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Kansas Agricultural Experiment Station Research Reports
Kansas Agricultural Experiment Station contribution; no. 88-363-S; Cattlemen's Day
Articles 1 - 30 of 48
Full-Text Articles in Life Sciences
Effect Of Hay Quality And Breed On The Onset Of Puberty And Subsequent Reproductive Performance In Beef Heifers, R.C. Perry, L.R. Corah, R.C. Cochran, J.R. Brethour
Effect Of Hay Quality And Breed On The Onset Of Puberty And Subsequent Reproductive Performance In Beef Heifers, R.C. Perry, L.R. Corah, R.C. Cochran, J.R. Brethour
Kansas Agricultural Experiment Station Research Reports
The effect of hay quality on the onset of puberty and subsequent reproductive performance was evaluated in 51 3/4 Hereford x 1/4 Angus (HA) heifers and 47 3/4 Hereford x 1/4 Brahman (HB) heifers. Two qualities of alfalfa hay were fed ad libitum. along with an average of 3.1 lbs/hd/day of ground sorghum grain. HB heifers were heavier and carrying more backfat and body condition (P<.05) at the start of the experiment and they maintained their weight advantage through out the experiment. A higher (P<.05) percent of the UB heifers reached puberty by 14 and 15 months of age and became pregnant during a 45 day artificial insemination breeding period. HA heifers reached puberty at a lighter (P<.05) average weight. Heifers fed high quality alfalfa hay were heavier (P<.05) by the start of the breeding season and were carrying more (P<.05) backfat and body condition. A higher percent (P=.08) of the heifers receiving higher quality hay reached puberty by 16 months of age and a higher (P=.10) percent became pregnant during the breeding period. Heifers inseminated at their pubertal estrus had lower (P=.04) first service conception rates than heifers inseminated at their second or later estruses (52% vs. 88%).
Limit Versus Full Creep For Calves Grazing Late Summer Bluestem, B. Cochran, Gerry L. Kuhl, T. Delcurto, L. Corah, E. Vanzant
Limit Versus Full Creep For Calves Grazing Late Summer Bluestem, B. Cochran, Gerry L. Kuhl, T. Delcurto, L. Corah, E. Vanzant
Kansas Agricultural Experiment Station Research Reports
Limit-feeding a soybean meal/milo creep supplement (1696 crude protein, average 3.096 salt) was compared with ad libitum consumption of the same supplement without salt or with no supplementation. Little difference was evident in average daily gain of calves among treatments. However, poor supplement consumption may have affected results.
Morning Versus Evening Supplementation For Heifers Grazing Winter Range, E. Vanzant, B. Cochran, L. Corah, K. Zoellner
Morning Versus Evening Supplementation For Heifers Grazing Winter Range, E. Vanzant, B. Cochran, L. Corah, K. Zoellner
Kansas Agricultural Experiment Station Research Reports
Supplementing developing heifers in the morning was compared with supplementation at sundown. No difference was evident among treatments in average daily gain, distance traveled, or time spent grazing.
Influence Of Supplemental Grain Type On Forage Utilization By Beef Steers Consuming Early Summer Bluestem, E.S. Vanzant, R.C. Cochran, A.A. Beharka, T.B. Avery
Influence Of Supplemental Grain Type On Forage Utilization By Beef Steers Consuming Early Summer Bluestem, E.S. Vanzant, R.C. Cochran, A.A. Beharka, T.B. Avery
Kansas Agricultural Experiment Station Research Reports
Supplementation of early summer bluestem with low levels of corn, wheat, or sorghum grain had no effect on forage intake, forage digestibility, or total dry matter digestibility in beef steers, compared with a regimen of no supplementation. Increased total dry matter intakes for the supplemented steers reflected supplement consumption.
