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Articles 1111 - 1126 of 1126
Full-Text Articles in Life Sciences
Delaying Implant In High-Risk Calves Has No Benefit For Health Or Feedlot Performance (2012), R.D. Munson, Daniel U. Thomson, Christopher D. Reinhardt
Delaying Implant In High-Risk Calves Has No Benefit For Health Or Feedlot Performance (2012), R.D. Munson, Daniel U. Thomson, Christopher D. Reinhardt
Kansas Agricultural Experiment Station Research Reports
Bovine respiratory disease is the most common and costly disease in the beef industry. Calves affected by bovine respiratory disease have a 53-lb decrease in finished weights and decreased quality grades compared with healthy cattle. Many stressors influence post-arrival health and nutrient intake, including weaning, marketing, transportation, co-mingling, genetics, previous nutrition, and health history. These stressors can negatively affect the immune system at a time when the animal is more likely to be exposed to infectious agents within the bovine respiratory disease complex. Feed intake by stressed calves is low, and low nutrient intake likely increases the negative effects of …
Comparison Of The Effects Of Three Different Dehorning Techniques On Behavior And Performance In Feeder Cattle In A Western Kansas Feedlot (2012), C.D. Neely, C.A. Kerr, David E. Anderson, Daniel U. Thomson, Christopher D. Reinhardt
Comparison Of The Effects Of Three Different Dehorning Techniques On Behavior And Performance In Feeder Cattle In A Western Kansas Feedlot (2012), C.D. Neely, C.A. Kerr, David E. Anderson, Daniel U. Thomson, Christopher D. Reinhardt
Kansas Agricultural Experiment Station Research Reports
Removing the horns of cattle when they arrive at feeding facilities is a common practice to reduce injury to other cattle. Bruising on carcasses of cattle that have been housed in pens containing horned cattle increases noticeably. Horned feeder cattle marketed in Arkansas regional livestock auction barns received average discounts of $3.23/cwt in 2005, giving producers the incentive to dehorn their cattle before marketing. Three common techniques (tipping, dehorning, and banding) are utilized in the field to remove or reduce horn length in beef cattle. Tipping is the practice of removing the tip of the horn such that the diameter …
Effect Of Transportation On E. Coli O157:H7 Prevalence And Coliform Concentrations In Feces Of Feedlot Cattle (2012), C. Aperce, James S. Drouillard
Effect Of Transportation On E. Coli O157:H7 Prevalence And Coliform Concentrations In Feces Of Feedlot Cattle (2012), C. Aperce, James S. Drouillard
Kansas Agricultural Experiment Station Research Reports
Foodborne illness from Escherichia coli O157:H7 is a major concern for the food industry. Contamination of food products can occur at slaughter by contact with hide or feces. Limiting E. coli O157:H7 shedding is important to prevent outbreaks. Previous studies have demonstrated a relationship between stress and levels of pathogens shed in feces. During transport to the slaughterhouse, animals are subjected to large amounts of stress. This stress could increase shedding of E. coli O157:H7 prior to slaughter, and in so doing increase the risk of contamination of beef products by contact with hides or feces. Our objective in this …
Presynchronizing Prostaglandin F2Α Injection Before Timed Artificial Insemination Co-Synch + Cidr Program (2012), Scott L. Hill, Stephanie Leeann Pulley, H.I. Jr. Mellieon, K. C. Olson, John R. Jaeger, Ryan M. Breiner, G.A. Perry, G.C. Lamb, Jeffrey S. Stevenson
Presynchronizing Prostaglandin F2Α Injection Before Timed Artificial Insemination Co-Synch + Cidr Program (2012), Scott L. Hill, Stephanie Leeann Pulley, H.I. Jr. Mellieon, K. C. Olson, John R. Jaeger, Ryan M. Breiner, G.A. Perry, G.C. Lamb, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Fixed-time artificial insemination is an effective management tool that reduces the labor associated with more conventional programs that require detection of estrus. The 7-day CO-Synch + controlled internal drug release (CIDR) insert protocol has been shown to effectively initiate estrus and ovulation in cycling and non-cycling suckled beef cows, producing pregnancy rates at or greater than 50% in beef cows. The gonadotropin- releasing hormone (GnRH) injection that begins the CO-Synch + CIDR program initiates ovulation in a large proportion of cows, particularly anestrous cows. The CIDR, which releases progesterone intravaginally, prevents short estrous cycles that usually follow the first postpartum …
