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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
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 Long-Acting Penicillin And Levamisole® On Gain And Health Of Stressed Calves, F.K. Brazle
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.
Losses From Top Spoilage In Corn And Forage Sorghum Silages In Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin
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- …
Effect Of Deworming With Ivomec® On Reproductive Performance Of Yearling Beef Heifers, Robert L. Larson, L.R. Corah, M.F. Spire, R.C. Cochran
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 …
Production And Marketing Factors Influencing Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder
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. …
Losses From Top Spoilage In Horizontal Silos In Western Kansas, J.T. Dickerson, G. Ashbell, K.K. Bolsen, B.E. Brent, L. Pfaff, Y. Niwa
Losses From Top Spoilage In Horizontal Silos In Western Kansas, J.T. Dickerson, G. Ashbell, K.K. Bolsen, B.E. Brent, L. Pfaff, Y. Niwa
Kansas Agricultural Experiment Station Research Reports
The top 3 ft. of silage from each of 30 horizontal silos in western Kansas was sampled at three locations across the width of the silo for 2 consecutive years (1990 and 1991). Ninety-five percent of the silages were either corn or forage sorghum, and only 22 percent of the silos were sealed with polyethylene sheeting. Losses of organic matter (OM) from spoilage were estimated by using ash content as an internal marker. Sealing silos dramatically reduced the estimated spoilage losses in the top 3 ft. All silages had greater estimated spoilage losses in the top 18 in. in 1991 …
Effect Of 1174® Silage Inoculant On The Fermentation Of Corn Silages, K.K. Bolsen, C. Lin, B.E. Brent, J.E. Bradford, A.M. Feyerherm
Effect Of 1174® Silage Inoculant On The Fermentation Of Corn Silages, K.K. Bolsen, C. Lin, B.E. Brent, J.E. Bradford, A.M. Feyerherm
Kansas Agricultural Experiment Station Research Reports
The effect of 1174® Silage Inoculant on the ensiling process was studied using three Pioneer corn hybrids. All hybrids fermented rapidly, and 1174 did not significantly influence any of the fermentation characteristics during the 120 days. The epiphytic lactic acid bacteria (LAB) counts on the chopped corn plants were high; 14 times greater than the numbers of LAB provided by the inoculant. Although during fermentation, statistically significant differences occurred among the hybrids for fermentation end-products, no observed trends suggested that hybrid effects were real.
Performance Of Rat-Tail Calves, R.R. Schalles, Douglas A. Powell, L.V. Cundiff, J.B. Glaze
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, …
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
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.
Beef Empire Carcass Merit Days Index System, T.H. Powell, S.D. Laudert, R.W. Lee, G. Seibert, John A. Unruh, Michael E. Dikeman
Beef Empire Carcass Merit Days Index System, T.H. Powell, S.D. Laudert, R.W. Lee, G. Seibert, John A. Unruh, Michael E. Dikeman
Kansas Agricultural Experiment Station Research Reports
Kansas State University, in cooperation with the Beef Empire Days committee, developed a new beef carcass index system for 1991, incorporating yield and quality traits as indicators of carcass merit. Development of the system considered current industry and consumer demands in a critical evaluation of final carcass ranking. The index starts from 100 points and applies positive and negative adjustments for hot carcass weight; ribeye area; adjusted 12th rib fat thickness; percent kidney, pelvic, and heart fat; and quality grade. The index was first used in 1991.
Record-Keeping Systems For Beef Safety And Feedlot Health, C.D. Cranwell, D.D. Simms
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 pharmaceutical inventory …
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
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 …
Influence Of Level Of Supplemental Alfalfa Hay On The Performance Of Beef Cows Grazing Winter Bluestem Range, E.S. Vanzant, R.C. Cochran
Influence Of Level Of Supplemental Alfalfa Hay On The Performance Of Beef Cows Grazing Winter Bluestem Range, E.S. Vanzant, R.C. Cochran
Kansas Agricultural Experiment Station Research Reports
One hundred thirteen pregnant Hereford x Angus cows were used to study the effect of increasing levels of supplemental alfalfa hay on performance when grazing winter bluestem range. Although no differences were observed in reproductive performance, increasing the amount supplemental alfalfa from approximately .5% up to 1.0% of body weight resulted in increased weight gain and reduced condition loss in cows and increased weaning weight in calves. However, time spent grazing was significantly decreased in those groups receiving larger amounts of supplemental alfalfa.
Short-Run Impact Of Captive Supplies On Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder
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 …
Influence Of Frequency Of Energy Supplementation On Utilization Of Early-Summer, Tallgrass Prairie Forage, J.L. Beaty, R.C. Cochran, B.A. Lintzenich, E.S. Vanzant
Influence Of Frequency Of Energy Supplementation On Utilization Of Early-Summer, Tallgrass Prairie Forage, J.L. Beaty, R.C. Cochran, B.A. Lintzenich, E.S. Vanzant
Kansas Agricultural Experiment Station Research Reports
Fifteen ruminally cannulated beef steers were used in a pasture supplementation experiment to determine the effects of frequency of energy supplementation on intake and digestion of tallgrass prairie forage during early to mid-summer. Steers grazed a common pasture and were assigned to the following treatments: no supplement (control); 4 lb rolled sorghum grain/head/day; 9.3 lb grain/head/3 times weekly. Steers in the two supplemented groups consumed the same amount of sorghum grain/head/week. In general, supplementation was not harmful (P =.17) to forage intake. However, providing supplement 3 times weekly tended (P =.11) to depress forage intake compared with daily supplementation. Although …
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
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 cattle. …
Evaluation Of Inoculant And Npn Silage Additives: A Summary Of 26 Trials And 65 Farm-Scale Silages, K.K. Bolsen, R.N. Sonon, B. Dalke, Ronald V. Pope, Jack G. Riley, A. Laytimi
Evaluation Of Inoculant And Npn Silage Additives: A Summary Of 26 Trials And 65 Farm-Scale Silages, K.K. Bolsen, R.N. Sonon, B. Dalke, Ronald V. Pope, Jack G. Riley, A. Laytimi
Kansas Agricultural Experiment Station Research Reports
Results from 26 trials comparing fermentation, dry matter (DM) recovery, and effects on cattle performance of inoculated or nonprotein nitrogen (NPN)-treated silages vs. controls were summarized using paired t-test analysis. Inoculants consistently improved fermentation efficiency, DM recovery, feed conversion, and gain per ton of crop ensiled in both corn and forage sorghum silages. The use of NPN, particularly urea or anhydrous ammonia, adversely affected fermentation efficiency, DM recovery, avg daily gain, and gain per ton of crop ensiled, particularly for the higher moisture forage sorghums.
