Characteristics of water soluble markers for measuring rumen liquid volume and dilution rate.

  title={Characteristics of water soluble markers for measuring rumen liquid volume and dilution rate.},
  author={Robert G. Teeter and Fredric N. Owens},
  journal={Journal of animal science},
  volume={56 3},
  • R. TeeterF. Owens
  • Published 1 March 1983
  • Chemistry, Medicine
  • Journal of animal science
The utility of five water soluble markers (WSM) for measuring rumen liquid volume and dilution rate was examined in nine in vitro and in vivo experiments. The WSM tested included polyethylene glycol (PEG) and ethylenediaminetetraacetic acid (EDTA) complexes of Cr, Co, Fe and Yb. Feedstuffs incubated in vitro absorbed variable amounts of distilled H2O and autoclaved rumen fluid with roughages imbibing greater (P less than .05) amounts of fluid than feeds higher in starch. Liquid present in the… 

Rumen liquid dilution rate in dairy cows fed once daily: effects of diet and sodium bicarbonate supplementation.

Ruminal liquid volume calculated from either dosing method overestimated liquid volume compared to manual estimates and mean liquid dilution rates did not differ between methods of dosing, and differences between diets were closely related to dry matter intake.

A method for estimating dry forage intake by sheep using polyethylene glycol as a faecal marker measured with NIRS.

It has been proved that with PEG (measured with NIRS) administered once and using the grab sampling procedure (morning collection), it is possible to estimate the DMI of dry feeds with good accuracy and more research is needed as the estimated results are still highly variable.

Stability of the liquid markers chromium (III) and cobalt (III)-EDTA in autoclaved, clarified rumen fluid.

Changes in the absorbance values at λ = 330 and 380 nm suggest that soluble phenolic compounds may be involved in the exchange of metals with EDTA, but that does not preclude involvement of other components in rumen fluid.

Effects of dietary fiber and feeding frequency on ruminal fermentation, digesta water-holding capacity, and fractional turnover of contents.

The dynamics of digesta WHC (kilograms) associated with dietary fiber source and feeding frequency suggest that it may influence the contribution of water and salivary secretions to ruminal liquid contents.

Effects of intravenous lipopolysaccharide administration on feed intake, ruminal forage degradability, and liquid parameters and physiological responses in beef cattle.

LPS administration transiently reduced DMI in steers via physiological reactions that modulate gastrointestinal motility and satiety centers in the central nervous system, in addition to potential host-microbiome endocrine interactions that impaired ruminal hay DM and NDF degradability.

The effect of in vitro fermentation on specific gravity and sedimentation measurements of forage particles.

The results suggest that degradation rate of fibrous particles is related to changes in FSG and GA and, therefore, could influence ruminal transit and, however, FSG was unable to predict accurately the sedimentation behavior of samples.

Ruminal degradation and outflow of amino acids in cows.

Two rumen- and duodenum-cannulated cows were used to study the disappearance rate, degradation in, and outflow from the rumen of four amino acids administered individually into the rumen at the


  • S. Salem,
  • Journal of Animal and Poultry Production
  • 2005
Twenty four Friesian bulls with a mean live body weight of 450±32 Kg, belonging to Sakha experimentral farms were used in the present study under the same dietary regime. The rumen volume and flow



Evaluation of polyethylene glycol method in determining rumen fluid volume in dairy cows fed different diets.

Abstract The use of polyethylene glycol in determining rumen fluid volume of cows fed liberal amounts of roughage and grain (control) or high-grain, low-fiber diets was studied. The polyethylene

A method of circulating and sampling the rumen contents of sheep fed on ground, pelleted foods

This paper describes the construction and use of a pump which withdraws rumen contents from a more or less central position in the rumen, forces them through an external circuit containing a sampling device before returning them to the liquid surface in theRumen, and thus gives rapid mixing ofRumen contents.

Ruminal microbial yields: factors influencing synthesis and bypass.

: Bacterial growth (protein production) in the rumen is typically limited by anaerobic energy supply. But the mass of bacteria produced per mole of ATP (YATP) varies markedly with turnover or growth