Cattlemen's Day, 1982

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https://hdl.handle.net/2097/6637

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Open Access
Kansas survey: What do commercial cow-calf producers consider when buying herd sires?
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Bolze, R.; Lambert, C.; O'Neill, S.; Corah, L.
Recently, Kansas State University surveyed the factors a commercial cowman considers when he buys Angus, Simmental, or Hereford bulls. A mail survey of the customers of 29 purebred breeders of those three breeds was conducted. We attempted to include a reasonable cross section of both performance and show-ring-oriented breeders. A total of 1,447 survey forms were distributed and 613 (42%) were returned.
Open Access
Natural mating of estrus-synchronized heifers and indicators of bull fertility
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Pruitt, R.J.; Corah, L.R.; Simms, D.D.; Spire, M.F.
In six trials involving 486 heifers and 23 bulls, we studied factors affecting pregnancy rates of estrus-synchronized heifers mated naturally and evaluated indicators of bull fertility. Heavier heifers and those in fleshier condition had a higher response to estrus synchronization with Lutalyse. Heifers serviced more than once did not have higher pregnancy rates. Pregnancy rates achieved by bulls ejaculating up to 32 times in 2 1/2 days decreased only slightly as the number of ejaculations increased. There was considerable variation in pregnancy rates and the number of ejaculations achieved by individual bulls. Sex drive measured by a 3D-minute serving-capacity test was positively correlated with the number of ejaculations during the mating period and the number of heifers pregnant per bull. None of the variables studied could adequately explain the wide variation in pregnancy rates attributed to individual bulls.
Open Access
Effect of 48-hour calf removal
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Simms, D.D.; Odde, Kenneth G.; Corah, L.R.; kenodde
In three field trials, we removed calves from 187 beef cows for 48 hours at the beginning of the breeding season to determine the effect on the cows' cycling activity, conception rate, and pregnancy rate. When calves were removed, the cows were injected with Lutalyse. Removing calves for 48 hours did not change weight gain or sickness incidence of calves, but neither did it facilitate the cows' rebreeding.
Open Access
Effect of Lasalocid on performance of grazing steers
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Corah, L.R.; Riley, Jack G.; Pope, Ronald V.; rvpope
Steers fed 200 mg of Lasalocid per day while grazing bromegrass pasture gained 7.6% faster than non-medicated controls; however, this difference was not statistically significant.
Open Access
Effect of Bovatec on grazing steer performance
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Lomas, Lyle W.; llomas
Steers fed 100 mg or 200 mg of Bovatec per head daily while grazing bromegrass gained 16.4% and 23.9% faster, respectively, during 112 days of grazing than did controls.
Open Access
Effect of Bovatec and Ralgro implants on finishing steer performance
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Lomas, Lyle W.; llomas
Cattle fed Bovatec consumed 17.4% less feed and were 17.7% more efficient than controls, with no effect on gain. Ralgro implants improved gain 12% and feed efficiency 6.9%, with no effect on feed intake. Bovatec and Ralgro combined had an additive effect on feed efficiency.
Open Access
Reproduction and production of heifers implanted with Ralgro before weaning
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Simms, D.D.; Schwartz, F.L.; Corah, L.R.
Over a 3-year period (1976-1978), heifer calves either were not implanted or were implanted between 2 and 5 months of age. In 1977, the study also included heifers implanted at birth. Implanting at birth increased the percentage of heifers open as yearlings. More implanted heifers tended to be open as 2- to 5-year-olds than control heifers, but the differences were not statistically significant. Implanting of the heifers had no effect on weight gains of their calves.
Open Access
Feeding Rumensin to yearling heifers on late-summer grass
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Jensen, M.; Held, R.; Smith, E.F.; Riley, Jack G.
Rumensin was self-fed in a loose salt mixture to yearling heifers on late-summer bluestem pasture (August to November). They ate 0.036 lbs. of salt mixture (124 mg of Rumensin) daily, but performance did not improve.
