Effect of Estrus Synchronization with a Single Injection of Prostaglandin During Natural Service Mating
Limit Feeding Beef Cows with Bunkered Wet Distillers Grains Plus Solubles or Distillers Solubles
Estimating Livestock Forage Demand: Defining the Animal Unit
Moving Beyond Weight as the Only Predictor of Breeding Readiness: Using a Breeding Maturity Index
The Effects of Breeding Maturity on Dystocia and Rebreeding of the Primiparous Beef Female
An Economic Budget for Determining Co-Product Storage Costs
Growing
Replacing Fertilizer Nitrogen with …
Effect Of Winter Grazing System And Supplementation On Beef Cow And Progeny Performance, Richard N. Funston, Jeremy Martin, Don C. Adams, Daniel Larson
Effect Of Winter Grazing System And Supplementation On Beef Cow And Progeny Performance, Richard N. Funston, Jeremy Martin, Don C. Adams, Daniel Larson
Nebraska Beef Cattle Reports
Cows grazed winter range (WR) or corn residue (CR) during late gestation and received protein supplement (PS) of 1 lb/day 28% CP cubes or no supplement (NS). Pre-calving and pre-breeding body weight (BW) and body condition score (BCS) were greater for PS and CR cows. Pregnancy rate was not affected by treatments. Calf weaning BW was greater for PS cows that grazed WR. Final BW and 12th rib fat tended to be greater for steers from cows on CR. Steers from PS cows graded a higher proportion USDA Choice or greater. More heifers were pubertal before breed¬ing from dams receiving …
Wet Distillers Grains Plus Solubles Or Solubles In Feedlot Diets Containing Wet Corn Gluten Feed, Virgil R. Bremer, Joshua R. Benton, Matt K. Luebbe, Kathryn J. Hanford, Galen E. Erickson, Terry J. Klopfenstein, Rick Stock
Wet Distillers Grains Plus Solubles Or Solubles In Feedlot Diets Containing Wet Corn Gluten Feed, Virgil R. Bremer, Joshua R. Benton, Matt K. Luebbe, Kathryn J. Hanford, Galen E. Erickson, Terry J. Klopfenstein, Rick Stock
Nebraska Beef Cattle Reports
Effects of the addition of 0% to 40% wet distillers grains plus solubles (WDGS) or 0% to 20% condensed corn distillers solubles (CCDS) to feedlot diets containing high moisture corn (HMC) and 35% wet corn gluten feed (WCGF) were evaluated. As WDGS replaced HMC, average daily gain (ADG) decreased linearly and dry matter intake (DMI) tended to decrease. Replacement of HMC with WDGS in the 35% WCGF diet caused a linear decrease in ADG and a trend for a linear decrease in DMI. When CCDS replaced HMC, no difference in steer performance was observed. The sulfur content, rather than fat …
Effects Of Feeding Wet Distillers Grains Plus Solubles On Feedlot Manure Value, Virgil R. Bremer, Terry J. Klopfenstein, Galen E. Erickson, Richard K. Koelsch, Raymond E. Massey, Judson Vasconcelos
Effects Of Feeding Wet Distillers Grains Plus Solubles On Feedlot Manure Value, Virgil R. Bremer, Terry J. Klopfenstein, Galen E. Erickson, Richard K. Koelsch, Raymond E. Massey, Judson Vasconcelos
Nebraska Beef Cattle Reports
Feeding wet distillers grains plus solubles (WDGS) improves the fertilizer value and net value of feedlot manure for all feedlot sizes. The net fertilizer value of feedlot manure increased 375% to 550% since 2006. Valuing manure at 2008 fertilizer nutrient prices and feeding 20% or 40% WDGS instead of feeding a corn-based diet improved profitability by $7 to $17 per steer finished ($4 to $11 per ton of manure).