Performance Of Stocker Heifers And Steers Grazing High Endophyte Fescue And Offered Oxytetracycline In A Mineral Mixture., K. Coffey, F. Brazle
Performance Of Stocker Heifers And Steers Grazing High Endophyte Fescue And Offered Oxytetracycline In A Mineral Mixture., K. Coffey, F. Brazle
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to evaluate the performance of stocker calves grazing high-endophyte fescue (68 to 70%) and offered oxytetracycline in a free-choice mineral supplement. In Experiment 1, 24 yearling crossbred heifers were utilized in a 112-day grazing study beginning on June 18. Performance of both control calves and those receiving oxytetracycline was extremely poor, making data interpretation difficult. Average oxytetracycline consumption was 327 mg per head, daily. Approximately 8296 of the total grazing time occurred during the daylight hours (6arn - l0pm) for both treatment groups. Heifers offered the medicated mineral mix grazed 20 minutes more than heifers offered …
Effect Of Medicated Mineral Mixtures And A Pinkeye Vaccine On The Gain And Health Of Steers Grazing Native Grass Pastures, F. Brazle
Kansas Agricultural Experiment Station Research Reports
Feeding supplements containing an antibiotic or ionophore improved stocker gains by .06 to .26 lb per head daily. A combination of Bovatec and Aureomycin in the mineral mixture improved (P<.08) steer gains over feeding Aureomycin alone. Mineral intake was higher than expected for the steers grazing burned, double-stocked) native grass pastures in 1987. Vaccinating steers with Piliguard at turn-out had no effect on pinkeye incidence and reduced stocker gains slightly.
Stocking Rate Effects On Intensive-Early Stocked Bluestem Range, R. Cochran, E.F. Smith, Clenton E. Owensby
Stocking Rate Effects On Intensive-Early Stocked Bluestem Range, R. Cochran, E.F. Smith, Clenton E. Owensby
Kansas Agricultural Experiment Station Research Reports
Based on a six-year study, stocking at 2.5x and 3.0x normal season-long rates for the first half of the growing season with no grazing during the latter half results in individual steer gains that are equal to those under the 2.0x rate. The gain per acre was greatly increased at the higher stocking rates. Grass remaining in early October was 20 percent lower on pastures stocked at the 2.5x and 3.0x rates than at the 2.0x rate. However, there was no trend toward further reductions over the study period. Botanical composition did not change greatly as a result of the …
Influence Of Ralgro® On Suckling Calf Performance On Tall Fescue Pastures With Various Levels Of Endophyte Infestation, F. Brazle, J. Whittier
Influence Of Ralgro® On Suckling Calf Performance On Tall Fescue Pastures With Various Levels Of Endophyte Infestation, F. Brazle, J. Whittier
Kansas Agricultural Experiment Station Research Reports
Four hundred and ten cow-calf pairs were allotted to tall fescue pastures containing 40, 45, or 70% endophyte fungus infestation. One half of the calves in each pasture were implanted with Ralgro® initially and reimplanted about 110 days later. Calf gains on the 70% endophyte fungus pasture showed a greater (P<.05) response to implanting than those grazing the 40 and 45% endophyte-infested tall fescue pastures during the 165 day trial.
Effect Of Depo-Mga On The Prevention Of Pregnancy In Grazing Heifers, L.R. Corah, F.K. Brazle, G.W. Boyd, T. Goehring
Effect Of Depo-Mga On The Prevention Of Pregnancy In Grazing Heifers, L.R. Corah, F.K. Brazle, G.W. Boyd, T. Goehring
Kansas Agricultural Experiment Station Research Reports
Two field trials were conducted to evaluate various dosage levels of Depo-MGA® for preventing pregnancy in grazing heifers. Injecting Depo-formulated MGA subcutaneously in the ear at dosages of 60, 90 or 120 mg effectively prevented pregnancy for up to 135 days. There was no effect on average daily gain.
The Effect Of Physical Characteristics On Cow Price Differentials In Kansas, F. Brazle, J. Mintert, Ted C. Schroeder, O. Grunewald
The Effect Of Physical Characteristics On Cow Price Differentials In Kansas, F. Brazle, J. Mintert, Ted C. Schroeder, O. Grunewald
Kansas Agricultural Experiment Station Research Reports
A survey of cow sales was conducted in the fall of 1986 and spring of 1987 at seven Kansas cattle auctions. Several factors significantly influenced cow prices, including health, estimated dressing percentage, lot size, breed, and time of sale. Changes in dressing percentage explained the major portion of cow price variation.