Mga And Growth Promotants Administered To Beef Feedlot Heifers Have No Effect On Subsequent Oocyte Quality Or In Vitro Embryo Production (2012), N. Miller, David M. Grieger, Karol E. Fike
Mga And Growth Promotants Administered To Beef Feedlot Heifers Have No Effect On Subsequent Oocyte Quality Or In Vitro Embryo Production (2012), N. Miller, David M. Grieger, Karol E. Fike
Kansas Agricultural Experiment Station Research Reports
Beef feedlot heifers have the potential to serve as viable donors of oocytes post-slaughter for in vitro embryo production. Oocyte quality is a critical factor affecting the success of in vitro embryo production and can be influenced by factors such as age and reproductive status, ovarian follicle size, and nutritional status of the donor female. In a conventional feedlot setting, heifers are typically administered steroid-based growth promotants and fed melengestrol acetate (MGA) for suppression of estrus, which increases circulating concentrations of reproductive steroids, particularly estradiol. The effects of these management practices on oocyte quality and numbers are unknown. The purpose …
Increasing Protein Supply To Pregnant Beef Cows When Energy Is Limited Does Not Improve Cow Or Calf Performance (2012), E.A. Bailey, Evan C. Titgemeyer, R.C. Cochran, Timothy J. Jones, K. C. Olson
Increasing Protein Supply To Pregnant Beef Cows When Energy Is Limited Does Not Improve Cow Or Calf Performance (2012), E.A. Bailey, Evan C. Titgemeyer, R.C. Cochran, Timothy J. Jones, K. C. Olson
Kansas Agricultural Experiment Station Research Reports
Pre- and postpartum deficiencies of metabolizable protein have been identified as potentially limiting to productivity of beef cows and calves. Pre-partum supplementation of forage-based diets with ruminally undegraded protein has increased weight gain and breeding performance in prior studies, but the level of ruminally degraded protein fed was not known. Feeding adequate ruminally degraded protein to beef cows maximizes the productivity of microbes in the rumen, so any benefits shown in prior work could have been attributed to increased ruminal fermentation. Our objectives were (1) to determine the value of supplementing ruminally undegraded protein when dietary ruminally degraded protein supply …
Effects Of Prepartum And Postpartum Bolus Injections Of Trace Minerals On Performance Of Beef Cows And Calves Grazing Native Range (2012), L.R. Mundell, Jeffrey S. Stevenson, David M. Grieger, L.A. Pacheco, J.W. Bolte, N.A. Aubel, G.J. Eckerle, M.J. Macek, L.J. Havenga, K. C. Olson
Effects Of Prepartum And Postpartum Bolus Injections Of Trace Minerals On Performance Of Beef Cows And Calves Grazing Native Range (2012), L.R. Mundell, Jeffrey S. Stevenson, David M. Grieger, L.A. Pacheco, J.W. Bolte, N.A. Aubel, G.J. Eckerle, M.J. Macek, L.J. Havenga, K. C. Olson
Kansas Agricultural Experiment Station Research Reports
Adequate dietary intakes of trace minerals are thought necessary to maximize cow reproduction, calf health, and calf performance. Diets grazed by beef cattle are generally deficient to marginal in copper (Cu), manganese (Mn), selenium (Se), and zinc (Zn) concentrations; therefore, these trace minerals are usually added to the diet in supplement form. The most widely used means of trace-mineral supplementation for grazing cattle is selffed, salt-based, loose mineral supplements. Although cattle do not balance their mineral needs when consuming a self-fed mineral supplement, usually no other practical way of supplying mineral needs exists under grazing conditions. The greatest limitation to …
Effects Of Corn Steep Liquor Supplementation On Voluntary Selection Of Tallgrass Prairie Hay Contaminated With Sericea Lespedeza And Uncontaminated Tallgrass Prairie Hay (2012), G.J. Eckerle, L.A. Pacheco, K. C. Olson, John R. Jaeger
Effects Of Corn Steep Liquor Supplementation On Voluntary Selection Of Tallgrass Prairie Hay Contaminated With Sericea Lespedeza And Uncontaminated Tallgrass Prairie Hay (2012), G.J. Eckerle, L.A. Pacheco, K. C. Olson, John R. Jaeger
Kansas Agricultural Experiment Station Research Reports
Sericea lespedeza (Lespedeza cuneata) is classified as a noxious weed throughout the Great Plains. It produces copious amounts of seed annually and contains high levels of condensed tannins during much of the growing season, which deters grazing by large domestic herbivores. In Kansas alone, this plant infests approximately 600,000 acres of native range, reducing native grass production by up to 92%. Increased grazing pressure on sericea lespedeza by beef cattle may slow its spread and facilitate some measure of biological control. Feedstuffs or feed additives with tannin-binding properties may promote voluntary consumption of this plant by grazing beef cattle. In …