Effects Of Environmental Factors On Body Temperature Of Feedlot Cattle, Rodrigo Arias, Terry L. Mader
Effects Of Environmental Factors On Body Temperature Of Feedlot Cattle, Rodrigo Arias, Terry L. Mader
Nebraska Beef Cattle Reports
Tympanic temperature of 32 Angus steers (919 ± 7.5 lb) was measured with Micro-T ibuttons or the Stowaway data loggers. Environmental variables were collected using weather stations located in the pens to evaluate factors influencing body temperature. A multiple regression analysis was used to evaluate the effects of these factors on body temperature of feedlot cattle. Tympanic temperature tended to be higher for Stowaway compared to Micro-T data loggers (102.6 vs. 102.41°F ± 0.072, respectively; P = 0.053). Tympanic temperature was driven primarily by outgoing solar radiation and wind speed (R2=0.79).
Effects Of Surface Soil Temperature On Daily Water Intake In Feedlot Cattle, Rodrigo Arias, Terry L. Mader
Effects Of Surface Soil Temperature On Daily Water Intake In Feedlot Cattle, Rodrigo Arias, Terry L. Mader
Nebraska Beef Cattle Reports
The relationships among soil surface temperature (SST), soil temperature (ST) (4 inches depth) and daily water intake (DWI) were studied using data collected between 2004 and 2006. The equations obtained through simple and polynomial linear regression were evalu¬ated using data collected during the summer 2007. An overall model (May-October) and a summer model (June-August) were developed. The best fit was reached with the overall model using SST in a quadratic model (r2 = 0.86), whereas the summer model fit linearly with SST (r2 = 0.70). Both models tend¬ed to slightly over-predict DWI (13.5% and 12.5%, respectively).
A Rapid Method To Evaluate Oxidation Capacity Of Fresh Beef, Lasika S. Senaratne, Chris R. Calkins, Amilton S. De Mello Jr., Timothy P. Carr
A Rapid Method To Evaluate Oxidation Capacity Of Fresh Beef, Lasika S. Senaratne, Chris R. Calkins, Amilton S. De Mello Jr., Timothy P. Carr
Nebraska Beef Cattle Reports
A method to determine the capacity of beef to oxidize was developed by spectrophotometrically measuring the formation of conjugated dienes after inducing oxidation. The assay was tested by comparing the oxidation capacity and oxidation products (2-thiobabutaric acid reactive substances) of beef stored in a cooler with various packaging types. There was an inverse relationship between oxidation capacity and oxidation products. As oxidation increases, the oxidation capacity of samples declines. This method of measuring oxidation capacity provides useful information without having to wait for oxidation to occur.
Effect Of Wet Distillers Grain Feeding Supplemented With Vitamin E On Case Life Of Beef, Lasika S. Senaratne, Chris R. Calkins, Amilton S. De Mello Jr., Gary A. Sullivan, Galen E. Erickson
Effect Of Wet Distillers Grain Feeding Supplemented With Vitamin E On Case Life Of Beef, Lasika S. Senaratne, Chris R. Calkins, Amilton S. De Mello Jr., Gary A. Sullivan, Galen E. Erickson
Nebraska Beef Cattle Reports
Aged (7 and 28 days) strip loins (m. Longissimus lumborum) from 90 yearling steers were used to assess the effect of supplemental vitamin E in diets containing wet distillers grains (WDG) with or without distillers solubles on surface discoloration of steaks during retail display. The greatest negative effects occurred as a result of aging, followed by the presence of solubles and then by the level of WDG. As discoloration increased, the importance of vitamin E in reducing discoloration also increased. Feeding WDG diets supplemented with vitamin E mitigates the surface discoloration of aged beef strip loin steaks during retail …
Impact Of A New Direct-Fed Microbial On Intake And Ruminal Ph, Kelsey Rolfe, Nathan Meyer, Galen E. Erickson, Terry J. Klopfenstein, Ryan Mass
Impact Of A New Direct-Fed Microbial On Intake And Ruminal Ph, Kelsey Rolfe, Nathan Meyer, Galen E. Erickson, Terry J. Klopfenstein, Ryan Mass
Nebraska Beef Cattle Reports
Nine ruminally fistulated steers were used in a metabolism experiment to evaluate the effect of a new direct-fed microbial (DFM) on acidosis. No statistical differences were observed in dry matter intake (DMI). Minimum pH was significantly lower in steers fed the DFM during grain adaptation, resulting in a greater change in ruminal pH and pH variance for steers fed DFM during grain adaptation. However, once steers were on the finishing diet, no differences were detected due to treatment.
