Greg B Penner
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View article: 224 Effects of Feeding Hybrid Rye Grain as a Replacement for Barley Grain on Feed Intake, Ruminal Fermentation, and Site of Nutrient Digestion for Finishing Beef Cattle
224 Effects of Feeding Hybrid Rye Grain as a Replacement for Barley Grain on Feed Intake, Ruminal Fermentation, and Site of Nutrient Digestion for Finishing Beef Cattle Open
The objective of this study was to evaluate effects of increasing hybrid rye as a replacement for barley grain on feed intake, ruminal fermentation, and site of nutrient digestion in finishing cattle. Eight ruminally and duodenally cannula…
View article: 211 Evaluation of Beef Heifer Variability in the Ability to Eat and Digest a High Forage Diet
211 Evaluation of Beef Heifer Variability in the Ability to Eat and Digest a High Forage Diet Open
This study evaluated beef heifers selected for high or low digestible fiber intake (DFI) and investigated its relationship with methane production, residual feed intake (RFI), and total tract digestibility. Sixteen recently weaned black An…
View article: PSVIII-A-2 How Does the Duration of Low Feed Intake Affect the Ruminant Gastrointestinal tract?
PSVIII-A-2 How Does the Duration of Low Feed Intake Affect the Ruminant Gastrointestinal tract? Open
The objective of this study was to determine the effect of 5 and 10 d low feed intake (LF) on the ruminant gastrointestinal tract (GIT). Twelve rams and nine wethers were used in a randomized complete block design where they were blocked b…
View article: PSXII-30 Changes in Ruminal Digesta and Ruminal Ammonia-N Concentration with Differing Durations Feed Restriction for Sheep
PSXII-30 Changes in Ruminal Digesta and Ruminal Ammonia-N Concentration with Differing Durations Feed Restriction for Sheep Open
During transient periods of feed restriction (FR), ruminal ammonia-N (NH3-N) concentrations and fluid volume may parallel the reduction in feed and water intake. However, changes in ruminal digesta characteristics and NH3-N during FR have …
View article: PSVIII-A-6 Effects of Feeding Ground Whole Flaxseed, Defatted Flaxseed Meal and Organic Flaxseed Meal on Production Performance, Rumen Fermentation, and Total-Tract Nutrient Digestibility in Dairy Cows
PSVIII-A-6 Effects of Feeding Ground Whole Flaxseed, Defatted Flaxseed Meal and Organic Flaxseed Meal on Production Performance, Rumen Fermentation, and Total-Tract Nutrient Digestibility in Dairy Cows Open
This study aimed to determine the effects of feeding ground whole flaxseed and two types of mechanically extracted flaxseed meals on dry matter intake (DMI), milk production and composition, ruminal fermentation characteristics, and total-…
View article: PSIX-18 A Meta-Analysis on Undigestible Neutral Detergent Fiber as a Predictor for Feedlot Cattle Performance and Carcass Characteristics
PSIX-18 A Meta-Analysis on Undigestible Neutral Detergent Fiber as a Predictor for Feedlot Cattle Performance and Carcass Characteristics Open
Undigestible neutral detergent fiber (uNDF) is a non-nutritive component of the diet representing the portion of neutral detergent fiber (NDF) that is not digested. The uNDF amount affects ruminal fill, passage rate, diet digestibility, an…
View article: 223 Impacts of Active Dry Yeast (<i>Saccharomyces cerevisiae</i>) on Gut Permeability in Finishing Beef Cattle
223 Impacts of Active Dry Yeast (<i>Saccharomyces cerevisiae</i>) on Gut Permeability in Finishing Beef Cattle Open
The objectives of this study were to examine the impacts of active live yeast (Saccharomyces cerevisiae) as a dietary feed additive on dry matter intake, feed sorting, gut permeability, ruminal pH and volatile fatty acids (VFA) concentrati…
View article: 212 Genome-Wide Association Study Investigating the Genomic Components of Efficiency in Beef Cows
212 Genome-Wide Association Study Investigating the Genomic Components of Efficiency in Beef Cows Open
Efficiency of mature beef cows consuming high-forage diets is not comparable with standard definitions of beef cattle efficiency such as feed conversion or residual feed intake in the feedlot setting. This study aimed to conduct a genome-w…
View article: 207 Effect of Sodium Sulfate in Water and Dietary Bismuth Subsalicylate on Feed and Water Intake, Ruminal Hydrogen Sulfide Concentration, and Trace Mineral Status of Growing Beef Heifers
207 Effect of Sodium Sulfate in Water and Dietary Bismuth Subsalicylate on Feed and Water Intake, Ruminal Hydrogen Sulfide Concentration, and Trace Mineral Status of Growing Beef Heifers Open
Cattle consuming increased concentrations of sulfur (S) are at an increased risk for depletion of copper (Cu) and or S-induced polioencephalomalacia and there are limited mitigation strategies to alleviate risk for cattle consuming high su…
View article: PSVIII-A-1 Effect of Source of Trace Mineral and Bismuth Subsalicylate on Growth, Ruminal H2s, and Trace Mineral Status of Growing Heifers
PSVIII-A-1 Effect of Source of Trace Mineral and Bismuth Subsalicylate on Growth, Ruminal H2s, and Trace Mineral Status of Growing Heifers Open
