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Cattlemen's Day

1992

Articles 1 - 30 of 45

Full-Text Articles in Life Sciences

Effects Of Niacin And Aspirin On Serum Prolactin And Body Temperature Of Heifers Fed Endophyteinfected Tall Fescue, Robert L. Larson, L.R. Corah Jan 1992

Effects Of Niacin And Aspirin On Serum Prolactin And Body Temperature Of Heifers Fed Endophyteinfected Tall Fescue, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Feeding niacin to cattle consuming endophyte (Acremonium coenophialum)-infected tall fescue elevated their serum prolactin concentrations to levels similar to those of heifers fed hay containing a low content of endophyte. Heifers fed high-endophyte hay, with or without aspirin, had lower serum prolactin concentrations than heifers fed low-endophyte fescue hay (P<.1). Compared to control cattle fed high-endophyte hay, neither niacin nor aspirin lowered morning or evening body temperatures during the period August 16 to September 4. Feeding aspirin did not lower body temperature or increase prolactin concentration in animals fed high-endophyte fescue forage. Some benefit was seen when niacin was added to the diet, as evidenced by higher (P<.01) prolactin concentrations; however body temperature was not lowered.


Production And Marketing Factors Influencing Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder Jan 1992

Production And Marketing Factors Influencing Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

An analysis of more than 1400 pens of cattle marketed during 1990 examined the influence of several cattle traits and marketing factors on fed cattle prices. Cattle quality grade had an important impact on packer bids and feedyard asking prices. However, both feedyard asking and packer purchase prices reflected less than 25%, on average, of estimated wholesale value differentials. Other factors, including estimated dressing percentage, finish uniformity, cattle weight, number of head purchased, presence of heiferettes, and cattle type had significant price impacts. Feedyards generally received what they asked for cattle; 65% of the pens sold for their asking prices ...


Heritabilities And Genetic Correlations Of Ultrasound-Measured Ribeye Area With Other Performance Traits In Brangus Cattle, M.Z. Johnson, R.R. Schalles, W. Olson, Michael E. Dikeman Jan 1992

Heritabilities And Genetic Correlations Of Ultrasound-Measured Ribeye Area With Other Performance Traits In Brangus Cattle, M.Z. Johnson, R.R. Schalles, W. Olson, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Heritabilities and genetic correlations for ultrasound-measured ribeye area and fat thickness, as well as growth traits and scrotal circumference, were determined using performance records of 1613 Brangus calves born from 1987 to 1990. Moderate heritabilities of .39 for weaning and .40 for yearling ultrasound- measured ribeye area indicate that selection to change these traits should be effective. The positive, and generally large, genetic correlations between ultrasound-measured ribeye areas and growth traits indicate that genetic change of these traits can be made in tandem. The low heritability (.14) of fat thickness, the small amount of fat, and the lack of variation ...


Causes Of Diarrhea, Pneumonia, And Abortion In 1991 Cattle Submissions To The Ksu Veterinary Diagnostic Laboratory, R.K. Frank, M.W. Vorhies, M. M. Chengappa Jan 1992

Causes Of Diarrhea, Pneumonia, And Abortion In 1991 Cattle Submissions To The Ksu Veterinary Diagnostic Laboratory, R.K. Frank, M.W. Vorhies, M. M. Chengappa

Kansas Agricultural Experiment Station Research Reports

Causes of diarrhea, pneumonia, and abortion in Kansas cattle submissions to the Kansas State University Veterinary Diagnostic Laboratory during 1991 were summarized. Antimicrobial susceptibility results for Pasteurella haemolytica, Pasteurella multocida, Hemophilus somnus, and Salmonella spp., the common causes of pneumonia and/or diarrhea in cattle with increasing antibiotic resistance patterns, were also summarized. The most commonly diagnosed causes of diarrhea in young calves (under 1 month of age) were coronavirus, Escherichia coli, and Salmonella. The three most common causes of diarrhea in 1 to 18 month-old cattle were BVD virus, coccidia, and Salmonella. Most respiratory submissions were 7- to 18-month-old ...


