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Glycolytic Inhibition In Pre-Rigor Muscle: An Alternative Method To Improve Beef Tenderness, Chris R. Calkins, Nancy Jerez, Jesus Velazco
Glycolytic Inhibition In Pre-Rigor Muscle: An Alternative Method To Improve Beef Tenderness, Chris R. Calkins, Nancy Jerez, Jesus Velazco
Nebraska Beef Cattle Reports
Flank muscle (FM) and loin eye muscle (LEM) were marinated with solutions of different glycolytic inhibitors to test their effect on tenderness, pH and color. The increase of pH was more evident in LEM than in FM. The improvement in tenderness was higher in FM. In LEM, the most desirable result (cherry-red color and more tender) was observed with sodium citrate. Flank muscle became more tender and had better color (cherry red) than the control with oxamic acid, iodoacetate, glucose and sodium acetate. Most of the compounds caused different responses between muscles. Potential inhibitors must be tested further to prove …
Progesterone Metabolism By The Liver And Brain During The Estrous Cycle Of Heifers, Jorge Quintal-Franco, Hector Jimenez-Severiano, Eraldo Zanella, Michael Wehrman, Brad Lindsey, Eric Melvin, Jim Kinder
Progesterone Metabolism By The Liver And Brain During The Estrous Cycle Of Heifers, Jorge Quintal-Franco, Hector Jimenez-Severiano, Eraldo Zanella, Michael Wehrman, Brad Lindsey, Eric Melvin, Jim Kinder
Nebraska Beef Cattle Reports
Heifers were used to evaluate progesterone metabolism in the liver and brain during the estrous cycle. Blood samples were collected from the carotid artery and jugular, portal and hepatic veins. Progesterone concentrations in the hepatic vein were less than in portal and jugular veins and the carotid artery, but there were no differences between the carotid artery and jugular and portal veins. Progesterone concentrations in the hepatic, portal and jugular veins represented 25, 89 and 86 percent of concentrations in the carotid artery, respectively. During the estrous cycle much of the progesterone in blood is metabolized by the liver.
Dietary Management For Starting Finishing Yearling Steers On Feed, Burt Weichenthal, Ivan G. Rush, Brad Van Pelt
Dietary Management For Starting Finishing Yearling Steers On Feed, Burt Weichenthal, Ivan G. Rush, Brad Van Pelt
Nebraska Beef Cattle Reports
Angus crossbred yearling steers were started on a finishing program with diets stepped-up in grain over 23 days or with limit-feeding of the final diet over three weeks. Limit-feeding during start-up improved overall feed efficiency, carcass dressing percentage and fat thickness, but did not affect daily gain or carcass quality and yield grades. In this small pen research trial, steers reached ad libitum intake of the final diet by limit-feeding of this diet during start-up without major problems from acidosis or related intake variation.
