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Full-Text Articles in Animal Sciences
A Pilot Study Of The Impact Of Metaphylactic Treatment At Processing On Lung Lesions At Slaughter, W. B. Epperson
A Pilot Study Of The Impact Of Metaphylactic Treatment At Processing On Lung Lesions At Slaughter, W. B. Epperson
South Dakota Beef Report, 2000
The utility of metaphylactic antibiotic/anti-inflammatory treatment in prevention of cattle lung lesions was examined. Sixty-nine, single source, ranch direct, fall weaned steers were allocated to treatment or no treatment groups at feedlot arrival in February, 1999. Treatment consisted of single subcutaneous administration of NuflorTM (florfenicol, Schering-Plough Animal Health) at 18 mg/lb bodyweight and BanamineTM (flunixin meglumine, Schering-Plough Animal Health) at 1 mg/lb bodyweight. All steers were weighed, vaccinated with a modified live IBR/PI3 vaccine, implanted, and identified by ear tag. Cattle were fed for maximum gain on a corn-based diet. At harvest, after 133 days on feed, lungs were observed …
Defining Failure Of Passive Transfer In South Dakota Beef Calves, A. K. Courtney, W. B. Epperson, T. A. Wittig, R. J. Pruitt
Defining Failure Of Passive Transfer In South Dakota Beef Calves, A. K. Courtney, W. B. Epperson, T. A. Wittig, R. J. Pruitt
South Dakota Beef Report, 2000
Failure of calves to ingest and absorb immunoglobulin from colostrum is a risk factor for illness and decreased performance. Blood samples were taken from 752 calves at three SDSU research units. Total protein in blood, closely correlated to colostral immunoglobulin absorption, was determined and calf health records were collected. Using this data, a classification table of sensitivity and specificity was constructed to determine the relationship between total protein and calf illness and to classify calves as having adequate colostral absorption or inadequate colostral absorption (failure of passive transfer). Along with sensitivity and specificity, positive and negative likelihood ratios were calculated …
Steps For Warner-Bratzler Shear Force Assessment Of Cooked Beef Longissimus Steaks At South Dakota State University, K. W. Bruns, D. M. Wulf, R. H. Pritchard
Steps For Warner-Bratzler Shear Force Assessment Of Cooked Beef Longissimus Steaks At South Dakota State University, K. W. Bruns, D. M. Wulf, R. H. Pritchard
South Dakota Beef Report, 2000
This article outlines the current protocol for measuring tenderness of cooked beef longissiumus steaks at South Dakota State University using a Warner-Bratzler shear machine.
The Influence Of Body Weight And Marbling Epd On The Relationship Of Intramuscular Fat Content And The Value Of Lean Retail Product In Serially Slaughtered Angus Steers, K. W. Bruns, R. H. Pritchard, D. L. Boggs
The Influence Of Body Weight And Marbling Epd On The Relationship Of Intramuscular Fat Content And The Value Of Lean Retail Product In Serially Slaughtered Angus Steers, K. W. Bruns, R. H. Pritchard, D. L. Boggs
South Dakota Beef Report, 2000
It is unclear how age, physiological maturity, and genetics affect intramuscular fat (IM) desposition in cattle. The study used beef cattle of known age and parentage to study the development of primal cuts, total carcass fat and IM fat depots as part of the growth process. Selecting cattle for marbling with the use of paternal grandsire's EPD for marbling was not indicative of differences in the onset or the rate, of development of marbling. Greater differences in EPD for marbling may be needed to observe phenotypic differences. Harvest group affected the level and extent of marbling (P<.10), however there was no harvest group x marbling group interactions indicating no differences occurred in the pattern of marbling development due to marbling EPD. Carcasses expressed a Small degree of marbling between the hot carcass weights of 550 and 650 Ibs. and at a back fat depth of approximately .30 in. In this study utilizing non-implanted steers of the same breed, we found that as days on feed increased, hot carcass weights, back fat depth, and percent carcass fat increased along with marbling score as well as percent 12th rib lipid content. No differences were observed in the weight of the primal cuts when expressed as a percentage of the chilled carcass between marbling groups at each of the five end points. As HCW increased across harvest groups, primal weight increased without a change in the percentage of the carcass represented by the middle meats (sirloin, shortloin, rib).