Rate And Extent Of Losses From Top Spoilage In Pilot-Scale, Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin, John E. Boyer Jan 1992

Rate And Extent Of Losses From Top Spoilage In Pilot-Scale, Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin, John E. Boyer

Kansas Agricultural Experiment Station Research Reports

Corn and forage sorghum silages were stored in pilot-scale silos for 180 days, and dry matter (DM) and organic matter (OM) recoveries and estimated OM recovery were measured at three depths within the top 3 ft. of silage. The unsealed silages deteriorated badly in the top 12 in. Actual DM and OM losses in the top 24 in. were higher in unsealed than sealed silages at each successive storage period (7 to 180 days). The unsealed silages began to deteriorate immediately in the top 12 in. in both crops, and deterioration progressed to the second 12 in. by 90 days ...


Influence Of Source And Amount Of Dietary Protein On The Performance And Reproductive Function Of First-Calf Heifers, W.C. Rusche, R.C. Cochran, L.R. Corah, Jeffrey S. Stevenson, D.L. Harmon Jan 1992

Influence Of Source And Amount Of Dietary Protein On The Performance And Reproductive Function Of First-Calf Heifers, W.C. Rusche, R.C. Cochran, L.R. Corah, Jeffrey S. Stevenson, D.L. Harmon

Kansas Agricultural Experiment Station Research Reports

Increasing the amount of dietary protein above the NRC requirement increased weight gain of nursing first-calf heifers. Feeding a protein source with higher ruminal escape potential and increasing protein in the diet both improved calf gains. No significant changes in reproductive function or milk production were observed from either source or amount of dietary protein.


Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope Jan 1992

Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

One hundred-eighty British crossbred steers (760 lb) were used in a 3x2 factorially arranged experiment to evaluate the main effects of alfalfa form (chopped hay, dehydrated pellets, or a 50:50 mixture of hay:dehy) and level (5 or 10% of diet DM) on finishing steer performance. Alfalfa (third-cutting, 23.9% CP) was harvested in alternate rows from a common field. No interactions between alfalfa form and level were detected. Steers fed chopped hay or the 50:50 mixture gained faster (P < .05), consumed more feed (P < .05), and had heavier final and carcass weights (P < .05) than steers fed dehy pellets. Steers fed 10% alfalfa gained faster (P < .05), consumed more feed (P < .0003), and had heavier carcass weights (P < .02) vs those fed 5% alfalfa. Feed efficiency was unaffected by alfalfa form or level. Lower feed intakes and numerically higher incidences of liver abscesses indicated less ruminal tactile stimulation and more subacute acidosis for dehy pellets vs hay or the 50:50 mixture and for 5 vs 10% alfalfa, respectively. Positive associative responses of 5.1% (P = .07) on daily gain and 2.9% (P = .11) on dry matter intake suggested that the 50:50 mixture provided enough long particles for adequate rumen function at the alfalfa levels studied. Our results suggests more dehy pellets than chopped hay must be fed to provide similar roughage value.


Effects Of Interactions Between Aspergillus Oryzae Extract (Amaferm) And Antimicrobial Compounds On The Growth Of Ruminal Bacteria, A.A. Beharka, Tiruvoor G. Nagaraja Jan 1992

Effects Of Interactions Between Aspergillus Oryzae Extract (Amaferm) And Antimicrobial Compounds On The Growth Of Ruminal Bacteria, A.A. Beharka, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

The effect of Amaferm, with or without antimicrobial compounds, was determined on the growth rate of pure cultures of predominant ruminal bacteria. Adding Amaferm to media containing chlortetracyline or neomycin tended to diminish the negative effects of those compounds on the growth rate of some ruminal bacteria, even when they had shown no positive response to Amaferm alone. However, adding Amaferm to media containing tylosin decreased the growth rate of Selenomonas ruminantium D. These results indicate that Amaferm interacts both positively and negatively with certain antimicrobial compounds.