Pork Meat And Bone Meal Value Relative To Soybean Meal For Growing Calves, Casey Wilson, Galen E. Erickson, Ryan Mass, Terry J. Klopfenstein
Pork Meat And Bone Meal Value Relative To Soybean Meal For Growing Calves, Casey Wilson, Galen E. Erickson, Ryan Mass, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Individually fed steer calves (n=90) were used to evaluate different rendering procedures of pork meat and bone meal on protein quality as compared to soybean meal. Treatment proteins included an urea control, soybean meal, high-ash pork meat and bone meal, pork meat and bone meal control and non-enzymatically browned (NEB) pork meat and bone meal. High-ash meat and bone meal protein efficiency was higher than other treatments. However, the escape values determined by the ammonia release procedure were higher for NEB meat and bone meal, suggesting efficiency should have been improved relative to the control and high-ash meat and bone …
1999 Nebraska Beef Cattle Reports
1999 Nebraska Beef Cattle Reports
Nebraska Beef Cattle Reports
Acknowledgments
Cow/Calf: Effects of Time of Weaning on Cow and Calf Performance • Summer Grazing Date and Fall Grazing Intensity Effects on Protein Content and Digestibility of Fall Diets in the Nebraska Sandhills • Climate Affects Calf Birth Weights and Calving Difficulty • Trace Mineral Supplementation and Ovarian and Luteal Function in Pubertal Heifers • Progesterone Metabolism by the Liver and Brain During the Estrous Cycle of Heifers
Growing: Cysteine from Feather Meal and Sulfur Amino Acid Requirements for Growing Steers • Hog Hair Meal as a Protein Source for Ruminants • Pork Meat and Bone Meal Value Relative to …
Use Of Neutral Detergent Insoluble Protein In Omasal Samples To Estimate Escape Protein, Abdullah Can, Terry J. Klopfenstein, Ryan Mass
Use Of Neutral Detergent Insoluble Protein In Omasal Samples To Estimate Escape Protein, Abdullah Can, Terry J. Klopfenstein, Ryan Mass
Nebraska Beef Cattle Reports
Three experiments were conducted with ruminally cannulated steers to evaluate neutral detergent insoluble protein (NDIP) content of omasal samples as an escape protein estimation technique. In experiment 1, brome hay escape protein (EP) values were determined with the NDIP technique and the omasal sampling purine technique (OSPT) with no difference in EP values. In experiment 2, smooth bromegrass EP values were estimated in June and August, 1996. In situ and OSPT estimated similar EP values, but EP estimates from NDIP were lower. Experiment 3 was conducted from May through July, 1997. OSPT estimated the highest EP values. In experiments 2 …
Implant Strategies On Performance And Carcass Characteristics Of Finishing Steers, Rob Cooper, Todd Milton, Frank Prouty
Implant Strategies On Performance And Carcass Characteristics Of Finishing Steers, Rob Cooper, Todd Milton, Frank Prouty
Nebraska Beef Cattle Reports
A 145-day finishing trial was conducted to evaluate implant strategies on performance and carcass characteristics of yearling steers. Implanting steers with Synovex® C initially and then reimplanting with Synovex® Plus 75 days prior to slaughter improved feed efficiency compared to a single implant of Synovex® Plus or a reimplant program using Synovex® S. Carcass quality, as measured by the percentage USDA Choice carcasses and marbling scores, was unaffected by implant strategy. However, implanting steers with Synovex® PlusTM as a single implant or in a reimplant program increased profitability because feed efficiency and carcass weight were increased without decreasing carcass …
Corn And Sorghum Distillers Grains For Finishing Cattle, Ki Fanning, Todd Milton, Terry J. Klopfenstein, Mark Klemesrud
Corn And Sorghum Distillers Grains For Finishing Cattle, Ki Fanning, Todd Milton, Terry J. Klopfenstein, Mark Klemesrud
Nebraska Beef Cattle Reports
To evaluate corn and sorghum distillers grains in corn-based finishing diets, 60 crossbred, yearling steers were individually fed one of three finishing diets: dry-rolled corn, corn distillers grain or sorghum distillers grain for 127 days. Distillers grains were fed at 30 percent of the dietary dry matter, replacing dry-rolled corn. Distillers grains increased the final weight, daily gain, feed efficiency, hot carcass weight, fat thickness and yield grade compared with the control. Sorghum distillers grains increased dry matter intake and fat thickness compared with corn distillers grains.
Effects Of Rumensin Level And Bunk Management Strategy On Finishing Steers, Ki Fanning, Todd Milton, Terry J. Klopfenstein, D. J. Jordon, Rob Cooper, Cal Parrott
Effects Of Rumensin Level And Bunk Management Strategy On Finishing Steers, Ki Fanning, Todd Milton, Terry J. Klopfenstein, D. J. Jordon, Rob Cooper, Cal Parrott
Nebraska Beef Cattle Reports
Eight ruminally fistulated, yearling steers (two concurrent 4x4 Latin squares) were used to evaluate dietary Rumensin level (0, 30, 30/40 or 40 g/t), and bunk management strategy (ad libitum or clean bunk: 24- or 14-hour feed access). Rumensin decreased meal size and increased meal frequency without compromising intake. Clean bunk management increased consumption rate, meal size and ruminal pH change and pH variance. Steers with limited feed exposure are at greater risk for subacute acidosis; Rumensin effects consumption favorably for controlling acidosis, especially for cattle with limited feed exposure.
