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

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal 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 Lemenager, R. P. Articles by Totusek, R. Search for Related Content PubMed Articles by Lemenager, R. P. Articles by Totusek, R.

Monensin Effects on Rumen Turnover Rate, Twenty-Four Hour VFA Pattern, Nitrogen Components and Cellulose Disappearance^1,2,

Oklahoma Agricultural Experiment Station, Stillwater 74074

Abstract

The effect of monensin on forage intake, rumen turnover rates, 24-hr volatile fatty acid patterns, rumen nitrogen components, in vitro dry matter disappearance and in vivo cellulose disappearance rate was examined in two trials.

Forage intake of eight steers ad libitum fed harvested dry winter range grass was 16% lower (P<.02) when 200 mg monensin was added daily, and liquid and solids turnover rates were 31% (P<.10) and 44% (P<.01) slower, respectively, when monensin was fed. Rumen liquid volume was reduced (P<. 10) when monensin was fed, but total rumen dry matter was not affected (P<. 10). Monensin at 50, 100 and 200 mg/day added to a limit-fed concentrate ration linearly (P<.05) depressed fluids turnover.

Addition of monensin to in vitro fermentation flasks depressed IVDMD of harvested range grass with inocula from both control and monensin adapted steers, with depression greater with inocula from control steers. Peptide and alpha-amino nitrogen levels in rumen fluid of forage fed steers and in vivo cellulose disappearnce estimated with cotton fiber strips in concentrate fed steers were not significantly altered by monensin feeding.

¹ Journal Article 3389 of the Agricultural Experiment Station, Oklahoma State University, Stillwater.

² The research reported herein was partially supported by a grant from Lilly Research Laboratories, Division of Eli Lilly and company, Greenfield, IN.

³ Present address: Department of Animal Sciences, Purdue University, West Lafayette, IN 47907.

⁴ Department of Animal Science.

This article has been cited by other articles:

				L. O. Tedeschi, D. G. Fox, and T. P. Tylutki Potential Environmental Benefits of Ionophores in Ruminant Diets J. Environ. Qual., September 1, 2003; 32(5): 1591 - 1602. [Abstract] [Full Text] [PDF]

				T. Mutsvangwa, J. P. Walton, J. C. Plaizier, T. F. Duffield, R. Bagg, P. Dick, G. Vessie, and B. W. McBride Effects of a Monensin Controlled-Release Capsule or Premix on Attenuation of Subacute Ruminal Acidosis in Dairy Cows J Dairy Sci, December 1, 2002; 85(12): 3454 - 3461. [Abstract] [Full Text] [PDF]