Cattlemen's Day, 1977

Permanent URI for this collectionhttps://hdl.handle.net/2097/6642

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Open Access
Animal performance changes related to time on feed
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Chestnut, A.; Brent, B.E.
We are developing mathematical models to show how feed intake, rate of gain, and feed efficiency change during the finishing period. When finished, the models might be used to predict when to sell cattle to maximize profit or minimize loss, to plan feed inventories, or to predict when animals have reached a desired grade.
Open Access
Value of sprinkling feedlot cattle during heat
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Ames, D.R.; Willms, C.
Four lots of growing-finishing cattle were sprinkled when dry bulb temperature exceeded 80 F the summer of 1976 and compared with lots not sprinkled. Sprinkled lots gained significantly (P<.01) more (1.20 kg per day compared with 1.04) (2.64 vs. 2.29 lbs.) than controls. Sprinkling also improved feed efficiency (F/G).
Open Access
Protein adjustments in heat stressed finishing cattle
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Ames, D.R.; Willms, C.L.
A summer feedlot trial indicates that protein can be removed from finishing rations in proportion to magnitude of heat stress without causing a decline in average daily lain. Cattle consumed .13 kg/hd/day (.30 lb) less supplemental protein soybean oil meal) during the 82-day period with no decline in average daily gain when compared to controls.
Open Access
Operational procedures of Kansas feedyards
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Koons, L.; Riley, Jack G.
Twenty-four Kansas feedyards with 432,000 head capacity participated in a survey on operation procedures. The survey covered five areas: processing, animal health, rations, facilities, and marketing. Methods differed most in processing and starter-ration ingredients.
Open Access
Effect of Monensin on performance of finishing steers
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Tobyne, D.; Fink, G.; Riley, Jack G.
We used 72 Hereford and Hereford x Angus cross yearling steers to further evaluate 200 mg Monensin (trade name Rumensin) per head daily. Monensin improved gain 6.7% and significantly improved efficiency, 12.3%.
Open Access
Sources of roughage and milo for finishing steers
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Bolsen, K.; Riley, Jack G.
Steers fed corn silage gained significantly (P<.05) faster than steers fed any other roughage. Wheat silage ranked second with gains significantly (P<.05) more than gains from milo stover silage, alfalfa hay or corn silage-alfalfa hay combination. Corn silage also produced the most efficient gains, which were significantly (P<.05) more efficient than gains from milo stover silage. Feeding 100% of the grain portion of finishing ratinos as high moisture milo resulted in 13% faster (P<.05) and 13% more efficient (P<.05) gains than feeding equal parts of high moisture milo and dry rolled milo.
Open Access
Micronized corn and urea-liquid supplements in growing rations for calves
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Bolsen, K.; Chyba, Leslie J.; Ibbetson, W.
In growing rations containing fescue hay, micronized corn + urea-liquid gave: (1) 20.5% faster gains and 11.5% more efficient gains than cracked corn + urea-liquid and (2) similar rate and efficiency of gains as cracked corn + soybean meal.
Open Access
Micronized milo, urea and prairie hay for growing beef heifers
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Bolsen, K.; Oltjen, J.; Riley, Jack G.
Twenty-four individually fed heifers were used 1n two heifer trials to evaluate four combinations of micronized or dry-rolled milo and soybean meal or urea supplements 1n prairie hay growing rations. Feeding 4 to 5 lbs. of micronized milo produced an average of 17% faster and 16% more efficient gains than feeding 4 to 5 lbs. of dry-rolled milo.
Open Access
Testosterone-treated cows to aid in heat detection
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Laaser, G.N.; Kiracofe, G.H.