Effects Of Substituting Wet Distillers Grains With Solubles In A Wet Corn Gluten Feed-Based Diet On Finishing Performance, Cody Nichols, Matt K. Luebbe, Galen E. Erickson, Rick Stock, Terry J. Klopfenstein
Effects Of Substituting Wet Distillers Grains With Solubles In A Wet Corn Gluten Feed-Based Diet On Finishing Performance, Cody Nichols, Matt K. Luebbe, Galen E. Erickson, Rick Stock, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
A finishing study evaluated feeding a wet corn gluten feed (WCGF) ration containing no high moisture corn with varying inclusion levels of wet distillers grains plus solubles (WDGS), as well as a control diet containing 20% WDGS and 20% WCGF. Wet distillers grains with solubles replaced WCGF at 10%, 20%, 30% and 40% of the diet. As WDGS replaced WCGF, feed-to-gain ratio (F:G) decreased linearly. However, two steers developed polioencephalomalacia on the treatment that contained 40% WDGS. Steers fed the control diet containing 40% byproduct had greater average daily gain (ADG) and lower F:G than the average of all WCGF:WDGS …
Effects Of Rumensin® And Tylan® In Finishing Diets With Wet Distillers Grains Plus Solubles, Nathan Meyer, Galen E. Erickson, Terry J. Klopfenstein, Joshua R. Benton, Matt K. Luebbe, Scott Laudert
Effects Of Rumensin® And Tylan® In Finishing Diets With Wet Distillers Grains Plus Solubles, Nathan Meyer, Galen E. Erickson, Terry J. Klopfenstein, Joshua R. Benton, Matt K. Luebbe, Scott Laudert
Nebraska Beef Cattle Reports
A total of 3,632 crossbred steers at three different sites (Nebraska, Colorado and Oklahoma) were utilized in a randomized complete block design (RCBD) study. Data were combined for the Colorado and Oklahoma trials. Steers were fed one of five treatments: 1) Traditional corn diet with Rumensin and Tylan (CORN+RT); 2) Wet distillers grains plus solubles (WDGS); 3) WDGS with Rumensin (WDGS+R); 4) WDGS with Rumensin and Tylan (WDGS+RT); and 5) WDGS with expanded dose range of Rumensin (44.4 g/ton) and Tylan (WDGS+HIRT) to evaluate the effects of Rumensin and Tylan in feedlot diets containing WDGS. In WDGS diets, feed-to-gain ratio …
Effect Of Dietary Cation-Anion Difference On Feedlot Performance, Nitrogen Mass Balance And Manure Ph In Open Feedlot Pens, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein, Matthew A. Greenquist, Joshua R. Benton
Effect Of Dietary Cation-Anion Difference On Feedlot Performance, Nitrogen Mass Balance And Manure Ph In Open Feedlot Pens, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein, Matthew A. Greenquist, Joshua R. Benton
Nebraska Beef Cattle Reports
Two experiments were conducted to evaluate the effect of dietary cation-anion difference (DCAD) at two levels (-16 and +20 mEq) on feedlot performance and nutrient mass balance in open feedlots. Decreasing DCAD did not negatively impact cattle performance or carcass characteristics. Feeding negative DCAD diets resulted in lower manure pH in both the winter and summer experiments. Final soil core pH was reduced only in the winter experiment. Percentage of N lost was not influenced by DCAD in either experiment. The decrease in manure pH is likely not enough to reduce the amount of N lost in open feedlot pens.
