Effects of propionibacteria and yeast culture fed to steers on nutrient intake and site and extent of digestion.

Effects of propionibacteria and yeast culture fed to steers on nutrient intake and site and extent of digestion. Research Abstract Details 

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Effects of propionibacteria and yeast culture fed to steers on nutrient intake and site and extent of digestion. Abstract Text:

K V Lehloenya,C R Krehbiel,K J Mertz,T G Rehberger,L J Spicer,K V Lehloenya,C R Krehbiel,K J Mertz,T G Rehberger,L J Spicer,

The effects of feeding Propionibacterium strain P169 (P169), yeast culture (XPY), and their combination on nutrient intake, site and extent of digestion, and ruminal kinetics were evaluated in a completely randomized experimental design. Ruminally and duodenally cannulated Angus x Hereford steers (n = 12) were assigned to 1 of 4 treatments in each of 2 periods: 1) control, fed a sorghum silage-based total mixed ration; 2) P169, fed the control plus P169 (6 x 10(11) cfu/steer per d); 3) XPY, fed the control plus XPY (56 g/steer per d); and 4) P169 + XPY, fed the control plus P169 and XPY (at 6 x 10(11) cfu/steer per d and 56 g/steer per d, respectively). Each period lasted 21 d; d 1 to 15 were used for diet adaptation and d 16 to 21 were used for fecal, duodenal, ruminal, and blood sample collection. Steers were individually housed and fed. Feeding XPY tended to decrease intake of organic matter, acid detergent fiber, and N, and decreased intake of neutral detergent fiber. However, feeding XPY alone tended to increase total tract digestibility of organic matter, N, neutral detergent fiber, and acid detergent fiber. Ruminal digestibility, duodenal flow, microbial N synthesis, microbial efficiency, and fluid and particulate passage rates were not affected by dietary treatments. Feeding P169 tended to decrease molar proportion of acetate, increased molar proportion of propionate (by 9.7%), and tended to decrease acetate:propionate ratio compared with control steers. No other effects of XPY or P169 on ruminal fermentation were observed. Plasma glucose and insulin concentrations were not affected by dietary treatment. Our results suggest that feeding P169 alters ruminal metabolism toward increased propionate without affecting feed intake or ruminal kinetics, whereas feeding XPY alone tended to increase total tract digestibilities of nutrients.

Effects of propionibacteria and yeast culture fed to steers on nutrient intake and site and extent of digestion. Publishing Authors By Initials

KV Lehloenya,CR Krehbiel,KJ Mertz,TG Rehberger,LJ Spicer,KV Lehloenya,CR Krehbiel,KJ Mertz,TG Rehberger,LJ Spicer,

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Effects of propionibacteria and yeast culture fed to steers on nutrient intake and site and extent of digestion. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of dairy science

VOLUME: 91

Page Numbers: 653-62

Journal Abbreviation: J. Dairy Sci.

ISSN: 1525-3198

DAY: 25

MONTH: Feb

YEAR: 2008

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LANGUAGE: eng

NlmUniqueID: 2985126

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AFFILIATION: Department of Animal Science, Oklahoma State University, Stillwater, Oklahoma 74078, USA.

Country: United States

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MEDLINETA: J Dairy Sci

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