Effects Of Breed-Type And Breeding System On Efficiency Of Weaned Calf Production, D. M. Marshall
Effects Of Breed-Type And Breeding System On Efficiency Of Weaned Calf Production, D. M. Marshall
South Dakota Beef Report, 2000
The objective of this study was to evaluate effects of cow breed-type (two-breed rotations of Simmental x Hereford, Angus x Hereford, and Tarentaise x Hereford) and breeding system (rotational vs terminal sires) on production efficiency to weaning. Cows were limit fed in drylot for one year to simulate weight change of range cows. Both cow breed-type and sire type significantly affected efficiency of weaned calf production (weaning weight divided by cow and calf creep feed ME intake). However, there was an interaction of cow breed-type with breeding system for efficiency of weaned calf production. In particular, Hereford-sired Simmental-Hereford cows had …
Associations Of Beef Production Traits With Polymorphisms In The Growth Hormone Gene And Insulin-Like Growth Factor-1 Gene, D. M. Marshall, J. Kim
Associations Of Beef Production Traits With Polymorphisms In The Growth Hormone Gene And Insulin-Like Growth Factor-1 Gene, D. M. Marshall, J. Kim
South Dakota Beef Report, 2000
The effects of cow and (or) calf genotype for two candidate gene markers [growth hormone (GH) and insulin-like growth factor-I (IGF-1) genes] on production traits were evaluated in a beef cattle herd. The GH polymorphism is located in exon V of the GH gene and is associated with a leucine/valine amino acid substitution. The IGF-1 polymorphism is located in the 5' flanking region of the IGF-1 gene. Cow GH genotype was not significantly associated with cow production traits (milk yield, average weight, hip height, and condition score) or progeny weight at birth or weaning. The regression of weaning weight on …
Comparison Of Estradiol-Trenbolone Acetate Implant Programs For Yearling Steers Of Two Genotypes, Robbi H. Pritchard
Comparison Of Estradiol-Trenbolone Acetate Implant Programs For Yearling Steers Of Two Genotypes, Robbi H. Pritchard
South Dakota Beef Report, 2000
Yearling steers (n = 400) were used to evaluate relative payout periods for implants when feeding high grain content diets. Implant treatments included (1) control (nonimplanted), (2) Synovex Plus, (3) revalor-S, and (4) Ralgrorevalor-S. The Synovex Plus (2), revalor-S (3) and Ralgro (4) were administered on day 1. The reimplant with revalor-s (4) was administered after 56 d on feed. Steers were managed in two groups. Initial BW and days fed were 782 Ib, 131 d (Group I), and 661 Ib, 145 d (Group 11). Implants increased production rates and efficiencies, increased carcass size and reduced marbling when compared to …
An Evaluation Of Three Trm Feed-Mixing Wagons, B. J. Johnson, R. H. Pritchard, S. L. Bjornson, W. M. Cerkoney
An Evaluation Of Three Trm Feed-Mixing Wagons, B. J. Johnson, R. H. Pritchard, S. L. Bjornson, W. M. Cerkoney
South Dakota Beef Report, 2000
Three mixer wagons, three-auger, reel-type auger, and four-auger, were used to evaluate the adequacy of mix of a grower diet. All three mixers were considered in good mechanical condition. The grower diet contained 12.4% rolled corn, 23.7% wet corn gluten feed, 42% soybean hulls, 15.8% grass hay, and 6.19% liquid supplement on an as-is basis. Monensin was added to the diet at 28glton on an as-fed basis. Samples were obtained after 2, 4, 6, and 8 minutes (min) of mixing. Following the 8-min mixing time, the feed was unloaded as a windrow onto a concrete pad. Samples were obtained from …
Effect Of Calving Time And Weaning Time On Feedlot Performance - A Preliminary Report, R. J. Pruitt, B. J. Johnson, W. B. Epperson, B. D. Rops
Effect Of Calving Time And Weaning Time On Feedlot Performance - A Preliminary Report, R. J. Pruitt, B. J. Johnson, W. B. Epperson, B. D. Rops
South Dakota Beef Report, 2000
Cows grazing native range year round at the SDSU Cottonwood Research Station were allotted to 3 management systems; Group 1) a calving season starting in mid March with calves weaned in late October, Group 2) a calving season starting in mid March with calves weaned in mid September, and Group 3) a calving season starting early May with calves weaned in late October. Following weaning the steer calves are transported to the Southeast South Dakota Experiment Farm. For two calf crops the steer calves have been fed a high grain diet for maximum gain from weaning to harvest. Group 2 …
Relative Feed Values For High Fiber Corn And Conventional Corn Silage For Growing Steers, C. J. Mueller, R. H. Pritchard, Z. W. Wicks Iii
Relative Feed Values For High Fiber Corn And Conventional Corn Silage For Growing Steers, C. J. Mueller, R. H. Pritchard, Z. W. Wicks Iii
South Dakota Beef Report, 2000
The relative feed value of a corn variety developed for the primary purpose of corn silage production was evaluated using a 70-d steer growing trial. The high fiber corn (CSV1) and conventional corn (CSV2) varieties were planted in adjacent plots and harvested at approximately 30% DM. Silage varieties were stored in separate bunker silos and allowed to ferment for 52 d. CSVl yielded 5.4 T/acre while CSV2 yielded 4.7 T/acre (DM basis). Variety affected (P<.001) NDF (43.3% vs 38.6%), ADF (24.1% vs 20.2%), lignin (5.7% vs 4.6%), starch (18.69% vs 30.18%) and CP content (7.37% vs 6.89%) of CSVl and CSV2, respectively. IVDMD was not, different (P>. 10) between varieties. One hundred sixty steers were divided into light (516 ± 7.1 Ib.) and heavy (595 ± 9.7 Ib.) BW groups. Steers …