This study evaluated the effects of providing inorganic, chelated, and inorganic plus injectable trace mineral supplementation strategies with or without the inclusion of bismuth subsalicylate (BSS) on dry matter intake (DMI), water intake…
View article: PSXII-19 Effects of Feeding Hybrid Rye Grain as a Replacement for Barley Grain on Feed Intake, Growth Performance and Carcass Characteristics of Finishing Beef Cattle
PSXII-19 Effects of Feeding Hybrid Rye Grain as a Replacement for Barley Grain on Feed Intake, Growth Performance and Carcass Characteristics of Finishing Beef Cattle Open
The objective of this study was to evaluate effects of increasing hybrid rye as a replacement for barley grain on feed intake, growth performance, and carcass characteristics for growing and finishing cattle. Commercial steers (n = 360) wi…
View article: 89 Evaluating the effect of Ca-gluconate and Ca-butyrate on SCFA absorption and permeability of the gastrointestinal tract
89 Evaluating the effect of Ca-gluconate and Ca-butyrate on SCFA absorption and permeability of the gastrointestinal tract Open
The objective was to evaluate short-chain fatty acid (SCFA) absorption and permeability of the gastrointestinal tract (GIT) of heifers infused either with Ca-gluconate or Ca-butyrate. Thirty-two ruminally cannulated beef heifers were fed a…
View article: 86 Evaluation of ensiled triticale varieties (‘Taza’ and ‘Bunker’ Triticosecale) and barley (Hordeum vulgare) on performance of backgrounding beef steers
86 Evaluation of ensiled triticale varieties (‘Taza’ and ‘Bunker’ Triticosecale) and barley (Hordeum vulgare) on performance of backgrounding beef steers Open
A 3-year study compared two triticale (Triticosecale) varieties, Bunker and Taza, with a conventional barley (Hordeum vulgare) fed as silage to backgrounding beef steers on the basis of crop dry matter (DM) yield, nutritive value, steer pe…
View article: 173 Characterization of urea transport mechanisms in the intestinal tract of growing pigs
173 Characterization of urea transport mechanisms in the intestinal tract of growing pigs Open
Previous studies have indicated that pigs are capable of nitrogen salvage via urea recycling, which involves the movement of urea into the gastrointestinal tract and incorporation of nitrogen into endogenous or microbially produced amino a…
View article: 84 Effect of incorporating forage pea (c.v. Pisium sativum L.) into cereal hay on ruminal fermentation and apparent digestibility when fed to beef heifers
84 Effect of incorporating forage pea (c.v. Pisium sativum L.) into cereal hay on ruminal fermentation and apparent digestibility when fed to beef heifers Open
The objective was to evaluate the effect of inclusion rate of pea hay in barley and oat hay when fed to beef cattle. Six ruminally-cannulated heifers (407 ± 38 kg) were used in a 6 × 6 Latin square with a 2 × 3 factorial design and 25-d pe…
View article: 393 Beef cow antepartum glucose-insulin kinetics are altered by overfeeding metabolizable protein during late gestation and influenced by test-day relative to calving
393 Beef cow antepartum glucose-insulin kinetics are altered by overfeeding metabolizable protein during late gestation and influenced by test-day relative to calving Open
The objective of this study was to determine whether antepartum glucose-insulin kinetics were affected when primiparous Hereford-cross heifers were fed diets containing 100 (CON; n = 10) or 133% (HMP; n = 11) of their metabolizable protein…
View article: Predictability of growth performance in feedlot cattle using fecal near infrared spectroscopy
Predictability of growth performance in feedlot cattle using fecal near infrared spectroscopy Open
Near infrared spectroscopy (NIRS) was used to predict nutrients and apparent total tract digestibility (aTTD) of nutrients and gross energy (GE) using 282 pooled pen-floor dried ground fecal samples collected monthly over 13-mo from 6 feed…
View article: Ruminal pH, short-chain fatty acid concentrations, and serum acute phase protein concentrations during finishing for steers with and without rumen and liver pathology
Ruminal pH, short-chain fatty acid concentrations, and serum acute phase protein concentrations during finishing for steers with and without rumen and liver pathology Open
This study was carried out to determine whether ruminal fermentation and serum acute phase protein concentrations differed between steers with and without pathology at slaughter. Ruminally cannulated steers (n = 28) were housed with noncan…
View article: Digestibility and growth performance of feedlot cattle fed pelleted grain screenings
Digestibility and growth performance of feedlot cattle fed pelleted grain screenings Open
The impact of two different grain screening pellets (GSP) on the chemical profile of feces, feed digestibility, growth performance and carcass traits of feedlot heifers was measured. Near infrared spectroscopy (NIRS) was used to predict di…
View article: Development and physiology of the rumen and the lower gut: Targets for improving gut health
Development and physiology of the rumen and the lower gut: Targets for improving gut health Open
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