Use Of Low-Level Grain Supplementation In An Intensive-Early Stocking Program: Influence On Daily Gain And Forage Production, R.C. Cochran, E.S. Vanzant, Robert T. Brandt Jr., Clenton E. Owensby, Lisa M. Auen Jan 1992

Use Of Low-Level Grain Supplementation In An Intensive-Early Stocking Program: Influence On Daily Gain And Forage Production, R.C. Cochran, E.S. Vanzant, Robert T. Brandt Jr., Clenton E. Owensby, Lisa M. Auen

Kansas Agricultural Experiment Station Research Reports

A 4-year experiment was conducted to evaluate the effect of increasing amounts of grain supplementation on steer gains and forage production in pastures managed under an intensive-early stocking system. Average daily gain tended to increase in direct proportion to increasing level of sorghum grain supplementation (2.19, 2.43 and 2.59 lb/day for the control, 2 and 4 lb/day supplement levels, respectively). The amount of grass remaining in the pastures at the end of the grazing season (approximately July 15) also increased in direct proportion to increasing sorghum grain supplementation. Forage remaining in the pastures at the ...


The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah Jan 1992

The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Two Kansas cow/calf herds known to be copper deficient were utilized to examine the effect of slow-release copper boluses. In herd I, 34 spring-calving cows and calves were divided into a treated and control group at 3-4 months following calving. In herd II, 1106 fall-calving cows and 172 calves were divided into a treated and control group at 3-4 months following calving. In both herds, cow liver and serum samples were collected and assayed for copper and iron. Cows in herd II were also examined for various reproductive parameters. Calf ADG was monitored over a 42-day treatment period in ...


Effect Of Supplemental Grain Sorghum And Overseeding With Ladino Clover On Grazing And Subsequent Feedlot Performance Of Steers Early-Intensively Grazed On Acremonium Coenophialum - Infected Tall Fescue Pastures, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas, F.K. Brazle Jan 1992

Effect Of Supplemental Grain Sorghum And Overseeding With Ladino Clover On Grazing And Subsequent Feedlot Performance Of Steers Early-Intensively Grazed On Acremonium Coenophialum - Infected Tall Fescue Pastures, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Eighty mixed breed steers (avg. wt. 560 lb.) were used to evaluate the effect on grazing gain and subsequent feedlot performance of different management options for steers early-intensively grazing Acremonium coenophialuminfected tall fescue pastures. Steers were allotted to pastures of infected fescue pastures or infected fescue overseeded with ladino clover and received no supplement or were offered grain sorghum at .25% of their body weight. Neither supplementation nor overseeding affected grazing or feedlot performance. However, grain supplementation on overseeded pastures reduced subsequent feedlot feed efficiency (P<.10). These management options did not substantially affect grazing or subsequent feedlot performance by steers early-intensively grazing infected fescue pastures.


Synchronization Of Estrus In Yearling Beef Heiferswith The Melengestrol Acetate®/Prostaglandin F2"System: Ii. Timed Insemination, Robert L. Larson, L.R. Corah, S.V. Viker Jan 1992

Synchronization Of Estrus In Yearling Beef Heiferswith The Melengestrol Acetate®/Prostaglandin F2"System: Ii. Timed Insemination, Robert L. Larson, L.R. Corah, S.V. Viker

Kansas Agricultural Experiment Station Research Reports

Inseminating heifers 72 hr after the PG injection in the melengestrol acetate/ prostaglandin F (MGA®/PG) estrous synchronization system, without regard to behavioral estrus, tended to improve (P=.2) the percent of heifers pregnant to artificial insemination (AI) when compared to synchronized heifers bred 12 h after they were first detected in estrus. In the timed inseminated treatment, heifers exhibiting behavioral estrus 48 to 72 h after PG tended to have a higher (P<.12) conception rate to AI than heifers showing estrus within 48 h after PG. For situations in which the number of heifers conceiving to AI is more economically important than first service conception rate, or when labor restrictions make estrous detection impossible, timed insemination at 72 h after PG in the MGA/PG system shows promise as a management option.


Comparison Of Feeding Calves Vs. Yearlings, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman Jan 1992

Comparison Of Feeding Calves Vs. Yearlings, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Data from the 207 crossbred steers used in this study indicate that when calves are placed in the feedlot on a finishing ration at weaning, they will have better feed efficiencies, greater lifetime ADGs, lighter carcass weights, and equal carcass qualities compared to those placed as yearlings. In recent times, heavy carcass weights have been rather common in the industry. Every over-weight steer had a desirable weight at one time, and this study shows that they would have produced a desirable carcass if managed correctly.