Open Access
Effect of Ralgro and Compudose on grazing steer performance
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Lomas, Lyle W.; llomas
COMPUDOSE (an estradiol removable implant) increased steer gains during 202 days of grazing by 11.4%. Ralgro implants (once at the beginning of the study) increased gain 8.5%. Steer performance on the two implants was statistically similar.
Open Access
Insecticide-impregnated ear tags for range cattle
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Lynch, G.L.; Zoellner, K.O.; Broce, A.B.; Riley, Jack G.
When both cows and calves were double-tagged (one tag per ear) with ear tags impregnated with fenvalerate (Ectrin) or permethrin (Atroban), the calves gained faster (P<.01) than when neither cows nor calves were tagged. Double-tagged yearling heifers gained faster (P<.05) than did heifers without tags. When all cows had been double-tagged, tagging the calves did not increase calf weight gain.
Open Access
Effects of Rumensin or Rumensin-Tylan combination on steer performance and liver abscess control
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Riley, Jack G.; Pope, Ronald V.; rvpope
Combining Tylan with Rumensin dramatically reduced abscessed liver incidence, compared with that of steers fed a non-medicated control ration or Rumensin without Tylan. Only one steer out of 50 on the Rumensin plus Tylan combination had an abscessed liver, whereas livers from 16 of the control steers and 27 on Rumensin were condemned. There were no significant differences in daily gain among treatments; however, Rumensin plus Tylan improved feed efficiency by 9.4% compared with that of the control. Rumensin alone improved efficiency by 6%.
Open Access
Effect of Rumensin on legume bloat in cattle
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Katz, M.P.; Bartley, E.E.; Pressman, E.S.; Nagaraja, Tiruvoor G.; tnagaraj
Rumensin with or without Bloatguard was fed to rumen-fistulated cattle grazing lush alfalfa pasture. Although Rumensin alone or in combination with low doses of Bloatguard reduced bloat, it was not completely effective. Hence, Bloatguard at the recommended dose is still necessary for full bloat control.
Open Access
Using sprinklers to improve performance of heat-stressed feedlot cattle
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Ames, D.R.; Robinson, J.B.; Nichols, David A.; dnichols
During a 56-day test, four pens of finishing cattle were sprinkled when dry-bulb temperatures exceeded 80 F. The performance of the cattle was compared with that of cattle in pens not sprinkled. Cattle in sprinkled pens gained faster (2.83 vs 2.44 lbs per day, P<.05) and more efficiently (4.45 vs 5.20 lbs feed per lb gain) than did those in the nonsprinkled. Feed intakes of all cattle were similar.
Open Access
Estrus synchronization of cattle in Kansas
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Simms, D.D.; Sprott, L.R.; Odde, Kenneth G.; Corah, L.R.; kenodde
In 22 field trials involving 1,692 cattle, we evaluated Lutalyse as an estrus-synchronization agent for both natural mating and artificial insemination. Only 52.7% of the females in all 22 trials were cycling at the start of the breeding season. Both body condition and days postpartum at the start of the breeding season influenced the response to Lutalyse. First-service pregnancy rate in the 2 or 3 days of synchronization was 38.4% for all 453 females bred artificially in 12 trials in northwestern Kansas. The rate was 59%, however, if only females observed to be in heat were counted; but only 24.5% if only those in which no heat was observed were counted.
Open Access
Ruminal effects of Rumensin during cold stress
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Robinson, J.B.; Ames, D.R.; Nichols, David A.; dnichols
Two trials were conducted to determine the effects of Rumensin in cold-stressed cattle. Steers fed diets with and without Rumensin were exposed to cold stress (0 C) and thermoneutrality (20 C). Rumen volatile fatty acids and rumen vault gases were sampled to monitor rumen fermentation. Although not statistically significant, Rumensin decreased rumen acetate to propionate ratios and increased CO2/CH4 ratios in both thermal environments. Such a methane decease should improve feed efficiency because less energy is wasted. Thus, Rumensin appears to support a more efficient rumen fermentation in cold stress as well as thermoneutrality.
Open Access
The effect of Avoparcin on the performance of grazing steers
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Corah, L.R.; Busby, W.D.; Riley, Jack G.