The Relationship Of Beef Primal Cut Composition To Overall Carcass Composition, Dana Hanson, Chris R. Calkins, Bucky Gwartney, John Forrest, Ron Lemenager
The Relationship Of Beef Primal Cut Composition To Overall Carcass Composition, Dana Hanson, Chris R. Calkins, Bucky Gwartney, John Forrest, Ron Lemenager
Nebraska Beef Cattle Reports
The amount of lean, subcutaneous fat, seam fat and bone of each of the four major primal cuts (round, rib, loin and chuck) were used in combination with yield grade to predict total side composition. The makeup of each primal is highly related to total carcass composition The decision of which primal to fabricate depends on the sex of the animal and which component (lean, subcutaneous fat, seam fat or bone) is of greatest interest.
Corn Bran, Solvent-Extracted Germ Meal, And Steep Liquor Blends For Finishing Yearlings, Daniel Herold, Rob Cooper, Terry J. Klopfenstein, Todd Milton, Rick Stock
Corn Bran, Solvent-Extracted Germ Meal, And Steep Liquor Blends For Finishing Yearlings, Daniel Herold, Rob Cooper, Terry J. Klopfenstein, Todd Milton, Rick Stock
Nebraska Beef Cattle Reports
Finishing performance of yearling steers was used to assess eight treatments containing corn wet milling byproducts. Interactions were encountered for dry matter intake, average daily gain and feed efficiency as level of dietary steep liquor/distillers solubles increased and corn bran and(or) corn bran with solvent- extracted germ meal decreased. Average daily gain and feed efficiency increased as steep liquor/distillers solubles replaced corn bran or a combination of corn bran and solvent-extracted germ meal. Steep liquor with distillers solubles had higher feeding value than corn bran or solvent-extracted germ meal and solvent-extracted germ meal had 19.9 percent higher energy than corn …
Hormonal Influence On Fat Synthesis In Cattle, Sheila Jacobi, Jess L. Miner
Hormonal Influence On Fat Synthesis In Cattle, Sheila Jacobi, Jess L. Miner
Nebraska Beef Cattle Reports
The ability of adenosine, insulin and human acylation-stimulating protein to modify fat synthesis was determined using cultures of fat tissue from steers. Adenosine did not influence fat synthesis. However, acylation stimulating protein and insulin promoted fat synthesis. These observations, coupled with knowledge of how fat synthesis is regulated in other species, justify investigation of whether cattle synthesize acylation-stimulating protein, and how this synthesis is regulated. An understanding of how acylation-stimulating protein production and action is regulated should expose potential places for intervention to manipulate fat synthesis in cattle.
