Forestomach and whole tract digestibility for lactating dairy cows as influenced by feeding frequency.
TL;DR: Frequency of feeding had no effect on almost all measures and components of rumen and whole tract metabolism and digestion of lactating Holstein cows.
About: This article is published in Journal of Dairy Science.The article was published on 1985-04-01 and is currently open access. It has received 80 citations till now. The article focuses on the topics: Neutral Detergent Fiber & Rumen.
Citations
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TL;DR: It was concluded that optimum bacterial growth in the rumen occurs when EMPS is 29 g of bacterial N/kg of fermented organic matter, and ENU is 69%, implying that bacteria would require about 1.31 x rumen-available N per unit ofacterial N.
1,144 citations
Cites result from "Forestomach and whole tract digesti..."
...In vivo results have been discordant with in vitro observations, with increases in ruminal liquid dilution rate resulting in higher (Zinn and Owens, 1983; Robinson and Sniffen., 1985), similar (Chamberlain and Thomas, 1979; Merchen et al....
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TL;DR: Additional research with cows consuming large amounts of feed are needed to identify combinations of feed ingredients that synchronize availabilities of energy and N for optimizing ruminal digestion, microbial protein synthesis, nutrient flow to the small intestine, and milk production and composition.
797 citations
TL;DR: Analysis of the literature confirms that increased particulate passage rate is associated with higher rumen H2 concentrations, less CH4 formation, and increased importance of propionate as a fermentation endproduct, and the model suggests that the prevailing H2 concentration influences the thermodynamics of rumen fermentation.
556 citations
TL;DR: Five dairy cows fitted with large-diameter rumen cannulae were fed diets of two-thirds pelleted concentrate that contained 5 proportions of starch to determine the effects of intake level and proportion of starch in the concentrate on rumen content of soluble and dry matter (DM) components as well as the kinetics of rumen neutral detergent (ND) fibre digestion and passage.
200 citations
TL;DR: Concepts are developed and validated for a mechanistic, dynamic approach for prediction of microbial growth and flow of microbial protein based on Michaelis-Menton equations, microbial substance affinities, and rumen liquid flow kinetics.
182 citations
References
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01 Jan 1970
5,332 citations
TL;DR: Combinations of reagents are described for the catalyzed indophenol reaction for the determination of ammonia, which produces a stable blue color, and the procedure is adapted to thedetermination of urea after hydrolysis with urease.
Abstract: Combinations of reagents are described for the catalyzed indophenol reaction for the determination of ammonia, which produces a stable blue color. The procedure is adapted to the determination of urea after hydrolysis with urease.
3,453 citations
TL;DR: A new liquid marker, cobalt-ethylenediamine tetraacetic acid (EDTA), and two solid markers, chromium (Cr) and cerium (Ce) mordanted plant cell walls, were investigated and Co- EDTA was found to be comparable to Cr-EDTA.
Abstract: A new liquid marker, cobalt-ethylenediamine tetraacetic acid (EDTA), and two solid markers, chromium (Cr) and cerium (Ce) mordanted plant cell walls, were investigated. Synthesis and methods of analysis are described for the markers. The Cr- and Ce-cell wall complexes were tested for stability to EDTA, hydrochloric acid and rumen microorganisms. Plant cell walls were rendered indigestible by mordanting with Cr and 98% of the marker remained on the fibre after a simulated sequence (in vitro) of digestion. Ce-mordanted cell walls were 35% digestible in vitro using a rumen culture, and 56% of the marker could be washed off the remaining fibre. Treatment with EDTA removed all Ce and 15% of the Cr. Hydrochloric acid (0.01M) had a negligible effect on the removal of Cr from the cell walls, whereas 0.1M acid removed, on average, 10% of the marker. Losses of Cr from the mordant may be related to the quality of the preparation. Co-EDTA was found to be comparable to Cr-EDTA. The urinary excretion of Cr and Co was 2–3% in most animals except in rabbits, which excreted as much as 30% of the liquid markers in the urine.
1,424 citations
"Forestomach and whole tract digesti..." refers methods in this paper
...EDTA) was prepared as described by Ud~n et aI. ( 37 ) and pulse dosed to the rumen at 300 h of day 11 of each period at 2.27 g Co EDTA/kg intake as fed....
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