49 research outputs found
The effect of implants on gain of steers and heifers grazing native grass
No full textFour trials were con ducted to determine the
effect of different implants on steers and heifers
grazing native grass pastures for different
lengths of time. In addition, two groups of
steers were followed through a feeding period
to determine if previous implanting had a
residual effect on gain. The implanted
(Ralgrofi, Ralgrofi Magnum , Synovex Sfi)
steers gained faster than the controls; however,
no differences in gain occurred among implants.
In the finishing group that went on grass at 687
lb, implants had no effect on subsequent feedlot
gain. In the second group (on grass at 569 lb
and grazing for 80 days), controls gained faster
in the feedlot than those that ha d been implanted
on grass, resulting in essentially equal weights
for all treatments. Among the heifer groups, no
differences occurred in pasture gains. Genetic
differences in cattle, length o f grazing, and other
factors may change implant results
Effect of long-acting penicillin and Levamisole® on gain and health of stressed calves
No full textTwo 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 Ralgro® on performance of steers grazing high and low endophyte fungus-infested tall fescue pastures
No full textSteers were either not implanted or implanted with 36 or 72 mg of Ralgro, then
allowed to graze on both high and low endophyte fungus tall fescue pastures. Ralgro
had a greater effect on improving gains of steers grazing high endophyte fungus
pastures than on those grazing lowly infected fescue pastures
Effect of Deccox® in a free-choice, grain-mineral mixture on performance of yearlings grazing native range
No full textIncluding Deccox® in a free-choice, intake-limiting, grain-mineral mixture tended to
increase grazing stocker gains and substantially reduced the percentage of newly arrived cattle
treated for sickness and the number of treatments required per animal
Effect on summer stocker gains when native grass pastures were either grazed short during the dormant season or burned in April
No full textFour hundred and ten mixed-breed heifers
were intensively early grazed for 81 days on
native tall grass pastures where dormant
growth had been removed by either winter
grazing or April burning. Heifers grazing the
burned pastures gained .19 lb/day more (1.99
vs 1.80 lb; P<.05) than those grazing
pastures that had the dormant grass removed
by heavy grazing during February and March
Comparison of implants in grazing heifers and carryover effects on finishing gains and carcass traits
No full textCrossbred yearling heifers were allotted randomly to three grazing implant treatments: 1) control (CONT), 2) Component® E-H (CEH), and 3) Ralgro® (RAL). After grazing native grass for 74 days, the heifers were transported to a western Kansas feedlot. All heifers were implanted with Synovex-H® upon arrival at the feedlot and were reimplanted70 days later with Finaplix-H®. The CEH heifers gained faster while on grass (P<.10) and in the feedlot than the RAL heifers. The CEH heifers had heavier carcasses than RAL heifers. Control heifers had the largest ribeyes. Other carcass traits, including USDA quality grade, were not influenced by pasture treatment. In this study, administration of CEH to heifers grazing native grass optimized overall performance whencombined with the feedlot implants (Synovex-H and Finaplix-H)
Effect of Zinpro 100® in a mineral mixture on gain and incidence of footrot in steers grazing native grass pastures
No full textIn a 3-year study, crossbred steers averaging
585 lb were allotted to groups given
either a control or zinc methionine-supplemented
mineral mixture while grazing burned
native pastures in early summer. The steers
were monitored for weight gain and incidence
of footrot. The addition of 100 lb Zinpro 100®
(50% zinc methionine) per ton of free-choice
mineral mixture improved (P<.06) steer daily
gain .08 lb. and reduced the incidence of
footrot 55% (5.38 vs. 2.45%; P<.06). The
gain benefit could not be attributed entirely to
reduced footrot, but appeared to also have a
nutritional basis
The effect of mass treatment with Micotil® at arrival on the health and performance of long-hauled calves
No full textLong-hauled calves (n=170 were either
mass-medicated with Micotil® or served as
controls. Micotil reduced mortality (1.2 vs
8.1%) and morbidity (59.7 vs 75.5%), but it
did not improve ADG
The effect of Aureomycin® in combination with Bovetec® in a mineral mixture on steers grazing native grass
No full textThree hundred twelve mixed-breed steers
(590 lb) were allotted randomly to eight
native grass pastures on April 20. The
pastures were grazed until July 13. The
steers in four pastures received a basic
mineral mix with 800 mg of Bovatec7 per lb.
The other four pastures received the basic
mineral mixture with Bovatec plus 1.6 lb
Aureomycin 50 per 50 lb of mineral. The
steers receiving the mineral with
Aureomycin had greater mineral
consumption (P<0.04). Including
Aureomycin in the mineral increased gain by
2%; however, the response was not
statistically significant
Effect of feed additives on shipping shrinkage of yearling heifers
No full textTwo 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