Zilmax Alters Blood Constituents Of Finishing Cattle (2012), C.L. Van Bibber, James S. Drouillard
Zilmax Alters Blood Constituents Of Finishing Cattle (2012), C.L. Van Bibber, James S. Drouillard
Kansas Agricultural Experiment Station Research Reports
The purpose of this experiment was to determine the effects of Zilmax (Merck Animal Health, Summit, NJ) on changes in blood metabolites. Zilmax is a feed additive designed to improve production efficiency in cattle when fed during the last phase at the feedlot. Zilmax works by redirecting the energy use in the body to form more lean muscle at the expense of fat deposition. The blood metabolites measured in our experiment were glucose and lactate, which are the energy sources for various body functions including muscle growth. Plasma urea nitrogen was measured as an indicator of protein catabolism. Non-esterified fatty …
Accelerated Step-Up Regimes For Feedlot Heifers Following Oral Dosing With Lactipro (Megasphaera Elsdenii Strain Ncimb 41125) (2012), K. Miller, C.L. Van Bibber, James S. Drouillard
Accelerated Step-Up Regimes For Feedlot Heifers Following Oral Dosing With Lactipro (Megasphaera Elsdenii Strain Ncimb 41125) (2012), K. Miller, C.L. Van Bibber, James S. Drouillard
Kansas Agricultural Experiment Station Research Reports
Cattle entering feedlots typically are adapted to finishing diets over a period of 2 to 4 weeks by gradually replacing forages with concentrate feeds using a series of step-up diets. Without proper adaptation, naïve cattle are highly susceptible to ruminal acidosis, a disorder associated with excessive production and accumulation of organic acids within the rumen. One of the key metabolic intermediates associated with the manifestation of acidosis is lactic acid, which is derived from fermentation of readily available starches and sugars. Streptococcus bovis is a prolific, rapidly growing, and opportunistic organism that thrives in the presence of readily fermented starches …
Influence Of Linpro And Dietary Copper On Feedlot Cattle Performance, Carcass Characteristics, And Fatty Acid Composition Of Beef (2012), C.A. Alvarado, C.C. Aperce, K.A. Miller, C.L. Van Bibber, S. Uwituze, James J. Higgins, James S. Drouillard
Influence Of Linpro And Dietary Copper On Feedlot Cattle Performance, Carcass Characteristics, And Fatty Acid Composition Of Beef (2012), C.A. Alvarado, C.C. Aperce, K.A. Miller, C.L. Van Bibber, S. Uwituze, James J. Higgins, James S. Drouillard
Kansas Agricultural Experiment Station Research Reports
Human diets often contain high levels of saturated fatty acids that can have deleterious health consequences such as obesity, diabetes, and heart disease. In contrast, omega-3 fatty acids, which are essential for human nutrition, are consumed at relatively low levels despite of their positive effects on health. Natural sources of omega-3 fatty acids include fresh legumes, cool-season grasses, flaxseed, and fish oil. In spite of the fact that fresh forages often are a key part of the cattle diet, beef is a relatively poor source of omega-3 fatty acids because of biohydrogenation, the action of microorganisms in the rumen that …
A Commercially Available Srp Vaccine Reduces Prevalence Of E. Coli O157:H7 In Feces Of Beef Cattle Under Commercial Feedlot Conditions (2012), B.A. Butler, G.H. Loneragan, Daniel U. Thomson, Tiruvoor G. Nagaraja, Christopher D. Reinhardt
A Commercially Available Srp Vaccine Reduces Prevalence Of E. Coli O157:H7 In Feces Of Beef Cattle Under Commercial Feedlot Conditions (2012), B.A. Butler, G.H. Loneragan, Daniel U. Thomson, Tiruvoor G. Nagaraja, Christopher D. Reinhardt
Kansas Agricultural Experiment Station Research Reports
Of all food safety challenges facing the beef industry, Escherichia coli O157:H7 has consistently presented the greatest economic remonstrance to meat packers and retailers. Cattle naturally shed E. coli O157:H7 in their feces, and it is a source of carcass contamination at harvest. If contaminated trim enters the food supply and is subsequently prepared incorrectly, it can lead to the human condition known as hemorrhagic colitis. In children or elderly people, an E. coli O157:H7 infection may lead to a more serious form known as hemolytic uremic syndrome, which is potentially lethal. Although the majority of previous research has been …