Predicting Amount Of Compensatory Gain, Terry J. Klopfenstein, D. J. Jordon, Ivan G. Rush, Todd Milton
Predicting Amount Of Compensatory Gain, Terry J. Klopfenstein, D. J. Jordon, Ivan G. Rush, Todd Milton
Nebraska Beef Cattle Reports
In North American beef production systems, the entire spectrum of restriction and compensation is found. The area of compensatory gain is complex and not well understood, but critically important to the economics of cattle feeding. Several compensatory gain studies from the University of Nebraska have been compiled. The range in compensation observed with cattle grazing season-long is 19-88 percent with a mean of 53 percent. From these grazing studies, days of restriction appear to be related to percentage compensation. In the feedlot, even relatively short restrictions trigger compensatory gain; however, feed efficiency response to compensatory gain is
Evaluation Of Growth-Promoting Systems For Heifer Calves Finished In The Feedlot, Mari Lubberstedt, Terry L. Mader, Jill Heemstra, Kelly Letchenberg
Evaluation Of Growth-Promoting Systems For Heifer Calves Finished In The Feedlot, Mari Lubberstedt, Terry L. Mader, Jill Heemstra, Kelly Letchenberg
Nebraska Beef Cattle Reports
Two-hundred ten head of predominantly British and/or British x Continental cross heifers were assigned to six implant/reimplant treatment groups (five pens/treatment). In addition, melengestrol acetate (MGA) was provided to four treatment groups from day 28 until 48 hours prior to slaughter. Heifers not fed MGA had the greatest number of immature ovaries, although they were also the most efficient in feed conversion (lower feed to gain ratio). Heifers fed MGA and implanted with Finaplix were the least efficient in feed conversion
Hog Hair Meal As A Protein Source For Ruminants, Amie Mass, Ryan Mass, Terry J. Klopfenstein, D. J. Jordon
Hog Hair Meal As A Protein Source For Ruminants, Amie Mass, Ryan Mass, Terry J. Klopfenstein, D. J. Jordon
Nebraska Beef Cattle Reports
A cattle growth trial, two lamb digestion trials and a lamb growth trial evaluated hog hair meal as a protein source for ruminants. Although no differences in protein efficiency were found in the cattle trial, hair meal tended to be lower in protein efficiency than feather meal and soybean meal and true nitrogen digestibility of hair meal was lower than both feather meal and soybean meal. Treatments of additional steam pressure and hydrolysis time were applied to raw hog hair. True nitrogen digestibility increased as hydrolysis time and steam pressure increased. Metabolizable protein supplied by hair meal was increased by …
Protein Evaluation Of Treated Soybean Meal Products, Ryan Mass, D. J. Jordon, Terry J. Klopfenstein
Protein Evaluation Of Treated Soybean Meal Products, Ryan Mass, D. J. Jordon, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Three treated soybean meal (SBM) products: 1) nonenzymatically browned SBM (SoyPass®); 2)expeller SBM (SoyPlus®); and 3) a product of an unpublished manufacturing process (AminoPlus®), were compared using the following measurements: undegraded intake protein concentration (UIP), true nitrogen digestibility (TND) and metabolizable protein (MP) concentration. Soy Pass had the highest UIP, TND and MP values of the three treated SBM, followed by AminoPlus and then SoyPlus. The degree of heating may explain the differences in the three treated SBM products.
Performance Of Yearling Steers Fed Beet Pulp Or Chicory Pulp Rations, Ivan G. Rush, Brad Van Pelt
Performance Of Yearling Steers Fed Beet Pulp Or Chicory Pulp Rations, Ivan G. Rush, Brad Van Pelt
Nebraska Beef Cattle Reports
Substitution of beet pulp or chicory pulp for corn silage was evaluated in a 64-day feeding trial using yearling steers. Rations contained 27.7 percent (DM) beet pulp or chicory pulp. Chicory pulp utilized in this trial is a suitable feed resource for beef cattle. Feed intake was significantly lower with chicory pulp addition. Palatability or very high water content of rations which reduced ration quality are potential reasons for decreased consumption of rations containing chicory pulp.
N-Alkane As An Internal Market For Predicting Digestibility Of Forages, Russell Sandberg, Don C. Adams, Terry J. Klopfenstein, Rick Grant
N-Alkane As An Internal Market For Predicting Digestibility Of Forages, Russell Sandberg, Don C. Adams, Terry J. Klopfenstein, Rick Grant
Nebraska Beef Cattle Reports
Independent digestion trials were conducted with three immature grasses, mature grass hay, and alfalfa hay to compare n-alkane with indigestible ADF (IADF) as internal markers to predict in vivo dry matter digestibility (DMD). Forage DMD estimated with n-alkane ratios were lower than in vivo DMD. N-alkanes predicted higher DMD than IADF for alfalfa hay and two of the immature grasses. Comparison of freeze-drying and oven-drying on fecal n-alkane concentrations showed oven drying reduced amounts of n-alkane extracted for alfalfa hay but had no effect on grass hay. Although fecal recovery of markers was incomplete, more n-alkane was recovered than IADF.