Effect Of Estrus Synchronization With A Single Injection Of Prostaglandin During Natural Service Mating, Daniel Larson, Jacqueline A. Musgrave, Richard N. Funston
Effect Of Estrus Synchronization With A Single Injection Of Prostaglandin During Natural Service Mating, Daniel Larson, Jacqueline A. Musgrave, Richard N. Funston
Nebraska Beef Cattle Reports
Records from unsynchronized cows (n = 2073; 60-day breeding season) were compared with records from synchronized cows (n = 517; 45-day breeding season) collected between 2000 and 2006. A single injection of prostaglandin F2α was administered approximately 108 hours after bull turn-in to synchronize estrus in spring calving mature beef cows. Estrus synchronization increased the percentage of cows calving in the first 21 days without affecting pregnancy rates. However, weaning BW of calves was not significantly different. Estrus synchronization improves synchrony of calving in a shorter breeding season with similar overall pregnancy rates.
Feeding Distillers Grains And E. Coli O157:H7, Terry J. Klopfenstein, David R. Smith, Galen E. Erickson, Rodney A. Moxley
Feeding Distillers Grains And E. Coli O157:H7, Terry J. Klopfenstein, David R. Smith, Galen E. Erickson, Rodney A. Moxley
Nebraska Beef Cattle Reports
The diet of feedlot cattle may affect the bacterial population in the hindgut, includingE. coli O157:H7. Some research studies have shown a relationship between feeding of distillers grains and E. coli O157:H7 shedding. However, other studies do not show the same relationship. Our evaluation of research indicates feeding distillers grains is not related to 2007 ground beef recalls. Furthermore, interventions such as vaccination are more important than identifying various feedstuffs that may influence shedding.
Using Wet Corn Gluten Feed To Adapt Cattle To Finishing Diets, Taia Huls, Matt K. Luebbe, William Griffin, Galen E. Erickson, Terry J. Klopfenstein, Rick Stock
Using Wet Corn Gluten Feed To Adapt Cattle To Finishing Diets, Taia Huls, Matt K. Luebbe, William Griffin, Galen E. Erickson, Terry J. Klopfenstein, Rick Stock
Nebraska Beef Cattle Reports
A feedlot trial was conducted to determine if wet corn gluten feed (WCGF) instead of forage could be used to adapt cattle to finishing rations and if this is economically feasible. Treatments were applied only during grain adaptation (26 days), and all steers were finished on a common diet (147 days) containing 35% WCGF. Steers adapted using WCGF had greater ADG and lower F:G. Treatment had no effect on carcass quality. Profits were higher for steers adapted to finishing diets using WCGF rather than those adapted with alfalfa hay.
Summary Of Grazing Trials Using Dried Distillers Grains Supplementation, William Griffin, Virgil R. Bremer, Terry J. Klopfenstein, Leslie Aaron Stalker, Lyle Lomas, Joe Moyer, Galen E. Erickson
Summary Of Grazing Trials Using Dried Distillers Grains Supplementation, William Griffin, Virgil R. Bremer, Terry J. Klopfenstein, Leslie Aaron Stalker, Lyle Lomas, Joe Moyer, Galen E. Erickson
Nebraska Beef Cattle Reports
A meta-analysis of grazing trials in which cattle were supplemented with dried distillers grains with solubles (DDGS) was conducted to determine effects of supplementation on average daily gain (ADG) and final BW in pasture grazing situations. Additionally, pen studies were evaluated to determine the effects of DDGS supplementation on cattle intake, forage replacement, ADG and final BW. In both the pasture and the pen studies, ADG and final BW increased quadratically with increased level of DDGS supplementation. Feeding DDGS decreased forage intake quadratically; however, total intake for cattle supplemented DDGS increased quadratically with increased level of supplementation.