Effect Of Presponse® On The Gain And Health Of Long-Hauled, Newly Arrived Calves, F.K. Brazle Jan 1992

Effect Of Presponse® On The Gain And Health Of Long-Hauled, Newly Arrived Calves, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Five hundred mixed-breed steer and bull calves (246 lbs) were divided into two treatment groups, with one group receiving a new Pasteurella haemolytica vaccine (Presponse®) at arrival. There was no difference between groups in terms of gain, mortality, or morbidity during the 32-day receiving study. The Presponse group required fewer (P<.09) medication days per animal purchased, resulting in $1.68 less drug cost per head than the control group.


Effect Of Deworming With Ivomec® On Reproductive Performance Of Yearling Beef Heifers, Robert L. Larson, L.R. Corah, M.F. Spire, R.C. Cochran Jan 1992

Effect Of Deworming With Ivomec® On Reproductive Performance Of Yearling Beef Heifers, Robert L. Larson, L.R. Corah, M.F. Spire, R.C. Cochran

Kansas Agricultural Experiment Station Research Reports

To determine the effect of deworming fallborn yearling heifers on reproductive parameters, 78 heifers were allotted to a either Ivomec® or control treatments. The heifers were dewormed in June and October when they were approximately 7 and 11 months old, respectively. Ivomec effectively lowered fecal egg counts from treated heifers compared to controls. In these heifers that were maintained on a marginal plane of nutrition, deworming not only improved weight gains but also hastened onset of puberty and improved conception rate during a 60-day breeding season. The positive effect of Ivomec on these reproductive characteristics could not be explained by ...


Record-Keeping Systems For Beef Safety And Feedlot Health, C.D. Cranwell, D.D. Simms Jan 1992

Record-Keeping Systems For Beef Safety And Feedlot Health, C.D. Cranwell, D.D. Simms

Kansas Agricultural Experiment Station Research Reports

Three hundred nine feedlots were mailed questionnaires to ascertain the types of recordkeeping systems currently being used to monitor health programs and FDA-specified treatment withdrawal times. Microcomputer systems were of special interest. Approximately one third of the feedlots responded. A majority with a one-time feeding capacity of more than 10,000 head were using a microcomputer record-keeping system, whereas most of those with fewer than 10,000 head used a manual, paper-based system. Those feedlots using computerized record-keeping systems had purchased their software package from one of five companies. Managers felt these software packages were adequate for billing customers, monitoring ...


Performance Of Rat-Tail Calves, R.R. Schalles, Douglas A. Powell, L.V. Cundiff, J.B. Glaze Jan 1992

Performance Of Rat-Tail Calves, R.R. Schalles, Douglas A. Powell, L.V. Cundiff, J.B. Glaze

Kansas Agricultural Experiment Station Research Reports

The rat-tail syndrome occurs in a small percentage of calves produced by crossing Continental breeds of cattle with Angus or Holstein. These calves are characterized by short, curly, malformed, sometimes sparse body hair and an abnormal tail switch. The performance of 43 rat-tail calves was compared to that of 570 normal calves of the same breeding and contemporary groups. All rat-tail calves were sired by Simmental bulls and were from cows with various percentages of Angus breeding. As the percentage of Angus increased, the frequency of rat-tail calves increased. The rat-tail condition had no effect on birth weight, weaning weight ...


Losses From Top Spoilage In Corn And Forage Sorghum Silages In Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin Jan 1992

Losses From Top Spoilage In Corn And Forage Sorghum Silages In Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin

Kansas Agricultural Experiment Station Research Reports

Corn and forage sorghum silages were stored in small (simulated), farm-scale, bunker silos for 180 days, and dry matter (DM) and organic matter (OM) losses; fermentation characteristics; and temperatures were measured at 10, 20, and 30 inches from the original silage surface. Sealing the exposed surface significantly increased DM and OM recoveries in both crops, regardless of depth. Immediate sealing preserved more DM and OM than delayed sealing, particularly at the 10-in. depth. The unsealed silages from both crops maintained dramatically higher temperatures within the top 3 ft. than sealed silages. As expected, the unsealed silages deteriorated completely at 10- ...


