HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Pell, A. N. Articles by Schofield, P. Search for Related Content PubMed PubMed Citation Articles by Pell, A. N. Articles by Schofield, P.

Computerized Monitoring of Gas Production to Measure Forage Digestion In Vitro

Department of Animal Science, Cornell University, Ithaca, NY 14853

The techniques reported in this paper were developed to facilitate the study of the kinetics of forage digestion in vitro by measuring gas production. Fiber disappearance as a measure of the reaction rate has been replaced by the use of computerized pressure sensors to monitor the gaseous products (CO₂, CH₄) of microbial metabolism. The recording system described requires a computer, pressure sensors, an interface card, and appropriate software to monitor gas production continuously. Several variables, including sample size, inoculum size, vessel size, and type of pressure sensor, have been investigated to determine ranges within which gas production can be measured accurately, and the reproducibility of the results has been established. Because this technique uses small (100-mg) samples, a modified NDF method has been introduced that allows determination of extent of digestion at the end of an incubation in which gas production has been monitored. A strong linear relationship existed between NDF disappearance and gas production.

This article has been cited by other articles:

				M. B. Hall and D. R. Mertens In Vitro Fermentation Vessel Type and Method Alter Fiber Digestibility Estimates J Dairy Sci, January 1, 2008; 91(1): 301 - 307. [Abstract] [Full Text] [PDF]

				J-S. Eun, V. Fellner, and M. L. Gumpertz Methane Production by Mixed Ruminal Cultures Incubated in Dual-Flow Fermentors J Dairy Sci, January 1, 2004; 87(1): 112 - 121. [Abstract] [Full Text] [PDF]

				B. L. Rueda, R. W. Blake, C. F. Nicholson, D. G. Fox, L. O. Tedeschi, A. N. Pell, E. C. M. Fernandes, J. F. Valentim, and J. C. Carneiro Production and economic potentials of cattle in pasture-based systems of the western Amazon region of Brazil J Anim Sci, December 1, 2003; 81(12): 2923 - 2937. [Abstract] [Full Text] [PDF]

				R. Ruiz, L. O. Tedeschi, J. C. Marini, D. G. Fox, A. N. Pell, G. Jarvis, and J. B Russell The Effect of a Ruminal Nitrogen (N) Deficiency in Dairy Cows: Evaluation of the Cornell Net Carbohydrate and Protein System Ruminal N Deficiency Adjustment J Dairy Sci, November 1, 2002; 85(11): 2986 - 2999. [Abstract] [Full Text] [PDF]