Effects Of Time Of Weaning On Cow And Calf Performance, Chuck Story, Richard J. Rasby, Todd Milton, Mark Dragastin
Effects Of Time Of Weaning On Cow And Calf Performance, Chuck Story, Richard J. Rasby, Todd Milton, Mark Dragastin
Nebraska Beef Cattle Reports
Research investigating the effects of weaning calves at three different ages was conducted over four years at the Dalbey-Halleck Farm. Each year 180 spring calving cows had their calves weaned at 150 days of age, (n=60); 210 days of age, (n=60); or 270 days of age, (n=60). Weaning at 150 days resulted in greater cow weight and body condition. Pregnancy rate was similar among groups. Early weaned calves were fed a finishing ration longer, which resulted in heavier carcasses and a greater percentage grading at least Choice. Early weaning can be used to improve cow condition at calving.
Trace Mineral Supplementation And Ovarian And Luteal Function In Pubertal Heifers, Chuck Story, Richard J. Rasby, Dennis R. Brink, Jim Kinder, Tony Moravek
Trace Mineral Supplementation And Ovarian And Luteal Function In Pubertal Heifers, Chuck Story, Richard J. Rasby, Dennis R. Brink, Jim Kinder, Tony Moravek
Nebraska Beef Cattle Reports
Crossbred heifers (n=19) were used to determine the effects of feeding Cu, Co, Mn and Zn in amounts greater than recommended by the NRC on ovarian function. Heifers were fed hay ad libitum and individually fed a control (n=9) or trace mineral (n=10) supplement for 109 days. Dry-matter intake, average daily gain, day luteal phase began, length of luteal phase, daily mean progesterone production, follicular phase estradiol production and first wave dominant follicle size were not affected by mineral supplementation. However, heifers in the treatment group had fewer large follicles during the early portion of the estrous cycle.
Crude Protein And Energy Combinations For Finishing Yearling Steers, Burt Weichenthal, Ivan G. Rush, Brad Van Pelt
Crude Protein And Energy Combinations For Finishing Yearling Steers, Burt Weichenthal, Ivan G. Rush, Brad Van Pelt
Nebraska Beef Cattle Reports
Yearling Angus steers averaging 889 pounds were fed 12.1 or 13.8 percent crude protein with two energy levels during the first half of finishing, followed by 12.3 or 13.8 percent crude protein with the higher energy level during the second half of finishing. In a 126-day trial, finishing performance and carcass traits were not improved by feeding more than 12.1 percent crude protein or more than 56 Mcal/cwt NEg during the first half of finishing or more than 12.3 percent crude protein in the second half. These rseults indicate increased corn silage levels during the first half of finishing …
Optimal Conditions Of Cooler Aging For Beef, Chris R. Calkins, Rosemarie Rosario
Optimal Conditions Of Cooler Aging For Beef, Chris R. Calkins, Rosemarie Rosario
Nebraska Beef Cattle Reports
Steaks from longissimus muscle were stored at 30°F and 38°F for one, two, three, eight and 15 days postmortem to identify time/temperature combinations providing optimum tenderization. After completion of each treatment, steaks were sampled for myfibrillar protein degradation using gel electrophoresis and Warner-Bratzler shear force. Steaks aged at 38°F tended to have lower shear force values (greater tenderness) and shorter storage times than those stored at 30°F. Gel electrophoresis confirmed these results: samples stored at 38° F had considerable protein degradation in eight days, comparable to steaks aged at 30°F for 15 days.