Kansas Custom Cattle Feeding Practices, Ted C. Schroeder, Gerry L. Kuhl
Kansas Custom Cattle Feeding Practices, Ted C. Schroeder, Gerry L. Kuhl
Kansas Agricultural Experiment Station Research Reports
A survey of Kansas custom cattle feedlots was conducted in the fall of 1987. This paper summarizes the survey and discusses some of the custom cattle feeding services and charges being offered.
Effect Of Limit-Fed, High Energy Growing Rations On The Performance Of Feedlot Steers, G. Goldy, B. Downey, K. Bolsen, Jack G. Riley
Effect Of Limit-Fed, High Energy Growing Rations On The Performance Of Feedlot Steers, G. Goldy, B. Downey, K. Bolsen, Jack G. Riley
Kansas Agricultural Experiment Station Research Reports
Steers red high-concentrate limit-fed rations were more efficient during growing than steers fed silage plus grain at 25% of their dry matter (DM) intake, or silage only. The limit-fed cattle also tended to gain faster (P<.10) and were more efficient (P<.05) during the finishing phase and did not have the expected depressed DM intakes compared to cattle fed the other growing-phase rations. Steers fed barely had lower DM intakes (P<.05) but gained more efficiently (P<.05) than those fed grain sorghum.
Experimental Induction And Monitoring Of Liver Abscesses In Cattle With Ultrasonography, K.F. Lechtenberg, T.B. Avery, Tiruvoor G. Nagaraja
Experimental Induction And Monitoring Of Liver Abscesses In Cattle With Ultrasonography, K.F. Lechtenberg, T.B. Avery, Tiruvoor G. Nagaraja
Kansas Agricultural Experiment Station Research Reports
We have demonstrated that ultrasonography can be used to visualize liver abscess in live cattle. We have also developed a nonsurgical method of catheterizing the bovine portal vein and experimentally inducing liver abscesses by inoculating the portal vein with Fusobacterium necrophorum bacteria.
Evaluating The Availability Of Nutrients For Maintenance And Growth In Ruminants, K. Gross, D. Harmon, T. Avery
Evaluating The Availability Of Nutrients For Maintenance And Growth In Ruminants, K. Gross, D. Harmon, T. Avery
Kansas Agricultural Experiment Station Research Reports
Two experiments were performed with mature wether lambs to evaluate availability of selected nutrients and volatile fatty acids for maintenance and growth. We used a technique in which known amounts of volatile fatty acids were infused into the rumen and casein into the abomasum. Sampling portal blood allowed measurement of nutrients absorbed across the gastrointestinal tract. Approximately 49, 62, and 21% of the infused acetate, propionate, and butyrate, respectively, were absorbed across the gastrointestinal tract.
Glucose, Starch, And Dextrin Utilization In The Small Intestine Of Steers, K.K. Kreikemeier, D.L. Harmon, T.B. Avery, Robert T. Brandt Jr.
Glucose, Starch, And Dextrin Utilization In The Small Intestine Of Steers, K.K. Kreikemeier, D.L. Harmon, T.B. Avery, Robert T. Brandt Jr.
Kansas Agricultural Experiment Station Research Reports
Glucose infused into the abomasum of Holstein steers resulted in higher arterial glucose concentrations and increased net glucose absorption than either starch or dextrin infusions. Increasing infusion rates above 20 g/hr for both starch and dextrin resulted in no further increases in net glucose absorption. Even though the enzymatic starch and dextrin hydrolysis became saturated above 25 g/hr, the amount of starch and dextrin disappearing in the small intestine increased with higher infusion rates. This was accompanied by increased volatile fatty acid concentrations in the ileal fluid with starch and dextrin infusions, but not when glucose was infused. These data …
Serum Cholesterol Concentrations In Yearling Bulls, G. Goldy, W. Olsen, Jack G. Riley
Serum Cholesterol Concentrations In Yearling Bulls, G. Goldy, W. Olsen, Jack G. Riley
Kansas Agricultural Experiment Station Research Reports
A wide range in serum cholesterol concentrations was observed within and between all four breeds of yearling bulls studied. The significance of this observation is unknown at this time. Addition research is necessary to determine the heritability of serum cholesterol, and the relationship between serum cholesterol of sires and the tissue cholesterol of their progeny.