Effects Of Feeding High Levels Of Byproducts In Different Combinations To Finishing Steers, Mallorie Wilken, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein, Joshua R. Benton
Effects Of Feeding High Levels Of Byproducts In Different Combinations To Finishing Steers, Mallorie Wilken, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein, Joshua R. Benton
Nebraska Beef Cattle Reports
A finishing experiment was conducted to determine the effects of feeding wet distillers grains plus solubles (WDGS) and wet corn gluten feed (WCGF) with or without corn on feedlot performance and economics. Six treatment diets were evaluated: 1) 83% corn; 2) 44% WDGS and 44% corn; 3) 33% WDGS, 33% WCGF and corn; 4) 33% WDGS, 33% WCGF and soyhulls; 5) 44% WDGS and 44% WCGF; and 6) 66% WDGS and grass hay. The highest average daily gain (ADG) and lowest feed-to-gain ratio (F:G) were observed with cattle fed 44% WDGS and corn. The poorest ADG and F:G were ob-served …
Comparison Of Dry Distillers Or Modified Wet Distillers Grains Plus Solubles In Wet Or Dry Forage Based Diets, Mallorie Willken, Terry L. Mader, Galen E. Erickson, Leslie J. Johnson
Comparison Of Dry Distillers Or Modified Wet Distillers Grains Plus Solubles In Wet Or Dry Forage Based Diets, Mallorie Willken, Terry L. Mader, Galen E. Erickson, Leslie J. Johnson
Nebraska Beef Cattle Reports
Modified wet distillers grains plus solubles (MDGS) or dry distiller grains plus solubles (DDGS) in combination with wet or dry forages were fed to growing steer calves (n =192). They were fed one of four treatments in a 2 x 2 factorial arrangement with factors as wet or dry forage and MDGS or DDGS for 105 days. Gain and feed-to-gain ratio (F:G) of steers fed MDGS were similar to those fed DDGS. Feeding wet forage significantly improved average daily gain (ADG) and F:G compared to feeding dry forage, which likely reflects forage quality in this study.
An Economic Overview Of Ethanol Co-Product Utilization In Nebraska, Josie Waterbury, Darrell R. Mark, Sarah Thoms, Galen E. Erickson, Terry J. Klopfenstein
An Economic Overview Of Ethanol Co-Product Utilization In Nebraska, Josie Waterbury, Darrell R. Mark, Sarah Thoms, Galen E. Erickson, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
To better understand co-product utilization, inclusion rates, pricing and storage strategies, Nebraska cattle producers were surveyed regarding their co-product feeding and pricing practices. Although nearly 91% of cattle on feed in Nebraska were being fed ethanol co-products in 2007, many types of co-products were being utilized from both ethanol plants in Nebraska and surrounding states. As illustrated by the price data collected, especially those for wet distillers grains plus solubles, opportunities existed for pricing and storage strategies, although more price variation was present in the data collected from the survey as compared to the prices reported by the Agricultural Marketing …
Sulfur In Distillers Grains, Sarah Vanness, Terry J. Klopfenstein, Galen E. Erickson, Kip Karges
Sulfur In Distillers Grains, Sarah Vanness, Terry J. Klopfenstein, Galen E. Erickson, Kip Karges
Nebraska Beef Cattle Reports
Data were compiled from 4,143 cattle on byproduct feeding experiments. Incidence of polioencephalomalacia was small (0.14%) in diets containing 0.46% or less sulfur (S). Incidences of polioencephalomalacia increased when cattle were fed diets above 0.46% S and especially above 0.56%. Phosphoric acid successfully replaced sulfuric acid in ethanol fermentation, but the amount and cost of phosphoric acid likely limit the economic feasibility of its use.
