37 research outputs found
Evaluation of the protein characteristics of four diverse grasses
Forage protein characteristics in four grasses were evaluated by the nylon bag method. All of the forages used (Bermudagrass hay, brome hay, forage sorghum hay, and prairie hay) were of relatively low quality, except the Bermudagrass, which was of average quality. The forages differed in the size of different protein fractions and in the rate and extent of protein degradation. Predicted extent of ruminal protein degradation (i.e., ruminal protein availability) was lowest for prairie hay, intermediate for Bermudagrass and forage sorghum hay, and highest for the brome hay
Effects of supplemental degradable intake protein on intake and digestibility of low-quality brome hay
The effects of increasing levels of degradable intake and digestion of low-quality brome hay were evaluated using 16 ruminally fistulated beef steers. Trends were evident for small, positive changes in total intake and digestion with increasing level of DIP supplementation. As a result, total digestible to feeding forage to provide .041, .082, and OM intake (TDOMI) increased with DIP supplementation but tended to plateau below the highest supplementation level
Impacts of wheat milling by-products in supplements on the intake and digestion of steers consuming low-quality forage
Sixteen ruminally fistulated steers were used
to evaluate the effects of feeding supplements
containing combinations of two wheat-milling
by-products on forage intake, digestibility, and
ruminal characteristics. The by-products
accounted for 47 to 49% of each supplement
and were as follows: 1) 100% wheat bran; 2)
67% wheat bran, 33% second clears; and 3)
33% wheat bran, 67% second clears. All
supplements contained about 30% CP. Compared
with unsupplemented controls, forage
intake and digestibility were significantly higher
for supplemented steers. However, no differences
occurred among by-product treatments.
In conclusion, if the protein content is adequate,
the choice of bran (high digestible fiber) vs.
second clears (high starch) has little impact on
forage use
Wheat bran and second clears as supplemental energy sources for beef cows grazing winter pasture
Ninety spring-calving Hereford × Angus
cows grazing low-quality, tallgrass-prairie
forage during the winter were fed 5 lb/day of a
supplement containing combinations of wheat
bran (high in digestible fiber) and second clears
(high in starch). The by-product combinations
accounted for 47 to 49% of each supplement,
as follows: 1) 100% wheat bran; 2) 67% wheat
bran, 33% second clears; and 3) 33% wheat
bran, 67% second clears. Cow performance
was measured by changes in body weight and
body condition score. The combinations of
wheat bran and second clears had no significant
effects on cow performance, calf birth weights,
calf performance, or cow pregnancy rates
Effects of various carbohydrate sources on the utilization of low-quality tallgrass-prairie hay in continuous culture
We evaluated the effects of supplemental carbohydrate sources on the utilization of low-
quality forage in continuous “artificial rumen” culture. Providing readily digestible carbohydrates (starch, glucose, and fiber) did not improve total diet digestion. In fact, starch and glucose depressed fiber digestion. Response to other simple sugars was variable
Effects of increasing amounts of supplemental soybean meal on intake and digestibility of tallgrass-prairie hay
Twenty ruminally fistulated beef steers free-choice access to prairie hay were used to evaluate the effect of increasing level of soybean meal (SBM) on forage intake and digestion.
Forage intake, total organic matter intake, and organic matter digestion were enhanced with
increasing level of SBM supplementation, although forage intake and digestion appeared to
plateau at higher levels. The concomitant rises in intake and digestion as supplemental SBM
increased resulted in an increase in total digestible organic matter intake, with the largest response to the initial increment of supplement
Impact of increasing amounts of supplemental high-protein soybean meal on performance of range beef cows
One hundred and twenty spring-calving Hereford × Angus cows grazing low-quality,
tallgrass-prairie forage were fed 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, or 6.0 lb soybean meal (SBM) per head daily. SBM as a source of supplemental degradable intake protein (DIP) can be
effective in maintaining cow body weight and body condition during the winter grazing season.
Performance as measured by changes in body weight and condition score was maximized when
cows received approximately 3.5 to 3.8 lb/day. Below this level, cows lost about 48 lb (about .4 units of BCS) for every 1 lb decrease in the amount of supplemental SBM. The effect of amount of supplemental SBM on calf performance was minimal
Synchronizing estrus in replacement beef heifers using select synch, MGA, AND PGF2
The Select Synch protocol (GnRH at day -
7, PGF2 at day 0, AI at detected heat) was
compared to protocols using either MGA +
prostaglandin (Colorado system) or two injections
of prostaglandin to synchronize estrus in
replacement heifers at three locations. Percentage
of heifers detected in heat before, during, or
after the target breeding week was not different
among treatments but varied in percentages
among locations. Overall conception rates
ranged from 64 to 69%. Pregnancy rates
varied from 46 to 56% and tended to be greatest
in the MGA + PGF2" treatment. Costs of
these treatments ranged from 8 and
were lowest for the MGA + PGF2 protocol
Effects of supplemental degradable intake protein on intake and digestibility of bermuda hay
A study with 16 ruminally fistulated beef
steers fed Bermuda hay ad libitum showed that
the intake and digestibility of hay was not influenced
by increasing levels of supplemental
degradable intake protein (DIP). However, the
hay used in this study was of medium quality;
lower quality Bermuda hay with lower CP may
respond to supplemental DIP