Effect Of Grain Source And Brewer's Grain On The Performance And Serum Cholesterol Concentration Of Finishing Steers, G. Goldy, Jack G. Riley
Effect Of Grain Source And Brewer's Grain On The Performance And Serum Cholesterol Concentration Of Finishing Steers, G. Goldy, Jack G. Riley
Kansas Agricultural Experiment Station Research Reports
The inclusion of brewer's grains at 20% of the ration dry matter increased dry matter intake, resulting in poorer feed efficiency. Brewer's grain appeared to increase serum cholesterol. Serum cholesterol increased as days on feed increased, similar to other reported studies. Steers fed grain sorghum had greater dry matter intakes and poorer feed efficiencies than those fed barley or wheat. Analysis of tissue samples has not been completed at this time, which prohibits drawing any conclusions as to the effect on tissue cholesterol concentrations.
Effect Of Commercial Inoculants On Fermentation Of 1987 Silage Crops, K. Bolsen, A. Laytimi, R. Hart, L. Nuzback, F. Niroomand, L. Leipold, H Ilg
Effect Of Commercial Inoculants On Fermentation Of 1987 Silage Crops, K. Bolsen, A. Laytimi, R. Hart, L. Nuzback, F. Niroomand, L. Leipold, H Ilg
Kansas Agricultural Experiment Station Research Reports
Fourteen commercial silage inoculants were evaluated in 32 trials using nine different crop species harvested in 1987 and ensiled in PVC laboratory silos. Microorganism profiles of the crops showed high numbers of lactic acid bacteria (LAB) in all but one trial. Most inoculants supplied relatively high numbers of LAB per gram of crop--52 of the 66 inoculant samples supplied more than 10 (100,000) viable LAB per gram. The forage crops--wheat, bromegrass, sudangrass, and alfalfa--were highly responsive to the inoculants. When compared to untreated silages, treated silages had lower pH, acetic acid, ethanol, and ammonia-nitrogen values and higher lactic acid content. …
Inoculant-Treated Corn Silages For Growing Cattle, K. Bolsen, B. Kireh, A. Laytimi, J. Hoover, H. Ilg
Inoculant-Treated Corn Silages For Growing Cattle, K. Bolsen, B. Kireh, A. Laytimi, J. Hoover, H. Ilg
Kansas Agricultural Experiment Station Research Reports
Whole-plant corn silages were treated with Ecosyl® in one trial and Biomate4ll or Silagest® in a second trial. In both trials, the silages were well preserved and moderately stable in air during the feed-out period. Inoculated silages had slightly lower ensiling temperatures than control silages. Laboratory silo results indicated that all silages fermented extremely fast, but inoculated silages did have slightly lower pH and higher lactic acid values during the first 4 days post-filling. Calves fed inoculated silage rations tended to gain faster and more efficiently than those fed control silages. Gain per ton of crop ensiled also favored the …
Evaluation Of Interseeded Grain Sorghum And Soybeans As 8 Silage Crop, S.H.M. Esmail, K. Bolsen, S. Azimi, John E. Shirley
Evaluation Of Interseeded Grain Sorghum And Soybeans As 8 Silage Crop, S.H.M. Esmail, K. Bolsen, S. Azimi, John E. Shirley
Kansas Agricultural Experiment Station Research Reports
Interseeded grain sorghum and soybeans were harvested at late-boot, milk, and late-dough maturity stages of the sorghum (62, 77, and 91 days post-planting, respectively). Maximum dry matter yield occurred at the late-dough stage and interseeded silages had higher crude protein contents than the control, late-dough) grain sorghum silage. All silages underwent normal homolactic fermentations and were well preserved. Cellulose and acid detergent fiber contents were also higher in the mixtures than in the control silage, but fiber values decreased as maturity advanced. Digestibilities of most nutrients were similar in the rations, but when considered with chemical composition and yield data, …
Effect Of Environmental Temperature And Inoculants On The Fermentation Of Alfalfa And Forage Sorghum Silages, K. Bolsen, A. Laytimi, L. Nuzback, R. Hart
Effect Of Environmental Temperature And Inoculants On The Fermentation Of Alfalfa And Forage Sorghum Silages, K. Bolsen, A. Laytimi, L. Nuzback, R. Hart
Kansas Agricultural Experiment Station Research Reports
The inoculants, TriLac ®and Ecosyl® increased the rate and efficiency of the ensiling process in both high (50%) and low (32.5%) dry matter alfalfa, regardless of temperature. In both alfalfa trials, the inoculated silages had significantly lower pH, acetic acid, ethanol, and ammonia-nitrogen values and higher lactic acid values than their control counterparts. The inoculants worked equally well when fermentation was at 60 or 90 F. Although similar effects were obtained with forage sorghum, the differences were not as pronounced as those for the alfalfa silages.
