5 research outputs found
Suplementação de novilhos mestiços durante a época das águas: parâmetros ingestivos e digestivos
Influence of frequency of energy supplementation on utilization of early-summer, tallgrass prairie forage
Fifteen ruminally cannulated beef steers
were used in a pasture supplementation experiment
to determine the effects of frequency of
energy supplementation on intake and digestion
of tallgrass prairie forage during early to
mid-summer. Steers grazed a common pasture
and were assigned to the following treatments:
no supplement (control); 4 lb rolled
sorghum grain/head/day; 9.3 lb grain/head/3
times weekly. Steers in the two supplemented
groups consumed the same amount of sorghum
grain/head/week. In general, supplementation
was not harmful (P =.17) to forage intake.
However, providing supplement 3 times
weekly tended (P =.11) to depress forage
intake compared with daily supplementation.
Although supplementation tended (P =.07) to
cause selection of less fiber in the diet, total
forage digestion tended (P<.07) to be depressed
by supplementation. However, total
diet organic matter digestibility was not significantly
altered by treatment, probably because
of the impact of the highly digestible supplement.
Based on trends in intake and grazed
forage selection, achieving optimal benefit
from supplementation of cattle grazing relatively
high-quality forage appears more likely
when its provided daily rather than 3 times
weekly
Influence of frequency of supplementation and protein concentration in supplements on digestion characteristics of beef steers offered wheat straw
Eight ruminally cannulated steers were
used to determine digestion characteristics of
soybean meal/sorghum grain supplements
containing 12%, 20%, 30%, or 39% crude
protein (CP) fed either daily (7X) or three
times weekly (3X). The basal forage was
wheat straw. Weekly supplement intake was
the same per week (30.5 lb) for both frequency
groups. The effect of feeding supplements
differing in protein concentration on wheat
straw intake and dry matter digestibility
(DMD) did not depend on frequency of
supplementation. Increased frequency of
supplementation resulted in greater intake of
straw, although DMD was slightly depressed.
Increasing protein concentration in the supplements
was associated with increases in both
straw intake and DMD
Influence of method of processing supplemental alfalfa on intake and utilization of dormant, bluestem-range forage by beef steers
A digestion trial was conducted to determine
the effect of method of processing
supplemental alfalfa on the intake and utilization
of dormant, bluestem-range forage.
Supplement treatments were 1) control: no
supplement; 2) ground and pelleted, suncured
alfalfa; 3) ground and pelleted dehydrated
alfalfa; and 4) longstem alfalfa hay. Bluestem
forage intake (% BW), diet digestibility, and
ruminal dry matter fill 4 hours after feeding
were increased (P<.10) when supplemental
alfalfa was fed, compared with no
supplementation. Little difference was evident
among different forms of supplemental alfalfa
for most of the forage utilization characteristics
measured. However, a weak trend (P=.18)
was observed for increased intake of bluestem
forage by the steers supplemented with dehydrated
alfalfa pellets compared with suncured
alfalfa pellets
Effect of level of supplemental alfalfa and its method of processing on intake and utilization of wheat straw
Sixteen ruminally fistulated steers were
used to study the effects of supplemental alfalfa
level (.25 or 1.0% body weight [BW]) and
method of processing (hay or pellets) on wheat
straw utilization. Response to increased level
of supplemental alfalfa did not dependent on
method of processing (longstem vs pelleted) for
the quality of alfalfa (22.7% CP) used in this
trial. Increasing the level of alfalfa from .25
to 1.0% of BW reduced (P#.02) straw intake
and diet digestibility, but increased (P<.002)
digestible dry matter intake by steers. With
high quality hay, ground and pelleted alfalfa
elicits the same type of response as longstem
alfalfa