One hundred two steers were used to study the effect of Avoparcin on the performance of grazing steers. Four desired dosages -- 0. 200, 400. and 600 mg/head/day -- were compared in a self-fed mineral mix. Feeding Avoparcin at the desired level of 400 mg/head/day increased steer gains By 22%.
Open Access
Trials on commercial silage additives
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Bolsen, K.
Numerous commercial silage additives, manufacturers of which make various claims for their improving silage quality, are available to Kansas farmers and ranchers. In 2 previous years (1980 and 1981), we reported on nine trials involving six additives (Progress Reports 377 and 394). Each additive improved the silage in at least one of the four criteria we evaluated: 1) ensiling temperature, 2) dry matter recovery, 3) feeding value, and 4) aerobic stability. Two more trials with additives are reported on in this Progress Report (pages 6 and 11 ).
Open Access
Whole sorghum grain stillage for beef cattle
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Soderlund, S.; Bolsen, K.; Brent, B.; Pope, Ronald V.; Riley, Jack G.; rvpope
Trials were conducted to evaluate the storing, handling, and feeding of whole sorghum grain stillage from a farm-scale still. Stillage varied in dry matter among batches and had to be agitated to keep solids suspended. Whole stillage kept for 10 days to 2 weeks, even during warm weather, with mold growth occurring only on the surface. However, when stillage was mixed with either grain or forage, it spoiled rapidly and required close bunk management. Although whole stillage was still palatable to cattle after 2 weeks, intakes were best when it was less than 3 days old. When whole stillage was fed freechoice, cattle could not consume enough dry matter to maintain weight. Steers fed whole stillage at 50% (as-fed basis) of a growing ration consumed more dry matter, gained faster, and were more efficient than those fed 0, 32, or 68% stillage. Feeding decanted stillage (10.5% dry matter) as a protein supplement in finishing rations gave poorer rate and efficiency of gains than did soybean meal or urea.
Open Access
Inoculant and urea-molasses additives for forage sorghum silage
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Hinds, M.; Brethour, J.; Bolsen, K.; Ilg, H.
An inoculant (Sila-bac) and a non-protein nitrogen (LSA-100) silage additive were evaluated with whole-plant, forage sorghum silage. Sila-bac silage had the fastest temperature rise and peaked at 10 C above its initial temperature. LSA-100 silage had a slow, steady temperature rise and reached a maximum of 22 C above its initial. Control silage peaked at 15 C above its initial. Steers fed LSA-100 silage gained 7 to 9% faster than did those fed control or Sila-bac silages. LSA-100 silage was consumed in greatest amount; Sila-bac silage, in the least. The two additives improved feed efficiency by 3% over the control. Both additives improved aerobic stability; control silage heated after 3 days; Sila-bac and LSA-100 after 7. Dry matter recovery from the stave silos was similar for control (78.1%) and LSA-100 silages (77.3%), but higher for Sila-bac silage (81.2%). When fermentation, storage, and feedout losses were combined with steer performance, pounds of gain per ton of ensiled forage were 88.8 for Sila-bac, 84.5 for LSA-100, and 82.6 for control silages.
Open Access
Stocking rate and supplementation for steers grazing intensively on early-stocked bluestem pasture
(Kansas State University. Agricultural Experiment Station, 2011-01-27) Held, R.; Smith, E.F.; Riley, Jack G.; Owensby, Clenton E.; owensby
Native bluestem pastures were grazed by 520-lb steers from April 30 to July 14 at stocking rates of 1.7, 1.3 and 1.1 acres per steer. Daily gain of the steers was about the same for the two heavier stocking rates, but was slightly lower for the lightest rate (1.7 acres/steer). The gain per acre increased with each increase in stocking rate. Half of the steers were self-fed a salt-limited sorghum grain-rumensin mixture. Each steer consuming approximately 1.5 pounds per day of this mixture gained about a half a pound more per day (P<.05) than did each steer not fed the supplement (1.77 vs 1.27 lbs.). Gain per acre was increased by 33 lbs. with the supplementation.