Selecting Forage Sorghum Cultivars For Silage, J. White, K. Bolsen, B. Kirch, L. Pfaff
Selecting Forage Sorghum Cultivars For Silage, J. White, K. Bolsen, B. Kirch, L. Pfaff
Kansas Agricultural Experiment Station Research Reports
Eighty forage sorghum cultivars were compared in 1986 for agronomic and silage quality traits. Silage yield ranged from 5.3 to 10.0 tons (t) of dry matter (DM) per acre (mean, 7.4 t); grain yield, from 13 to 113 bushels (bu) per acre (mean, 66 bu). Percent lodging was extremely high, with a mean of 51% and only one cultivar free of lodging. Pre-ensiled DM content ranged from 22.2 to 35.4% (mean, 27.4%) and plant height from 85 to 180 inches (mean, 121 inches). Silage quality results showed that in vitro DM digestibility ranged from 44.6 to 62.1% (mean, 53%); crude …
Effect Of Cobactin On The Feedlot Performance And Carcass Traits Of Beef Steers, L. Corah, Ronald V. Pope
Effect Of Cobactin On The Feedlot Performance And Carcass Traits Of Beef Steers, L. Corah, Ronald V. Pope
Kansas Agricultural Experiment Station Research Reports
The addition of Cobactin to feedlot rations had no significant effect on average daily gain or feed efficiency, but did improve quality grade of steers fed for 110 days.
Relationship Between Agronomic And Silage Quality Traits Of Forage Sorghum Cultivars, J. White, K. Bolsen, B. Kirch
Relationship Between Agronomic And Silage Quality Traits Of Forage Sorghum Cultivars, J. White, K. Bolsen, B. Kirch
Kansas Agricultural Experiment Station Research Reports
Results from two trials evaluating 11 forage sorghums as silage crops indicated that silage quality traits of voluntary intake, digestibility, and crude protein content were linearly associated with the agronomic characteristics of days to half bloom and plant height. Intake was negatively associated with plant height (r = -.49); digestibility was negatively associated with days to half bloom (r = -.39) and plant height (r = -.49); and crude protein was negatively associated with days to half bloom (r = - .51) and plant height (r = -. 71). Within the same cultivar, but between years, voluntary intake varied by …
Evaluation Of Mga And Prostaglandin As An Estrous Synchronization Procedure Under Field Conditions, P.L. Houghton, L.R. Corah, T.B. Goehring
Evaluation Of Mga And Prostaglandin As An Estrous Synchronization Procedure Under Field Conditions, P.L. Houghton, L.R. Corah, T.B. Goehring
Kansas Agricultural Experiment Station Research Reports
When fed MGA (0.5 mg.hd/day) for 14 days, followed by a prostaglandin injection 17 days later, a total of 736 out of 1112 heifers at 11 locations expressed signs of estrus within 5 days following the PG injection for a 66.2% response to synchronization. Response rates between locations ranged from 33 to 95% (P<.05). In a comparison of prostaglandin forms at 5 locations, using 789 heifers, response to synchronization was similar (P=.66) between Lutalyse® (62.7% response) and Bovilene® (59.6% response). First-service conception rate was compared in 411 heifers at two locations and was higher for Lutalyse (68.996) than Bovilene (59.996) (P<.08). First-service conception rate varied by technician (P<.05) and ranged from 48.7 to 83.6%.