Eight cull Hereford cows were given 200-mg. injections of testosterone proprionate repository (Haver-Lockhart, Shawnee, KS) every other day for 20 days (10 injections). Four cows were given weekly booster injections with the same testosterone proprionate; the other four were injected every three weeks with testosterone enanthate (sigma Chemical Co., St. Lois, MO.). Each cow was equipped with a chin-ball marker and each was used to detect heat in other cows. The detection period lasted approximately 45 days. Testosterone-treated cows served satisfactorily as heat detectors; those given boosters of testosterone proprionate marked more cows in heat than those given testosterone enanthate.
Open Access
In vitro digestibility of Flint Hill rangeland forages
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Umoh, J.E.; Harbers, L.H.; Smith, E.F.; Whitney, J.; Boggs, Don
We used an in vitro digestibility technique to determine the nutritive value of predominately native bluestem forage on burned and nonburned Flint Hills pastures. We also collected forage samples via esophageal fistulas to get what the animals consumed while grazing selectively. Summary Dry matter (DM) digestibilities for 11 months by both techniques followed changes in climatic conditions. The lowest DM digestibility averaged about 65% in October, 1975, and June, 1976; the highest (about 80%) was between February and March 1976. The grass selected by animals was usually more digestible than that harvested by hand. However, in vitro digestibility of the extrusa may be higher than actual digestibility in the animals when both solid and liquid fractions of the extrusa are collected.
Open Access
Milo stover, forage sorghum and alfalfa silages for growing heifers
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Bolsen, K.; Riley, Jack G.; Grimes, C.
Ninety heifer calves were used to compare six rations containing various combinations of milo stover, forage sorghum and alfalfa silages. In the 96-day trial, heifers fed 100% forage sorghum silage outperformed heifers fed 100% milo stover silage. Adding forage sorghum or alfalfa silage to the 100% milo stover silage ration improved rate and efficiency of gain. Observed gains and efficiencies for the 67% milo stover + 33% forage sorghum and for the 33% milo stover + 67% forage sorghum silage rations exceeded predicted gains and efficiencies an average of 10.7% and 11.5%, respectively.
Open Access
A new tool for evaluating forages
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Harbers, L.H.; Brazle, F.K.; Owensby, Clenton E.; owensby
The scanning electron microscope has been used to observe the digestion of alfalfa hay and warm- and cool-season grasses. Photomicrographs show that leaves of all species are digested by bacteria and protozoa attacking either the upper part of the leaf or exposed edges; lower leaf surfaces are never attacked. Intake of a forage depends on how rapidly rumen bacteria and protozoa can enter the upper leaf surface and digest underlying material (mesophyll) leaving most of the highly lignified nutrient-carrying vessels (vascular tissue) undigested.
Open Access
Large-package and ensiled milo stover for maintaining pregnant cows
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Kimple, K.; McKee, M.; Fink, G.
One hundred-two mature Simmental and Hereford cows in mid to late gestation were used to compare three maintenance rations during an 83-day trial: (1) milo stover silage, (2) large package milo stover (stacks and bales), and (3) forage sorghum silage. Each breed was represented by a pen of 17 cows in each of the forage groups. Cows fed forage sorghum silage gained significantly more than cows on other rations. Cows receiving milo stover silage lost heavily early because amounts were inadequate. They gained when stover silage was increased. Cows fed ad libitum on dry milo stover lost weight during the last 30 days of the trial.
Open Access
Wheat, barley, oat and corn silage rations for growing steers
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Bolsen, K.; Oltjen, J.; Riley, Jack G.
Eleven wheat, barley, oat and corn silages were evaluated in two steers growing trials in 1975 and 1976. In both trials, steers fed barley or corn silages had similar rate and efficiency of gains. Also, barley and corn silages supported greater performance than any of the seven wheat or oat silages. In the 1976 trial steers fed Trio or Lodi oat silage had the lowest feed consumption and made the slowest and least efficient gains. For an average of the two trials barley and corn silages had similar feeding values. Wheat silages had 90 and 80% the relative feeding value of corn silage in 1975 and 1976, respectively. Oat silages had only 48% the feeding value of corn silage in 1976.
