Combined analysis of tall fescue steer grazing studies in the Eastern United States.

R. W. Thompson, H. A. Fribourg, J. C. Waller, W. L. Sanders, J. H. Reynolds, J. M. Phillips, S. P. Schmidt, R. J. Crawford, V. G. Allen, Dan B Faulkner

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The mixed-models procedure (MMP) was used to analyze pooled data sets from 12 independent studies conducted during the last 13 yr at nine locations in seven states to provide combined estimates of daily gains by beef steers (Bos taurus) grazing tall fescue (Festuca arundinacea Schreb.) pastures free of (E-) or infested (E+) at different levels with the endophytic fungus Acremonium coenophialum. Treatments included low-infestation (< or = 5% E+), moderate-infestation (> or = 20 to < or = 35% E+), and high-infestation (> or = 50 to < or = 97% E+) tall fescue pastures, and, in tall fescue-clover (Trifolium spp.) mixtures, pastures at the same E+ levels with approximately 25 and 10% clover in spring and summer stands, respectively. Spring, summer, and combined spring+summer data were analyzed separately. The MMP permitted estimation of the fixed effects of treatments over a broad inference space of future years and different tall fescue pastures over a wide geographic range; detected relationships that had not been apparent in the individual studies, such as the interactions between clover presence and E+ infestation levels; and provided a more coherent body of information than did the results obtained from each discrete study. Logistical and financial constraints that force undesirable compromises in the conduct of future grazing and other expensive or time-consuming research may be avoided by using MMP within the context of cooperative projects.

Original languageEnglish (US)
Pages (from-to)1940-1946
Number of pages7
JournalJournal of Animal Science
Volume71
Issue number7
StatePublished - Jul 1993
Externally publishedYes

Fingerprint

Medicago
Eastern United States
Festuca arundinacea
grazing
pastures
Festuca
Acremonium
Trifolium
summer
Epichloe coenophiala
Fungi
beef cattle
cooperatives
Research
fungi
cattle

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Thompson, R. W., Fribourg, H. A., Waller, J. C., Sanders, W. L., Reynolds, J. H., Phillips, J. M., ... Faulkner, D. B. (1993). Combined analysis of tall fescue steer grazing studies in the Eastern United States. Journal of Animal Science, 71(7), 1940-1946.

Combined analysis of tall fescue steer grazing studies in the Eastern United States. / Thompson, R. W.; Fribourg, H. A.; Waller, J. C.; Sanders, W. L.; Reynolds, J. H.; Phillips, J. M.; Schmidt, S. P.; Crawford, R. J.; Allen, V. G.; Faulkner, Dan B.

In: Journal of Animal Science, Vol. 71, No. 7, 07.1993, p. 1940-1946.

Research output: Contribution to journalArticle

Thompson, RW, Fribourg, HA, Waller, JC, Sanders, WL, Reynolds, JH, Phillips, JM, Schmidt, SP, Crawford, RJ, Allen, VG & Faulkner, DB 1993, 'Combined analysis of tall fescue steer grazing studies in the Eastern United States.', Journal of Animal Science, vol. 71, no. 7, pp. 1940-1946.
Thompson RW, Fribourg HA, Waller JC, Sanders WL, Reynolds JH, Phillips JM et al. Combined analysis of tall fescue steer grazing studies in the Eastern United States. Journal of Animal Science. 1993 Jul;71(7):1940-1946.
Thompson, R. W. ; Fribourg, H. A. ; Waller, J. C. ; Sanders, W. L. ; Reynolds, J. H. ; Phillips, J. M. ; Schmidt, S. P. ; Crawford, R. J. ; Allen, V. G. ; Faulkner, Dan B. / Combined analysis of tall fescue steer grazing studies in the Eastern United States. In: Journal of Animal Science. 1993 ; Vol. 71, No. 7. pp. 1940-1946.
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