Amanda Holder
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View article: PSV-10 Evaluation of the effect of probiotic feed additives in the diet to improve dairy production and quality measures
PSV-10 Evaluation of the effect of probiotic feed additives in the diet to improve dairy production and quality measures Open
There is limited information regarding the effectiveness of probiotic feed additives in the diet of lactating dairy cows. This study aimed to determine the effect that Fastrack probiotic had on the yield and milk quality measures of lactat…
View article: PSIV-A-13 The relationship between breed-wide expected progeny differences, genomic predictors, and phenotypic values in mature Angus cows
PSIV-A-13 The relationship between breed-wide expected progeny differences, genomic predictors, and phenotypic values in mature Angus cows Open
For many years, selection for improved beef production centered on heavier weaning weights and more rapid post-weaning gain. More recently, measurement of post-weaning feed intake has facilitated direct improvement in feed efficiency in th…
View article: PSVI-20 The effect of a probiotic feed additive on average daily gain and feed intake
PSVI-20 The effect of a probiotic feed additive on average daily gain and feed intake Open
Probiotic feed additive use in the swine industry has become increasingly popular as a substitute for antibiotic feed additives. This is due to the overuse of antibiotics in swine diets that has led to antibiotic residues in animal product…
View article: PSV-1 A comparison of Holstein-cross cattle and beef-cross cattle in terms of performance and carcass quality
PSV-1 A comparison of Holstein-cross cattle and beef-cross cattle in terms of performance and carcass quality Open
Crossbreeding Holstein cows to beef sires has increased in popularity as a means to increase marketability of the dairy offspring. A large portion of these dairy-cross animals are offspring of Holstein cows and Angus bulls. The objective o…
View article: PSV-6 The additive effect of hormonal implant and inclusion of beta-agonists in carcass quality in beef cattle
PSV-6 The additive effect of hormonal implant and inclusion of beta-agonists in carcass quality in beef cattle Open
The objective of this study was to determine what additive effect hormonal implants and inclusion of beta-agonists in the diet have on carcass quality in yearling beef steers. Twenty-one Hereford-cross steers (450 ± 15 kg) were assigned to…
View article: PSII-2 Effect of piglet processing and castration on growth performance in feeder pigs
PSII-2 Effect of piglet processing and castration on growth performance in feeder pigs Open
Early in life castration in swine is a common practice to improve muscle and fat deposition and avoid “boar taint”, which is caused by production of androsterone and skatole within the intact male. The objective of this study was to evalua…
View article: PSV-13 The influence of diet type on beef cattle performance and meat quality characteristics
PSV-13 The influence of diet type on beef cattle performance and meat quality characteristics Open
The objective of this study was to determine what additive effect hormonal implants and inclusion of beta-agonists in the diet have on carcass quality in yearling beef steers. Hereford-cross steers [n = 21; initial body weight (BW) = 450 ±…
View article: PSVI-2 Economic evaluation of forage-fed vs concentrate-fed beef finishing systems
PSVI-2 Economic evaluation of forage-fed vs concentrate-fed beef finishing systems Open
The objective of this study was to determine the economic benefit of implanting beef steers and including a beta-agonist in the finishing diet. To accomplish this, Hereford-cross steers (450 ± 15 kg) were assigned to one of three drylot pe…
View article: Predicting feed intake in confined beef cows
Predicting feed intake in confined beef cows Open
Six existing equations (three for nonlactating and three for lactating; NRC, 1987, Predicting feed intake of food-producing animals. Washington, DC: The National Academies Press, National Academy of Science; doi: 10.17226/950; NRC, 1996, N…
View article: PSVI-2 Economic Evaluation of Forage-Fed vs Concentrate-Fed Beef Finishing Systems
PSVI-2 Economic Evaluation of Forage-Fed vs Concentrate-Fed Beef Finishing Systems Open
The objective of this study was to determine the price points at which it is more economical to finish beef animals on forage-based or concentrate-based diets. To accomplish this, Hereford steers (n = 21; BW = 444 ± 10 kg) were fed out on …
