17 research outputs found
Effects of interactions between aspergillus oryzae extract (Amaferm) and antimicrobial compounds on the growth of ruminal bacteria
The effect of Amaferm, with or without
antimicrobial compounds, was determined on
the growth rate of pure cultures of predominant
ruminal bacteria. Adding Amaferm to media
containing chlortetracyline or neomycin tended
to diminish the negative effects of those compounds
on the growth rate of some ruminal
bacteria, even when they had shown no positive
response to Amaferm alone. However,
adding Amaferm to media containing tylosin
decreased the growth rate of Selenomonas
ruminantium D. These results indicate that
Amaferm interacts both positively and negatively
with certain antimicrobial compounds
Performance and ruminal microbial and metabolic development of young calves fed diets containing aspergillus oryzae extract
The 1990 Annual KSU Dairy Day is known as Dairy Day, 1990Seventy-three, neonatal, Holstein, heifer calves in one experiment and 45 neonatal, Holstein,
bull calves in another were used to study the effects of dietary Aspergillus oryzae extract (Amaferm)
on calf performance. Forty of the heifer calves were selected to study the effects on ruminal microbial
and metabolic development. In general, Amaferm-supplemented calves had greater ruminal microbial
activity than the calves fed no Amaferm. For the most part, growth and feed intake were not affected
Efeito da adição de butirato de sódio, propionato de cálcio ou monensina sódica no concentrado inicial sobre parâmetros ruminais e de desenvolvimento do rúmen de bezerros leiteiros
Effect of physical form of diet on ruminal microbial and metabolic development in young calves
The 1990 Annual KSU Dairy Day is known as Dairy Day, 1990Eight, ruminally cannulated, newborn, Holstein, bull calves were assigned to receive either
finely ground or unground (chopped hay and normally ground grain) diet to study the effects of diet
form on ruminal microbial and metabolic development. The difference in diet particle size caused a
difference in ruminal pH and a shift in the bacterial population, as evidenced by decreased cellulolytic
and increased amylolytic bacterial counts for the ground diet
Influence of supplemental grain type on forage utilization by beef steers consuming early summer bluestem
Supplementation of early summer bluestem with low levels of corn, wheat, or
sorghum grain had no effect on forage intake, forage digestibility, or total dry matter
digestibility in beef steers, compared with a regimen of no supplementation. Increased
total dry matter intakes for the supplemented steers reflected supplement
consumption
Influence of sorghum grain supplementation on forage utilization by beef steers consuming immature bluestem
Supplementing beef steers consuming immature bluestem with 0, 1, 2, or 4
lbs of sorghum grain daily did not affect forage intake. Thus, total intake
increased as level of grain increased. Total dry matter, cell wall, and starch
digestibilities were mildly depressed with increasing grain. Rumen fill and rates of
passage were similar for all treatments, and differences in rumen fermentation
characteristics were minimal
Influence of supplemental protein concentration on intake, utilization, and quality of diet selected by steers grazing dormant tallgrass-prairie
Fifteen ruminally and 12 esophageally cannulated steers were randomly assigned to
receive low (LP), moderate (MP), and high (HP) crude protein (CP) supplements in a 23-day
winter grazing trial designed to evaluate dormant tallgrass forage intake and utilization.
Supplemental CP levels were 13, 26, or 39%, respectively. Forage organic matter (OM) intake
was greatest (P<.05) for the MP steers. Likewise, fiber (NDF) digestibility and ruminal fill
were largest (P<.10) for the MP treatment. Furthermore, the quality of diet selected tended
to improve with increasing supplemental protein concentration. Increasing CP concentration
in supplements dramatically improves the intake and utilization of dormant forage. In this study,
intake and digestibility were optimized with the MP supplement
Soybean meal+milo, alfalfa hay, and dehydrated alfalfa pellets as protein sources for steers fed dormant, native tallgrass forage in drylot
Sixteen ruminally-cannulated steers consuming dormant tallgrass-prairie forage were
randomly assigned to one of four treatments: 1) control, no supplement; 2) soybean meal
(SBM)+sorghum grain; 3) alfalfa hay; or 4) dehydrated alfalfa pellets. Forage dry matter (DM)
intake was at least doubled by all three supplemental protein treatments (P<.01). In addition,
steers supplemented with dehydrated alfalfa pellets displayed 15% higher forage DM intakes
than steers supplemented with SBM+sorghum grain or alfalfa hay. Total DM digestibility did
not differ (P>.10) among treatments; however, fiber (NDF) digestibility was depressed in steers
supplemented with SBM+sorghum grain or dehydrated alfalfa pellets, compared with controls.
Results from this study reinforce the concept that supplemental protein improves forage intake
and utilization. Additionally, alfalfa hay and dehydrated alfalfa pellets appear to be at least as
effective as SBM+sorghum grain when fed on an equal protein and energy basis