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
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 …
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
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%).
Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, L.H. Harbers, K.K. Bolsen, H. Hartadi
Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, L.H. Harbers, K.K. Bolsen, H. Hartadi
Kansas Agricultural Experiment Station Research Reports
Dry matter yield of grain sorghum alone averaged more than 1.0 ton per acre higher than that of intercropped grain sorghum-soybeans in both 1988 and 1989. All silage yields were lower in 1989 because of drought. Grain sorghum silage had less NDF and ADF, but intercropped silages had over 4 percentage units more crude protein. Digestibility coefficients for crude protein, NDF, and ADF tended to favor intercropped silages, but yearling steer performance favored grain sorghum silage. Studies over 4 years (1986 to 1989) suggest that intercropping might be more beneficial for dairy cattle producers than beef producers.
Effects Of Source And Level Of Energy Or Protein Supplementation On Nitrate Toxicity In Cattle, M.W. Smith, M.R. Blanding, L.R. Corah, Dale A. Blasi
Effects Of Source And Level Of Energy Or Protein Supplementation On Nitrate Toxicity In Cattle, M.W. Smith, M.R. Blanding, L.R. Corah, Dale A. Blasi
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to investigate whether level or source of energy and protein supplementation would reduce the incidence or severity of clinical toxicity in cattle fed forages high in nitrate (NO3). Heavily fertilized sudan hay with 40,000 to 50,000 ppm NO3 was fed in both experiments. The percentage of total blood hemoglobin converted to methemoglobin by nitrate was used to compare treatment effectiveness. Energy supplementation at levels tested in Exp. 1 had no effect on methemoglobin concentration. In Exp. 2, all protein sources (wheat midds, urea, soybean meal) reduced the maximum methemoglobin levels and increased the rate of reconversion …
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
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, …
Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope
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.
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
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 Fat And Monensin Levels On Performance Of Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope
Influence Of Fat And Monensin Levels On Performance Of Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope
Kansas Agricultural Experiment Station Research Reports
To evaluate effects and potential interaction of supplemental fat (0 to 4% tallow) and monensin (0, 20, 40 g/ton) in a corn-based finishing diet, 96 Continental crossbred steers (860 lb) were used in a 2x3 factorially arranged randomized complete block design. Consumption by steers fed the 0% fat diet decreased linearly (P<.0001) with increased monensin level, whereas consumption by steers fed 4% fat diets decreased curvilinearly (P<.08), indicating that monensin depressed intake much less when the diet contained fat. Daily gain decreased linearly (P<.02) with increased monensin level for steers fed no supplemental fat, but remained constant in steers fed 4% fat. Feed efficiency was improved (P<.025) by 4% fat across levels of monensin. This study provides further evidence of interactions between monensin and supplemental fat in effects on animal performance.
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
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.
The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah
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 herd …
Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin System: I. Effect On Inducement Of Puberty And Conception Rates, L.R. Corah, J.R. Yaeger, J.C. Whittier, J.C. Meiske, D.J. Patterson, K. C. Olson
Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin System: I. Effect On Inducement Of Puberty And Conception Rates, L.R. Corah, J.R. Yaeger, J.C. Whittier, J.C. Meiske, D.J. Patterson, K. C. Olson
Kansas Agricultural Experiment Station Research Reports
We evaluated the estrous response and fertility of yearling beef heifers after treatment with melengestrol acetate (MGA) and prostaglandin F2" (PG). The 304 heifers, at three locations, were allotted to two treatments: nonsynchronized controls and those receiving .5 mg MGA per head daily for 14 days followed by a 25 mg PG injection 17 days after the end of MGA feeding (MGA/PG). Heifers in the control and MGA/PG groups were artificially inseminated 12 hours after observed estrus for 21 days or 6 days after PG, respectively. Conception rate at first service and overall pregnancy rate did not differ (P>.10) …
Comparison Of Feeding Calves Vs. Yearlings, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman
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 Castration Method On Stocker Health And Gain, F.K. Brazle
Effect Of Castration Method On Stocker Health And Gain, F.K. Brazle
Kansas Agricultural Experiment Station Research Reports
Two field trials were conducted to compare two different band-castration techniques with surgical castration of calves and yearlings. In Trial I, the bull calves were surgically castrated or banded with Elastrator® rubber rings and compared with calves purchased as steers. Purchased steers gained faster (P<.05) during the 33-day receiving trial than bulls castrated by either method, but no difference was observed in percentage of sick calves. In Trial II, yearling bulls were surgically castrated or banded with the EZE® Bloodless Castrator device. Yearlings purchased as steers gained faster (P<.05) than EZE-castrated bulls during the 110-day trial. Bulls castrated by either method required more medications (P<.07) than steers. In both trials, there was no advantage to banding compared with surgical castration of bulls in terms of gain or health.