Feedlot Marketing/Sorting Systems To Reduce Carcass Discounts, Rob Cooper, Terry J. Klopfenstein, Todd Milton, Dillon Feuz
Feedlot Marketing/Sorting Systems To Reduce Carcass Discounts, Rob Cooper, Terry J. Klopfenstein, Todd Milton, Dillon Feuz
Nebraska Beef Cattle Reports
A project involving 4,348 cattle and five commercial feedlots in Nebraska was conducted to evaluate marketing/ sorting systems to reduce overweight and overfat carcasses . At reimplant time, cattle were weighed and fat depth estimated either by ultrasound or by manual rib palpation. Cattle heavier and/or fatter than a predetermined weight and fat depth were identified for early sale. The system of sorting did not reduce carcass discounts. Reimplant fat depth was poorly correlated to carcass fat depth. At reimplant time (~90 days prior to slaughter), we were unable to consistently identify cattle which would become Yield Grade 4 carcasses.
Climate Affects Calf Birth Weights And Calving Difficulty, Gene H. Deutscher, Dave Colburn, Rex Davis
Climate Affects Calf Birth Weights And Calving Difficulty, Gene H. Deutscher, Dave Colburn, Rex Davis
Nebraska Beef Cattle Reports
A six-year study was conducted to investigate effects of winter temperatures on two-year-old cows (n=285) and their subsequent calf birth weights and calving difficulty in the spring. The winter of 1992-93 (coldest) was 11° F colder than the winter of 1994-95 (warmest). The coldest winter was followed by calf birth weights that were 11 pounds heavier with 29 percent greater calving difficulty compared to the warmest winter. Our results indicated that as average winter temperatures decreased 1° F, subsequent calf birth weights increased 1 pound and calving difficulties increased 2.6 percentage points. When blankets were placed on cows before calving, …
Effects Of Matching Protein To Requirements On Performance And Waste Management In The Feedlot, Galen E. Erickson, Terry J. Klopfenstein, Todd Milton, Dan Herold
Effects Of Matching Protein To Requirements On Performance And Waste Management In The Feedlot, Galen E. Erickson, Terry J. Klopfenstein, Todd Milton, Dan Herold
Nebraska Beef Cattle Reports
Four experiments were conducted, two with calves in the winter/spring and two with yearlings during the summer, to evaluate the effects of decreasing protein levels on nutrient balance in the feedlot. The control diet was formulated for 13.5 percent protein; the experimental diets were formulated using the 1996 NRC model to predict protein requirements. Nutrient balances for organic matter (OM) and nitrogen (N) were measured. Nitrogen intake and subsequent excretion were decreased with steers fed the experimental treatment. During the summer more N was removed from pens on the experimental treatment since OM excretion was greater which led to decreased …
Fat Addition And Restricted Feeding Of Corn Gluten Feed Diets For Cattle Exposed To Environmental Stress, Jill Heemstra, Terry L. Mader, Tony Scott, John Gaughan
Fat Addition And Restricted Feeding Of Corn Gluten Feed Diets For Cattle Exposed To Environmental Stress, Jill Heemstra, Terry L. Mader, Tony Scott, John Gaughan
Nebraska Beef Cattle Reports
One winter and one summer trial were conducted comparing dry rolled corn (DRC) to DRC + corn gluten feed (CGF) finishing diets. No performance differences among winter study treatment groups were found. In the 106- day summer trial, DRC or CGF (40 percent DM)-based diets were fed as high-energy, 8 percent roughage diets either ad libitum (HE), restricted to approximately 90 percent of HE (RE) or fed as moderate energy, 20 percent roughage diets (HR). Feeding CGF diets or lowering metabolizable energy (ME) intake through RE or HR diet regimes did not improve feed to gain ratios or appear to …
Steer Performance Within Summer Grazing Systems, D. J. Jordon, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams, Todd Milton, Rob Cooper