Influence Of Dietary Mp On The Production Rates And N Usage By Steers Fed High Grain Content Diets, R. H. Pritchard, K. W. Bruns, S. J. Bierman
Influence Of Dietary Mp On The Production Rates And N Usage By Steers Fed High Grain Content Diets, R. H. Pritchard, K. W. Bruns, S. J. Bierman
South Dakota Beef Report, 2000
An experiment was conducted to determine if dietary metabolizable protein (MP) could be manipulated to reduce N content of feedlot effluent without compromising production rates in yearling steers fed high grain content diets. Three feeding programs included: LO) 11 % CP fed throughout; HI) 13% CP fed throughout; and LHL) 11 % fed from d 1 to 35, 13% CP (HI) fed d 36 to 94 and 1 1 % CP (LO) fed from d 95 to 1 17. An estradiol-trenbalone acetate implant was administered on d 35. There were 5 pens of 8 steers (BW=7561b) assigned to each treatment. …
Field Peas In Finishing Cattle Diets And The Effect Of Processing, C. P. Birkelo, B. J. Johnson, B. D. Rops
Field Peas In Finishing Cattle Diets And The Effect Of Processing, C. P. Birkelo, B. J. Johnson, B. D. Rops
South Dakota Beef Report, 2000
Field peas are usually grown for human consumption. However, quality problems can make them available at times for feeding to livestock. Field peas contain a moderate amount of protein (20-29%) which is highly rumen degradable. They are high in starch (41- 54%) and low in fiber (<9%) suggesting fairly high energy content. The few cattle feeding studies conducted to date have focused on their use in dairy cows and growing calves. No feeding trials have apparently been conducted with finishing cattle fed high-energy diets. The objectives of this study were 1) to evaluate yellow field peas as a replacement for soybean meal and corn grain in a high energy finishing diet and 2) to determine whether or not rolling altered their feeding value.
The Effects Of Energy Sournce And Yeast (Biosaf Sc47) On Feedlot Performance During The Receiving Period, B. J. Johnson, B. D. Rops
The Effects Of Energy Sournce And Yeast (Biosaf Sc47) On Feedlot Performance During The Receiving Period, B. J. Johnson, B. D. Rops
South Dakota Beef Report, 2000
An experiment was conducted to determine the effects of soyhulls and Biosaf yeast (Saccharomyces cerevisiae) on feedlot performance during the receiving period of newly weaned calves. Two energy sources; corn and soyhulls were fed with or without Biosaf yeast (10g/hd/d). We utilized 154 head of newly weaned steer calves (BW=509 Ib). Energy source had no effect (P>.10) on feedlot performance during the 35d receiving period. Inclusion of Biosaf yeast had no effect on feedlot performance during the 35d receiving period. Consequently, feed cost of gain ($/cwt) was identical for all treatments. Those results indicate soyhulls can replace corn in …
Evaluating The Agronomic Feasibility Of Planting Late Season Corn For Feedlot Cattle, W. M. Cerkony, R. H. Pritchard, Z. W. Wicks Iii
Evaluating The Agronomic Feasibility Of Planting Late Season Corn For Feedlot Cattle, W. M. Cerkony, R. H. Pritchard, Z. W. Wicks Iii
South Dakota Beef Report, 2000
Yield, Ib/acre, bushel weight (BD), Ib/bu, relative maturity (RELMAT), chemical composition and in vitro dry matter digestibility (IVDMD) were used to screen corn varieties In = 20) of varying maturities grown under the stress of a shortened growing season. Corn varieties were planted in late June of 1996. Whole shell corn (WSC) and ear corn (EC) were harvested. Bushel weight was quantified on WSC. Yields for WSC, and EC were 1941 + 706 and 2307 ± 997 Ib DM/acre, respectively. Whole shell corn and EC were sorted into yield (YGP) groups. Whole shell corn yields were 2942 ± 248, 2305 …
Interpreting Experiment Results, D M. Marshall
Interpreting Experiment Results, D M. Marshall
South Dakota Beef Report, 2000
No abstract provided.
Effect Of Calving Time And Weaning Time On Cow And Calf Performance - A Preliminary Report, R. J. Pruitt, B. Epperson, B. Johnson, D. Zalesky, R. Haigh, D. Young
Effect Of Calving Time And Weaning Time On Cow And Calf Performance - A Preliminary Report, R. J. Pruitt, B. Epperson, B. Johnson, D. Zalesky, R. Haigh, D. Young
South Dakota Beef Report, 2000
Cows grazing native range year round were allotted to 3 management systems: 1.) A calving season starting in mid March with calves weaned in late October; 2) A calving season starting in mid March with calves weaned in mid September; and 3) A calving season starting early May with calves weaned in late October. After 2 years of the study, pregnancy rate and calving interval were not affected by management system. Average weaning weight was the highest for the March calving/October weaned group in both years. In the first year of the study, severe winter weather caused a lower calf …