Effects Of Corn Steep Liquor Supplementation On Intake And Digestion Of Tallgrass Prairie Hay Contaminated With Sericea Lespedeza (2012), G.J. Eckerle, L.A. Pacheco, K. C. Olson, John R. Jaeger
Effects Of Corn Steep Liquor Supplementation On Intake And Digestion Of Tallgrass Prairie Hay Contaminated With Sericea Lespedeza (2012), G.J. Eckerle, L.A. Pacheco, K. C. Olson, John R. Jaeger
Kansas Agricultural Experiment Station Research Reports
Sericea lespedeza (Lespedeza cuneata) is a noxious weed that infests approximately 600,000 acres of native range in Kansas. Intake of sericea lespedeza by grazing beef cattle is poor due to the presence of condensed tannins in the plant. Condensed tannins reduce protein digestion by beef cattle and may also decrease plant palatability because of their astringent nature. Prolific seed production, in combination with little or no grazing pressure, has contributed to the rapid spread of sericea lespedeza in the Flint Hills. Increasing grazing pressure on sericea lespedeza may reduce seed production and slow its advance; however, the presence of condensed …
Aging Method, Usda Quality Grade, And Endpoint Temperature Affect Eating Quality Of Beef Longissimus Lumborum Steaks, E. Obuz, V. Gok, L. Akaya, Michael E. Dikeman
Aging Method, Usda Quality Grade, And Endpoint Temperature Affect Eating Quality Of Beef Longissimus Lumborum Steaks, E. Obuz, V. Gok, L. Akaya, Michael E. Dikeman
Kansas Agricultural Experiment Station Research Reports
Tenderness is one of the most important factors affecting consumers' perceptions and acceptance of palatability. Tenderness is affected by both myofibrillar proteins and connective tissue content and quality. Both marbling and carcass maturity can have a significant effect on beef palatability, with higher consumer sensory scores generally given to USDA Choice loin steaks than to Select steaks for tenderness, juiciness, and overall palatability. Endpoint temperature can also have a significant effect, with higher endpoint temperatures generally decreasing palatability. Aging beef is a common practice in the meat industry because it increases tenderness and flavor development. The meat industry generally utilizes …
Led Lighting Extends Color Shelf Life For Three Beef Products Compared With Fluorescent Lighting (2012), K.S. Steele, M.J. Weber, Elizabeth A.E. Boyle, A.S. Lobaton-Sulabo, C. Cundith, Y.H. Hiebert, K.A. Abrolat, J.M. Attey, S.D. Clark, D. Johnson
Led Lighting Extends Color Shelf Life For Three Beef Products Compared With Fluorescent Lighting (2012), K.S. Steele, M.J. Weber, Elizabeth A.E. Boyle, A.S. Lobaton-Sulabo, C. Cundith, Y.H. Hiebert, K.A. Abrolat, J.M. Attey, S.D. Clark, D. Johnson
Kansas Agricultural Experiment Station Research Reports
Consumers are not able to estimate tenderness, juiciness, or flavor when selecting beef cuts at retail stores. Instead, they rely on color as one of the major criteria to select beef cuts. During refrigerated display, fresh meat color changes and consumers discriminate against discolored meats. Meat items with discoloration must be discounted or discarded, leading to up to $1 billion in revenue loss nationally for the meat industry. Lighting type and intensity have a major impact on the appearance and shelf life of fresh beef in refrigerated retail display. Light emitting diode (LED) lighting offers advantages for display because it …
Steam-Generation Cooking Versus Dry Heat Convection Of Beef Roasts Differing In Connective Tissue (2012), L.J. Bowers, Michael E. Dikeman, Leigh W. Murray, Sally L. Stroda
Steam-Generation Cooking Versus Dry Heat Convection Of Beef Roasts Differing In Connective Tissue (2012), L.J. Bowers, Michael E. Dikeman, Leigh W. Murray, Sally L. Stroda
Kansas Agricultural Experiment Station Research Reports
Foodservice managers strive to control factors that affect yield, serving cost, and palatability of beef. Beef roasts are traditionally roasted at temperatures from 325°F to 350°F for both home and institutional use. Roasts relatively high in connective tissue cooked with moist heat generally are more tender than when cooked with dry heat. Roasts cooked to 150, 160, or 170°F could be expected to have cooking losses ranging from 20% to over 40%. The issue of cooking loss led Winston Industries to develop the CVap Cook and Hold Vapor Oven (Winston Industries, Louisville, KY). CVap technology controls evaporation by creating a …