Effects Of Estradiol Or An Estradiol-Trenbolone Acetate Reimplant Scheme And Time On Feed On Performance And Carcass Traits Of Finishing Steers, Robert T. Brandt Jr., Michael E. Dikeman, Sally L. Stroda Jan 1992

Effects Of Estradiol Or An Estradiol-Trenbolone Acetate Reimplant Scheme And Time On Feed On Performance And Carcass Traits Of Finishing Steers, Robert T. Brandt Jr., Michael E. Dikeman, Sally L. Stroda

Kansas Agricultural Experiment Station Research Reports

Two hundred eighty-eight predominantly British and British crossbred steers (702 lb) were used in a 2x3 factorially arranged experiment. Main effect factors were reimplant scheme [estradiol (E2) vs estradiol plus trenbolone acetate (E2 + TBA)] and time on feed (111, 125 or 139 days). The initial slaughter occurred when 65 to 70% of all steers were estimated to grade low Choice. No interactions occurred for any variable measured. Reimplanting 57 days after the initial implant with E2 + TBA increased overall daily gain 6.9% (P<.003) and feed efficiency 4.9% (P<.005). Feeding steers for an additional 14 or 28 days resulted in linear decreases in overall daily gain (P<.005) and feed efficiency (P<.0004). Reimplanting with E2 + TBA increased (P<.001) carcass weight but did not reduce marbling score or percent Choice carcasses. Feeding steers for an additional 14 or 28 days resulted in linear increases (P<.0001) in hot carcass weight, ribeye area, adjusted backfat (P<.004), and skeletal maturity (P<.0005). Additional days on feed increased dressing percentage (P<.002) and marbling score (P<.05) curvilinearly and tended (P=.25) to increase the percentage of carcasses grading Choice and Prime. Incidence of dark cutters was higher (P<.05) for E2 + TBA carcasses, and was very high at the first slaughter date (54 days after reimplantation). Although feeding for an additional 14 or 28 days can result in heavier live and carcass weights, higher dressing percentage, and increased marbling, poor efficiency of gain may create negative feeding margins.


A Comparison Of Beef Flavor Intensity Among Major Muscles, C.F. Carmack, J.R. Schwenke, Curtis L. Kastner, Michael E. Dikeman Jan 1992

A Comparison Of Beef Flavor Intensity Among Major Muscles, C.F. Carmack, J.R. Schwenke, Curtis L. Kastner, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Twelve muscles from eight Select/Choice grade steers were evaluated for beef flavor intensity, tenderness, and juiciness. Sample steaks were cut, and evaluation was performed by a five-member professional panel. The biceps femoris ranked highest in beef flavor intensity but was not different (P>.05) from the psoas major, gluteus medius, semimembranosus, and triceps brachii (scores of 7.8, 7.5, 7.4, 7.4, and 7.3, respectively). The rectus femoris, longissimus lumborum, serratus ventralis, infraspinatus, semitendinosus, deep pectoral, and supraspinatus were less intense in beef flavor (7.1, 7.1, 7.0, 6.8, 6.8, 6.7 ...


Variation In The Quality Of Forage Grazed By Pregnant/Lactating Beef Cows At Key Periods In The Year, E.S. Vanzant, R.C. Cochran, T.A. Stanley Jan 1992

Variation In The Quality Of Forage Grazed By Pregnant/Lactating Beef Cows At Key Periods In The Year, E.S. Vanzant, R.C. Cochran, T.A. Stanley

Kansas Agricultural Experiment Station Research Reports

Seven ruminal and esophageally fistulated crossbred beef cows were used to monitor changes in chemical composition of tallgrass-prairie forage selected during November of 1989 and January, March, June, and August of 1990. Quality of forage selected by beef cows was lowest during the period just before calving (cows calved in early February) but had begun to improve by the March sampling (postpartum period) and reached its peak during June sampling period (breeding season). Observed variability in the fiber and protein components of grazed forage highlights the dynamic nature of forage quality and emphasizes the importance of using such information when ...