Hydrogen Sulfide Gas Levels Post Feeding, Sarah J. Vanness, Nathan Meyer, Terry J. Klopfenstein, Galen E. Erickson
Hydrogen Sulfide Gas Levels Post Feeding, Sarah J. Vanness, Nathan Meyer, Terry J. Klopfenstein, Galen E. Erickson
Nebraska Beef Cattle Reports
Dietary sulfur level is associated with hydrogen sulfide gas (H2S) levels in the rumen. These studies quantified H2S levels at different times post feeding with or without added iron (Fe) or copper (Cu) to bind sulfur. In addition, the correlations of ruminal pH measurements to ruminal H2S gas levels were estimated. Correlations between ruminal pH and hydrogen sulfide levels were not large and Fe and Cu did not affect H2S levels.
Ruminal Sulfide Levels In Corn Byproduct Diets With Varying Roughage Levels, Sarah Vanness, Nathan Meyer, Terry J. Klopfenstein, Galen E. Erickson
Ruminal Sulfide Levels In Corn Byproduct Diets With Varying Roughage Levels, Sarah Vanness, Nathan Meyer, Terry J. Klopfenstein, Galen E. Erickson
Nebraska Beef Cattle Reports
Ruminally fistulated steers with wireless pH probes were utilized to quantify ruminal pH plus hydrogen sulfide (H2S) levels produced at different times post feeding and to determine the effect of roughage level in high byproducts diets on hydrogen sulfide production. Because of variation in H2S levels, ruminal pH was not related to high H2S levels. When treatment means were used, pH and H2S levels were highly correlated. We observed lower H2S levels in diets with 7.5% or 15% grass hay compared with no roughage.
Thanks Ivan Rush
Nebraska Beef Cattle Reports
Dr. Ivan Rush, as you retire, those of us in the Department of Animal Science reflect on your remarkable career. We also wish to say, “Thanks!” Ivan, thanks for 35 years of making us look good. To many of Nebraska’s cattlemen, you are the person who comes to mind when UNL is mentioned. Fortunately for us, your reputation for knowledge is based both on soundly designed experiments and the wisdom of practical experience with cattle. You have earned the respect of cattlemen in Nebraska, in nearby states, and even overseas. Thanks for your contributions to the development of computer programs …
Moving Beyond Weight As The Only Predictor Of Breeding Readiness: Using A Breeding Maturity Index, Matthew Stockton, Roger K. Wilson, Richard N. Funston, Leslie Aaron Stalker, Dillon Feuz
Moving Beyond Weight As The Only Predictor Of Breeding Readiness: Using A Breeding Maturity Index, Matthew Stockton, Roger K. Wilson, Richard N. Funston, Leslie Aaron Stalker, Dillon Feuz
Nebraska Beef Cattle Reports
A maturity index (MI) was developed using data from Gudmundsen Sandhills Laboratory to predict a heifer’s optimal size for breeding. It was developed from observable information such as age, feeding regime, pre-breeding, birth and dam weights. The MI was the most precise predictor of actual percentage of mature weight versus using estimates developed from the herd’s estimated average weight or the dam’s mature weight. The MI also was a more accurate predictor of first pregnancy than the typically applied measure.
The Effects Of Breeding Maturity On Dystocia And Rebreeding Of The Primiparous Beef Female, Matthew Stockton, Roger K. Wilson, Richard N. Funston
The Effects Of Breeding Maturity On Dystocia And Rebreeding Of The Primiparous Beef Female, Matthew Stockton, Roger K. Wilson, Richard N. Funston
Nebraska Beef Cattle Reports
Maturity Index (MI) was used in a Probit regression as an explanatory variable of dystocia, where dystocia was used in a Probit regression as an explanatory variable of rebreeding rates of primiparous cows from data collected on replacement heifers from the Gudmundsen Sandhills Laboratory. Dystocia was found to decrease from about 40% to 13% for heifers when the MI increased from 53 to 70, supporting the notion that maturity reduces the incidence of dystocia, resulting in an increase in the second pregnancy rate.
Statistics Used In The Nebraska Beef Report And Their Purpose
Statistics Used In The Nebraska Beef Report And Their Purpose
Nebraska Beef Cattle Reports
The purpose of beef cattle and beef product research at UNL 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 or she must sample the population. The 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 a more detailed …