In vitro

Chemical composition and physicochemical characteristics of feed ingredients and effects on in vitro ileal and total tract digestibility of dry matter

The chemical composition and structure of dietary fiber, as well as physicochemical characteristics such as bulk density, swelling, water binding capacity, and viscosity, may influence the digestion of energy and nutrients in feed ingredients. Having a complete account of the components of a feed ingredient, particularly the type and concentration of fiber, is necessary in order to accurately the energy value of an ingredient using prediction equations.

An experiment was conducted to obtain a detailed description of the composition of ten feed ingredients, and to compare the analyzed gross energy (GE) with the GE predicted by adding together the measured energy-containing components. A secondary objective was to measure the in vitro apparent total tract digestibility (IVATTD) and in vitro apparent ileal digestibility (IVAID) of dry matter (DM) and organic matter (OM) in the feed ingredients, and to determine the correlations between the physicochemical characteristics of the ingredients and the in vitro digestibility.

Keywords: 
In vitro, Dry matter digestibility, Organic matter digestibility, Dietary fiber
Authors: 
Navarro, Bruininx, de Jong, Stein
Publication Type: 
Research Reports

Evaluation of in vitro procedures to measure digestibility of fiber in distillers dried grains with solubles

Urriola, P. E. and H. H. Stein. 2010. Evaluation of in vitro procedures to measure digestibility of fiber in distillers dried grains with solubles. J. Anim. Sci. 88(E-Suppl. 2):368-369 (Abstr.) Link to abstract (.pdf)

Keywords: 
Distillers dried grains with solubles, In vitro, Inoculum
Authors: 
Stein, Urriola
Publication Type: 
Abstracts

Evaluation of lysine digestibility in rumen undegraded protein using the precision-fed rooster assay and two in vitro methods

Boucher, S. E., C. Pedersen, H. H. Stein, C. M. Parsons, and C. G. Schwab. 2007. Evaluation of lysine digestibility in rumen undegraded protein using the precision-fed rooster assay and two in vitro methods. J. Anim. Sci. 85(Suppl. 1):682 (Abstr.) Link to abstract (.pdf)

Keywords: 
Lysine, In vitro, Lysine digestibility, Rumen undegraded protein, Cecectomized roosters
Authors: 
Schwab, Pedersen, Parsons, Boucher, Stein
Publication Type: 
Abstracts

Effectiveness of in vitro procedures to estimate CP and amino acid digestibility coefficients in dried distillers grain with solubles by growing pigs

Pedersen, C., A. Pahm, and H. H. Stein. 2005. Effectiveness of in vitro procedures to estimate CP and amino acid digestibility coefficients in dried distillers grain with solubles by growing pigs. J. Anim. Sci. 83(Suppl. 2):39 (Abstr.) Link to abstract (.pdf)

Keywords: 
Amino acids, Digestibility, Amino acid digestibility, Distillers dried grains with solubles, In vitro, Crude protein
Authors: 
Pedersen, Pahm, Stein
Publication Type: 
Abstracts