Short-Run Impact Of Captive Supplies On Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder Jan 1992

Short-Run Impact Of Captive Supplies On Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Factors affecting western Kansas fed cattle prices during May through November 1990 were investigated. In particular, the impact of changes in captive cattle supplies on cash prices was examined. The term captive cattle supplies refers to cattle procured by a packer well in advance of slaughter. Captive supplies take one of three forms: 1) packer-owned cattle, 2) cattle procured on forward contracts, and 3) cattle procured under formula price (or marketing) agreements. Captive supplies were defined as cattle procured under forward contracts or formula price agreements, because data on packer-owned cattle were unavailable. Over the May through November 1990 period ...


Effect Of Long-Acting Penicillin And Levamisole® On Gain And Health Of Stressed Calves, F.K. Brazle Jan 1992

Effect Of Long-Acting Penicillin And Levamisole® On Gain And Health Of Stressed Calves, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to determine the effect of long-acting penicillin and/or levamisole injected at arrival or levamisole injected on day 1 and/or day 7 on the health and gain of newly received, highly stressed, light weight calves. Levamisole injected at arrival reduced (P<.05) sickness of newly arrived calves during the first 5 days. However, it did not reduce overall sickness during the receiving period. Long-acting penicillin injected at arrival did not reduce sickness, but did improve (P<.05) gain of calves during the growing period. The combination of levamisole and long-acting penicillin or the combination of levamisole on day 1 and day 7 did not reduce morbidity in these highly stressed calves.


Effect Of Feed Additives On Shipping Shrinkage Of Yearling Heifers, F.K. Brazle Jan 1992

Effect Of Feed Additives On Shipping Shrinkage Of Yearling Heifers, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to determine the effect of feed additives on the transit shrink of yearling cattle. In Trial I, 146 mixed-breed heifers were offered a mineral mixture containing either Terramycin® or Bovatec®, or without additive while grazing native grass pastures. Shrinkage after 300 miles in transit was lower (P<.09) for Bovatec-fed heifers than the other groups. In Trial II, 60 mixed-breed heifers were offered free choice prairie hay, plus soybean hulls without additive or containing either Aureomycin ®, Rumensin, or Bovatec®. Both ionophores tended to reduce live weight shrink following a 10-hour withholding of feed and water, but treatment differences were not significant (P>.05). The small shrinkage differences observed in these two trials would not justify changes in the weighing practices of feeder cattle.


Performance And Carcass Characteristics Of Cull Beef Cows Implanted With Growth Promotants And Fed A High Concentrate Ration, C.D. Cranwell, D.D. Simms, J.R. Brethour, John A. Unruh Jan 1992

Performance And Carcass Characteristics Of Cull Beef Cows Implanted With Growth Promotants And Fed A High Concentrate Ration, C.D. Cranwell, D.D. Simms, J.R. Brethour, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

Open, cull beef cows fed a high concentrate ration for 28 or 56 days and implanted with Finaplix-H®, Synovex-H®, or both had improved gain and feed efficiency compared to controls (nonimplanted cows). Changes in ultrasound-measured backfat (12th rib) of implanted cows and controls were similar in both feeding periods. Marbling, fat color, and tenderness, as measured by Warner-Bratzler shear force, were not improved by feeding cows for 56 days compared to 28 days. However, lean color, dressing percent, and ribeye area were improved by feeding for 56 days. Numerical yield grade was lower (P<.05) in 28-day fed cows. Implanting with Synovex-H or Finaplix-H resulted in leaner carcasses with lower yield grades compared to controls. Ribeye area was increased by using Synovex-H compared to controls and Finaplix- H. These data indicate that the benefits in gain, feed efficiency, and carcass traits from implanting cull cows can be obtained by using either Synovex-H or Finaplix-H alone.


Comparison Of Feedlot And Carcass Characteristics Of Angus, Hereford, Brahman, Charolais, And Gelbvieh Crossbred Steers, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman Jan 1992

Comparison Of Feedlot And Carcass Characteristics Of Angus, Hereford, Brahman, Charolais, And Gelbvieh Crossbred Steers, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Feedlot performance of 207 steers with various percentages of Angus, Hereford, Charolais, Brahman, and Gelbvieh breeding were compared at a constant 1) days fed, 2) adjusted carcass backfat, and 3) slaughter weight. As the percentage of Angus, Hereford, or Brahman increased, growth rate decreased, whereas increasing the percentage of Charolais increased growth rate. Increasing the percentage of Gelbvieh increased weaning weight but had little effect on post-weaning gains. Increasing percentage of Charolais increased feed conversion efficiency, whereas the other breeds were similar, except that at a constant slaughter weight, greater percentage of Hereford improved feed conversion efficiency. Increasing the percentage ...