The Influence Of Stage Of Pregnancy On Digestion Characteristics In Beef Cows, A. Beharka, B. Cochran, D. Harmon, T. Avery
The Influence Of Stage Of Pregnancy On Digestion Characteristics In Beef Cows, A. Beharka, B. Cochran, D. Harmon, T. Avery
Kansas Agricultural Experiment Station Research Reports
Feed intake during the final trimester of gestation did not appear to vary significantly until 2 weeks before calving, after which it decreased dramatically. Measurements during two periods in the final trimester suggested that passage rate increased and digestibility decreased, as pregnancy proceeded.
Comparison Of Feedlot Performance Of Steer Calves Produced By Angus X Hereford And Brahman X Hereford Cows, J.R. Brethour, D. Patterson, K. Olson, L. Corah
Comparison Of Feedlot Performance Of Steer Calves Produced By Angus X Hereford And Brahman X Hereford Cows, J.R. Brethour, D. Patterson, K. Olson, L. Corah
Kansas Agricultural Experiment Station Research Reports
Steer calves that were 75 percent Hereford and either 25 percent Angus (BWF) or Brahman (BRX) were compared in a feedlot study that involved either high-concentrate or high-silage finishing rations. The BRX steers gained significantly faster, but there was no concomitant response in feed efficiency. The ration energy utilization by BRX steers appeared to be less than that of BWF steers. Performance of both breeds was poorer on the high-silage ration than on the high-grain ration, and there was no breed by ration interaction. A greater proportion of BWF calves graded USDA choice, but there was little difference between breeds …
Influence Of Limited-Creep Feeding On Pre And Postweaning Performance Of Spring Born Calves, P. Houghton, F. Brazle, Gerry L. Kuhl, B. Schalles, K. Zoellner
Influence Of Limited-Creep Feeding On Pre And Postweaning Performance Of Spring Born Calves, P. Houghton, F. Brazle, Gerry L. Kuhl, B. Schalles, K. Zoellner
Kansas Agricultural Experiment Station Research Reports
Two limited-creep feeding trials were conducted in Northwest and Southeast Kansas using spring-born, suckling calves to evaluate the effect of available forage supply on creep-fed calf performance. Energy vs. protein creep feeds were compared at each location. Creep feed intake was limited with salt to achieve an average daily intake of about 1.5 lb per head. Calves consuming the limited energy and protein creep feeds gained from 0.1 to 0.6 lb more per head daily preweaning, and required 2.3 to 7.6 lb of creep per lb of extra weaning weight. Postweaning gains of the noncreep-fed calves were .12 to .27 …
Influence Of Supplemental Protein Concentration On The Performance Of Beef Cows Grazing Dormant Bluestem Range, T. Delcurto, B. Cochran, L. Corah
Influence Of Supplemental Protein Concentration On The Performance Of Beef Cows Grazing Dormant Bluestem Range, T. Delcurto, B. Cochran, L. Corah
Kansas Agricultural Experiment Station Research Reports
Three milo/soybean meal mixtures representing three supplemental crude protein concentrations (13, 26, and 39%) were evaluated in terms of pregnant beef cow performance. Cow weight and body condition changes responded in a linear fashion to increasing protein. Cattle fed the high protein (39% Crude Protein) supplement lost the least weight and body condition, whereas cattle supplemented with the low protein treatment lost the most. Although there was little difference between treatment groups in terms of reproductive efficiency and subsequent calf performance, moderate (26% Crude Protein) and high protein supplements appear to offer the most benefit in maintaining cow\weight and body …
Effect Of Limited - Creep Feeding On Performance Of Spring-Born Calves, D. Simms, Gerry L. Kuhl
Effect Of Limited - Creep Feeding On Performance Of Spring-Born Calves, D. Simms, Gerry L. Kuhl
Kansas Agricultural Experiment Station Research Reports
Three limited-creep feeding trials were conducted with spring-born suckling calves on native grass. The 1696 crude protein, high energy creep feed containing Bovatec® was fed from mid-August to weaning in mid-October. Limited-creep feeding increased (P<.05) calf gains .19 lb per/head/daily with an average daily consumption of 2.15 lb, giving a creep feed-to-gain conversion rate of 11.2.