Steer Performance Within Summer Grazing Systems, D. J. Jordon, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams, Todd Milton, Rob Cooper
Nebraska Beef Cattle Reports
A growing/finishing trial in 1996-97 evaluated summer grazing systems and subsequent finishing performance. Steers were wintered on cornstalks and assigned to one of three summer grazing systems: 1) Sequential removal of cattle from bromegrass, 2) Bromegrass/warm season grass, or 3) Sandhills range. Steers on the sequential bromegrass treatment gained fastest in the summer, but had a higher slaughter breakeven. Sequential bromegrass, steers were on grass where cost of grain was fixed, for fewer days; therefore, breakeven was increased. Steers on the bromegrass/ warm-season treatment had the lowest slaughter breakevens due to more total weight gain on forage. Slaughter breakevens were …
Calf Performance Grazing Crop Residues In Combination With Rye In Fall And Winter, D. J. Jordon, Mark Blackford, Todd Milton, Terry J. Klopfenstein, Rob Cooper
Calf Performance Grazing Crop Residues In Combination With Rye In Fall And Winter, D. J. Jordon, Mark Blackford, Todd Milton, Terry J. Klopfenstein, Rob Cooper
Nebraska Beef Cattle Reports
Two trials in the fall and winter of 1997-98 evaluated calf performance when grazing either rye with crop residues or crop residues alone. While not significant, calves grazing rye followed by corn residues tended to gain faster compared to calves grazing residues alone (2.26 versus 1.84 lb/d, respectively). Calves grazing corn residues only fully compensated for the weight difference at the end of winter grazing by slaughter. No differences were found in finishing performance or slaughter breakevens. In trial 2, steers grazed rye and milo or milo residue alone. Steers grazing rye/milo gained faster (P < .05). Using rye to supplement animals on milo residues resulted in steers not leaving the rye portion of the field.
Evaluation Of Revalor®-G As An Initial Implant For Yearling Steers, Terry L. Mader, Jill Heemstra, Robert Brandt Jr., Gary Sides
Evaluation Of Revalor®-G As An Initial Implant For Yearling Steers, Terry L. Mader, Jill Heemstra, Robert Brandt Jr., Gary Sides
Nebraska Beef Cattle Reports
Three hundred thirty-six English crossbred steers (715 lb) were used to compare effects of reimplanting with Revalor®-S (administered on day 66) after three different initial implants (administered on day zero), to single implantation with Revalor-S (administered on day zero or day 66). Over the entire study, implanted steers gained faster and more efficiently than non-implanted control steers. Steers implanted initially with Revalor-G or Synovex-S gained faster than steers implanted only once. Of the three reimplant treatments, only those initially implanted with Revalor-G had improved feed efficiency compared with single-implanted steers on a live basis. Compared to non-implanted controls, marbling score …
Effects On Protein Content And Digestibility Of Fall Diets In The Nebraska Sandhills, Trey Patterson, Terry J. Klopfenstein, Don C. Adams, Walter H. Schacht, Patrick E. Reece, Jacqueline A. Musgrave, Amy Johnson
Effects On Protein Content And Digestibility Of Fall Diets In The Nebraska Sandhills, Trey Patterson, Terry J. Klopfenstein, Don C. Adams, Walter H. Schacht, Patrick E. Reece, Jacqueline A. Musgrave, Amy Johnson
Nebraska Beef Cattle Reports
Four blocks of Sandhills rangeland (three pastures/block) were used to test summer grazing date and fall grazing intensity effects on protein content and digestibility of fall diets. Summer treatments applied to each block were 1) no summer grazing, 2) June grazing and 3) July grazing. Each block was grazed in sequence at six different stocking rates the following fall by six esophageally fistulated cows (two per pasture). Digestibility of fall diets declined linearly and crude protein declined quadratically as fall stocking intensity progressively increased. June grazing increased the CP content of fall diets compared to July or no summer grazing, …