Evaluation Of 20 Corn Hybrids For Silage Agronomic Characteristics, R.N. Sonon, B.S. Dalke, R. Suazo, L. Pfaff, K.K. Bolsen Jan 1992

Evaluation Of 20 Corn Hybrids For Silage Agronomic Characteristics, R.N. Sonon, B.S. Dalke, R. Suazo, L. Pfaff, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

Twenty corn hybrids were grown under irrigation and harvested at 90 % of the kernel milk line. Hybrid had a significant effect on plant height, whole-plant dry matter (DM) and DM yield, grain yield, stover yield, and plant part proportions. The highest whole-plant DM (45.9%) was for Cargill 7997, whereas the lowest was for Cargill 4327 (30.1%). Cargill 8427 and Pioneer 3245 had the highest wholeplant DM and grain yields, whereas Cargill 4327 was lowest. Grain yield and the percentage of grain in the whole-plant DM increased as the plant height increased.


Epiphytic Lactic Acid Bacteria Succession During The Pre-Ensiling And Ensiling Periods Of Alfalfa And Corn, Chunjian Lin, B.E. Brent, K.K. Bolsen, Daniel Y.C. Fung Jan 1992

Epiphytic Lactic Acid Bacteria Succession During The Pre-Ensiling And Ensiling Periods Of Alfalfa And Corn, Chunjian Lin, B.E. Brent, K.K. Bolsen, Daniel Y.C. Fung

Kansas Agricultural Experiment Station Research Reports

Twenty three species and 306 strains of epiphytic lactic acid bacteria (LAB) were found for two cuttings of alfalfa, each harvested at three stages of maturity, and three whole-plant corn hybrids. Epiphytic LAB counts were low and variable on the standing crops, particularly on alfalfa. Wilting increased LAB numbers slightly for alfalfa, but the chopping process increased counts dramatically for both crops. Lactobacillus plantarum, Pediococcus pentosaceus, Enterococcus faecium, and E. faecalis were predominant on both standing crops. The changes in LAB caused by wilting or chopping were mainly proportional changes in the four dominant species. Once the crops were ensiled ...


Effects Of Biomate® Inoculant And Dextrose On The Fermentation Of Alfalfa Silages, C. Lin, K.K. Bolsen, J.E. Bradford, B.E. Brent, A.M. Feyerherm, W.R. Aimutis Jan 1992

Effects Of Biomate® Inoculant And Dextrose On The Fermentation Of Alfalfa Silages, C. Lin, K.K. Bolsen, J.E. Bradford, B.E. Brent, A.M. Feyerherm, W.R. Aimutis

Kansas Agricultural Experiment Station Research Reports

This study documented once again that ensiling alfalfa is difficult and unpredictable. Adding 2% dextrose or Biomate® inoculant alone or in combination had little influence on the ensiling process but did improve fermentation efficiency somewhat. The pre-ensiling characteristics (i.e., dry matter (DM) and water soluble carbohydrate (WSC) values, buffering capacity, and epiphytic microflora) at the different cuttings and stages of maturity undoubtedly influenced the effectiveness of the two additives. Apparently, alfalfa often has too little WSC and too much buffering capacity to produce adequately preserved silage, especially when ensiled at a low DM content (less than 30 to 34%).


Interrelationship Between Copper And Bovine Health, Robert L. Larson, J.D. Arthington, L.R. Corah Jan 1992

Interrelationship Between Copper And Bovine Health, Robert L. Larson, J.D. Arthington, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Trace mineral nutrition is important to production efficiency and animal health. Trace mineral imbalances may be the roots of many diagnosed or undiagnosed problems in a herd. The low cost of a complete mineral analysis when compared to production losses encourages its use in the evaluation of any bovine herd in which trace mineral imbalances are suspected. A systematic gathering of information on mineral intake, antagonist intake, and serum and tissue values is necessary in order to make a diagnosis and a rational treatment decision. It is important to understand the complex interactions between minerals so that supplementation with one ...