View article: PSI-A-8 The Effect of Rumen Capacity Manipulation on Dry Matter Intake on Diets Differing for Processing Level
PSI-A-8 The Effect of Rumen Capacity Manipulation on Dry Matter Intake on Diets Differing for Processing Level Open
Rumen fill is a driving force behind intake in ruminant animals consuming unprocessed forage. The objective of this study was to determine the effect of rumen available capacity on feed intake of diets processed to different levels. To eva…
View article: PSVI-4 The Influence of Diet Type on Beef Cattle Performance and Meat Quality Characteristics
PSVI-4 The Influence of Diet Type on Beef Cattle Performance and Meat Quality Characteristics Open
The objective of this study was to determine the effect of diet type on feed intake in yearling steers. Hereford steers (n = 21; BW = 444 ± 10 kg) were assigned to one of three drylot pens based on initial BW. Each drylot pen was assigned …
View article: PSV-12 Effects of Diet on Feed Intake, Weight Change, and Gas Emissions in Beef Cows
PSV-12 Effects of Diet on Feed Intake, Weight Change, and Gas Emissions in Beef Cows Open
The objective of this study was to examine the effects of diet energy density on ranking for dry matter intake (DMI), residual feed intake (RFI), and greenhouse gas emissions. Forty-two mature, gestating Angus cows [600 ± 69 kg body weight…
View article: PSVII-1 Effect of the Sequence of Feeding Forage and Concentrate-Based Diets on dry Matter Intake and Average Daily Gain of Growing Angus Bulls
PSVII-1 Effect of the Sequence of Feeding Forage and Concentrate-Based Diets on dry Matter Intake and Average Daily Gain of Growing Angus Bulls Open
The objective of this experiment was to determine the effects of diet type and sequence on average daily gain (ADG) and feed intake (DMI) in Angus bulls. Diets were concentrate (CONC; 58% dry-rolled corn, 18% Sweet Bran, 9% prairie hay, 5%…
View article: Effects of diet on feed intake, weight change, and gas emissions in beef cows
Effects of diet on feed intake, weight change, and gas emissions in beef cows Open
The objective of this study was to examine the effects of diet energy density on ranking for dry matter intake (DMI), residual feed intake (RFI), and greenhouse gas emissions. Forty-two mature, gestating Angus cows (600 ± 69 kg body weight…
View article: Retained energy in lactating beef cows; effects on maintenance energy requirement and voluntary feed intake
Retained energy in lactating beef cows; effects on maintenance energy requirement and voluntary feed intake Open
The objectives of these experiments were to determine the relationship between maintenance requirements and energy partitioned to maternal tissue or milk production in limit-fed Angus cows and to determine the relationship between retained…
View article: 132 Ranking Beef Heifers for Residual Intake Using an Unprocessed Grass Hay Diet and Its Relationship to Greenhouse Gasses
132 Ranking Beef Heifers for Residual Intake Using an Unprocessed Grass Hay Diet and Its Relationship to Greenhouse Gasses Open
The objective of this study was to rank beef heifers for residual feed intake and greenhouse gas emissions using an unprocessed, grass hay diet. Fifty yearling Angus heifers were monitored for 62 days using the SmartFeed individual intake …
View article: 133 Ranking Mature Beef Cows for Residual Intake Using an Unprocessed Grass Hay Diet and Its Relationship to Greenhouse Gas Exchange
133 Ranking Mature Beef Cows for Residual Intake Using an Unprocessed Grass Hay Diet and Its Relationship to Greenhouse Gas Exchange Open
The objective of this study was to compare high and low residual feed intake (RFI) beef cows when consuming an unprocessed, grass hay diet (93% DM, 8.73% CP, 2.11 Mcal ME, and 59.25% TDN). Relationships of hay intake to carbon dioxide (CO2…
View article: Predicting Fusarium Head Blight Resistance for Advanced Trials in a Soft Red Winter Wheat Breeding Program With Genomic Selection
Predicting Fusarium Head Blight Resistance for Advanced Trials in a Soft Red Winter Wheat Breeding Program With Genomic Selection Open
Many studies have evaluated the effectiveness of genomic selection (GS) using cross-validation within training populations; however, few have looked at its performance for forward prediction within a breeding program. The objectives for th…
View article: 340 Relationship of Retained Energy in Lactating Beef Cows to Maintenance Energy Requirement and voluntary Feed Intake
340 Relationship of Retained Energy in Lactating Beef Cows to Maintenance Energy Requirement and voluntary Feed Intake Open
