Introduction Current NRC recommendations for dairy cattle provide only minimum recommendations for chemically measured fiber. However, physical characteristics of fiber can influence animal health, ruminal fermentation, animal metabolism, and milk fat production independently of the amount of chemically measured fiber. Using ground fibrous by-product feeds or finely chopped forages in rations t...

J. Anim. Sci. Vol. 88, E-Suppl. 2/J. Dairy Sci. Vol. 93, E-Suppl. 1/Poult. Sci. Vol. 89, E-Suppl. 1 481 Effect of Origanium vulgare on ruminal fermentation, nutrient utilization, and production in dairy cows. J. A. Tekippe*1, A. N. Hristov1, K. S. Heyler1, T. W. Cassidy1, V. D. Zheljazkov2, and G. A. Varga1, 1Pennsylvania State University, University Park, 2Mississippi State University, NMREC, ...

A metabolism trial was conducted to evaluate the effects of supplying a yeast culture containing Saccharomyces cerevisiae (Levucell) and monensin to sheep, on ruminal fermentation and digestibility of diets. Four Suffolk sheep (30 kg BW) with ruminal cannula were used in a Latin Square design, where treatments were control (C), 1 g/day of Levucell (L, 20 10 CFU/g), 25 mg/ day of monensin (M) an...

Our objective was to measure ruminal fermentation characteristics and site and extent of nutrient digestion in sheep limit-fed an 81.6% (DM basis) concentrate diet supplemented with increasing levels of soybean oil. Eight white-faced wether lambs (39.9 ± 3.0 kg BW) fitted with ruminal, duodenal, and ileal cannulas were used in a replicated 4 × 4 Latin square experiment. Diets were formulated to...

In this study, two experiments were conducted to evaluate the total mixed ration with fermented feed (TMRF) and total mixed ration (TMR) by rumen in vitro fermentation and their effects on the growth performance and blood characteristics of Hanwoo steers. In experiment 1, three Hanwoo steers (600±47 kg), each permanently fitted with a ruminal cannula were used. In this experiment, three diets d...

Strategies are sought to reduce economic and environmental costs associated with ruminant methane emissions. The effect of oral nitroethane or 2-nitropropanol administration on ruminal methane-producing activity and volatile fatty acid production was evaluated in mature ewes. Daily administration of 24 and 72 mg nitroethane/kg body weight reduced (P<0.05) methane-producing activity by as much a...

Two experiments were conducted to determine the effects of corn hybrid and processing method on the site and extent of nutrient digestibility and ruminal fermentation. Treatments consisted of 2 processing methods, dry-rolled corn (DRC) and high-moisture corn (HMC), and 3 hybrids, H-8562 (1), 33P67 (2), and H-9230 (3), in a 2 × 3 factorial arrangement. In Exp. 1, six ruminally cannulated crossbr...

We evaluated the effect of several compounds on their ability to reduce the production of sul®de in in vitro ruminal fermentations, when sulfur content of the diet was 1% (dry matter basis). Excess sulfur increased (p<0.05) ruminal sul®de production, but had no effects on VFA production. The effect of 1, 10 and 25 ppm ( ̄uid basis) of 9,10 anthraquinone (AQ) and molybdenum in high sulfur diets w...

Two studies were conducted to assess whether routine applications of near infrared reflectance spectroscopy could predict the effects of silage proteolysis on ruminal crude protein (CP) degradation of legume and grass silages. A preliminary study was conducted to assess the effect of laboratory drying method on ruminal CP degradation of silages. Thirty legume and grass silages were freeze-, ove...

In this study four ruminant species of Nuremberg Zoo were evaluated for subacute ruminal acidosis according to the feeding management. Parameters of microbiological fermentation of the rumen as well as rumen tissue samples were examined. Additionally, investigations on claw health, in terms of laminitis were made. Three of the four species, all grassand roughage feeders, showed severe character...