Open Access
Sources of supplemental protein for cows wintered on milo stubble
(Kansas State University. Agricultural Experiment Station, 2011-03-04) McKee, M.; Kimple, K.; Conway, K.
We used 63 pregnant Hereford cows in mid gestation to evaluate need and source of supplemental protein on milo stubble. Cows fed free choice a 16% experimental nonprotein-nitrogen-based liquid supplement lost significantly more weight than cows receiving 2 lbs/head/day of a 16% natural protein cube or cows getting no protein supplement. Cows with access free choice to an 18% commercial nonprotein-nitrogen-based liquid supplement lost significantly more than cows receiving 2 lbs/head/day of 16% natural protein cube.
Open Access
Characteristics of beef finished on selected feeding regimes
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Allen, Dell M.; Hunt, Melvin C.; Kropf, Donald H.; Gutowski, G.; Harrison, A.; Smith, M.E.; Kastner, Curtis L.; ckastner
Thirty-eight crossbred steers of known background were randomly assigned to four feeding regimes. All initially were fed on a brome and bluestem pasture supplemented during winter with alfalfa and protein. Ten grass-fed animals were slaughtered directly off pasture at the end of summer. Ten steers were fed an additional 49 days (short-fed), and eight 98 days (long-fed) on 80 percent concentrate and 20 percent corn silage. In addition, ten silage-fed animals were fed 60 percent corn silage and 40 percent concentrate for 98 days. Carcass characteristics were evaluated along with shear force (tenderness) and taste panel responses.
Open Access
Feeding Monensin to yearling cattle on summer grass
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Schwartz, F.; Smith, E.; Riley, Jack G.; Corah, L.
Two grazing trials conducted at different locations in Kansas evaluated feeding Monensin to grazing yearling cattle. In one trial Monensin was fed with and without implant treatments of diethylstilbestrol or Ralgro. Monensin increased weight gain on summer grass; diethylstilbestrol and Ralgro implants also increased weight gains, and the combination of Monensin with either implant was more effective than Monensin alone.
Open Access
Forage and grain sorghum double-cropped following harvest of small grain silages
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Posler, Gerry L.; Bolsen, K.
The attempt to increase total forage TDN per acre by double-cropping was only moderately successful in 1975 and 1976. Limiting factors were relatively poor stands and extremely dry summer growing seasons.
Open Access
Effect of Feeding Rumensin during the growing phase on subsequent reproductive performance of yearling heifers
(Kansas State University. Agricultural Experiment Station, 2011-03-04) Corah, L.; Bolsen, K.; McKee, M.; Riley, Jack G.
Seventy five purebred heifers were used to determine whether Monensin, (trade name Rumensin) fed during the initial growing period after weaning, would affect the reproductive performance of yearling heifers. Rumensin had virtually no effect on reproductive performance as determined by the percentage of heifers cycling at the start of the breeding season or the percentage of heifers that conceived at first service and during the breeding season. A slightly higher percentage of the Rumensin fed heifers were cycling at the start of the breeding season. Although the study shows that replacement heifers on roughage rations can successfully be fed Rumensin, causing both a savings in feed as well as improved growth rate, current clearance of Rumensin does not recommend its use with breeding animals.
Open Access
Conception rates in synchronized heifers bred at various times after onset of estrus
(Kansas State University. Agricultural Experiment Station, 2011-03-04) DeBenedetti, R.C.; Kiracofe, G.H.; Ward, H.S.; McKee, R.M.
One hundred seven of 112 heifers were in estrus 1 to 5 days after an injection of prostaglandin F2α given when a 7-day synchronization implant was removed. Checks for estrus were made every four hours and heifers were bred 6, 10, 14, 18, 22, or 26 hours after being detected in estrus. Eight heifers were not bred on schedule. Sixty-seven of 99 (67.7%) bred on schedule conceived to first artificial insemination. Conception rates were similar in heifers bred 6 to 26 hours after being detected in estrus, no differences were noted in conception rates between A.M. and P.M. breedings.