This study’s objective was to determine the relationship between retained energy, lactation maintenance energy requirement (MER), and dry period voluntary feed intake (VOL) in beef cows. Twenty-four mature fall-calving Angus cows were used…
View article: Water and forage intake, diet digestibility, and blood parameters of beef cows and heifers consuming water with varying concentrations of total dissolved salts
Water and forage intake, diet digestibility, and blood parameters of beef cows and heifers consuming water with varying concentrations of total dissolved salts Open
The objective of this study was to investigate the effects of water quality on water intake (WI), forage intake, diet digestibility, and blood constituents in beef cows and growing beef heifers. This was a replicated 5 × 5 Latin square wit…
View article: The Influence of Diet Type on Ranking for Feed Intake in Angus Cows
The Influence of Diet Type on Ranking for Feed Intake in Angus Cows Open
The objective of this study was to determine the effect of diet type on feed intake in mature Angus cows. Forty-eight gestating Angus cows (708 ± 52 kg; 7 ± 0.75 years old) were assigned to one of four drylot pens based on their genomic sc…
View article: Relationship Between Gas Emissions and Dry Matter Intake in Mature Angus Cows
Relationship Between Gas Emissions and Dry Matter Intake in Mature Angus Cows Open
The objective of this study was to examine the effects of diet quality on greenhouse gas emissions and dry matter intake (DMI). We used 42 mature, gestating Angus cows (600±69 kg; and BSC 5.3±1.1) with a wide range in DMI EPD (-1.36 to 2.2…
View article: 127 Predicting Dry Matter Intake of Gestating and Lactating Beef Cows
127 Predicting Dry Matter Intake of Gestating and Lactating Beef Cows Open
In 1996, the NASEM beef cattle committee developed and published an equation to estimate cow feed intake using results from studies conducted or published between 1979 and 1993 (Nutrient Requirements of Beef Cattle). The same equation was …
View article: 188 Voluntary individual intake and performance of mature cows compared to primiparous heifers consuming a low quality forage
188 Voluntary individual intake and performance of mature cows compared to primiparous heifers consuming a low quality forage Open
This study investigated production and efficiency of Angus first-calf heifers and mature cows. During late lactation (January through April), cow/calf pairs were provided abundant bermudagrass hay and 2.5 kg of dried distiller’s grains wit…
View article: 29 The effect of fleshing ability on cow and calf performance
29 The effect of fleshing ability on cow and calf performance Open
Several factors influence the overall maintenance requirements of a mature beef cow including age, gain, lactation, pregnancy, and fleshing ability. However, limited research is available to distinguish what sets a hard-fleshing cow apart …
View article: 177 The effect of breeding system on voluntary forage consumption of beef cows
177 The effect of breeding system on voluntary forage consumption of beef cows Open
Recent genetic trends in beef breeds suggest an imbalance in the selection of output and input traits. The inverse relationship between cow maintenance requirements with output traits such as growth and milk production may have ramificatio…
View article: 178 The Effect of Fleshing Ability on Cow and Calf Performance
178 The Effect of Fleshing Ability on Cow and Calf Performance Open
Several factors influence the overall maintenance requirements of a mature beef cow including age, gain, lactation, pregnancy, and fleshing ability. However, limited research is available to distinguish what sets a hard-fleshing cow apart …
View article: 1 The effect of breeding system on voluntary forage consumption of beef cows
1 The effect of breeding system on voluntary forage consumption of beef cows Open
Recent genetic trends in beef breeds suggest an imbalance in the selection of output and input traits. The inverse relationship between cow maintenance requirements with output traits such as growth and milk production may have ramificatio…
View article: Application of the California Net Energy System to grazed forage: feed values and requirements
Application of the California Net Energy System to grazed forage: feed values and requirements Open
The California Net Energy System (CNES) has been successfully used for many years to generate estimates of grazing animal energy requirements, supplemental needs, and energy value of grazed forage diets. Compared to pen feeding situations,…