Effects of ruminal PH and feed intake on defaunation in sheep fed high concentrate diets;Efeitos do PH ruminal e ingestäo alimentar na defaunação em ovinos sob rações concentradas

Revista Brasileira de Zootecnia

Volumn 25, Issue 6, 1996, Pages 1207-1215

  Franzolin, Raul ^a   Dehority, Burk A ^b  

^a UNIVERSITY OF SÃO PAULO   (Brazil)

^b OHIO STATE UNIVERSITY   (United States)

Author keywords

Defaunation; Fauna; Intake; pH; Protozoa; Rumen

Indexed keywords

EID: 0346574667     PISSN: 01004859     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (14)

1. BIRD, S.H., LENG, R.A. The effect of defaunation of the rumen on the growth of cattle on low-protein high-energy diets. Brit. J. Nutr., London, v.40,n.1,p.163-167, 1978.
2. CHRISTIANSEN, W.C., KAWASHIMA, R., BURROUGHS, W. Influence of protozoa upon rumen acid production and liveweight gains in lambs. J. Anim. Sci., Champaign, v.24,p.730-734, 1964.
3. CROWFORD JR., R.J., HOOVER, W.H., KNOWLTON, P.H. Effect of solids and liquid flows on fermentation in continuous cultures. I. Dry matter and fiber digestion, VFA production and protozoa numbers. J. Anim. Sci., Champaign, v.51,n.4,p.975-985, 1980.
4. DEHORITY, B.A. Laboratory manual for classification and morphology of rumen ciliate protozoa. Florida: CRC Press, Inc.1993, 96p.
5. DEHORITY, B.A. Rumen protozoology. Wooster: OARDC/OSU, 1991.276p.
6. HUNGATE, R.E. The rumen and its microbes. London: Academic Press Inc., 1966,533p.
7. JOUANY, J.P. Defaunation of the rumen. In: JOUANY, J.P. Rumen microbial metabolism and ruminant digestion Paris: INRA Editions, p.239-261, 1991.
8. KREIKEMEIER, K.K., HARMON, D.L., BRAND JR., R.T., et al. Steam-rolled wheat diets for finishing cattle: effects of dietary roughage and feed intake on finishing steer performance and ruminal metabolism. J. Anim. Sci., Champaign, v.68,p.2130-2141, 1990.
9. NAGARAJA, T.G., TOWNE, G., BEHARKA, A.A. Moderation of ruminai fermentation by ciliate protozoa in cattle fed a high-grain diet. Appl. Environ. Microb., Washington, v.58,n.8,p.2410-2414, 1992.
10. OWENS, F. Roughage sources and levels in finishing diets for feedlot cattle. In: GREAT PLAINS CATTLE FEEDERS CONFERENCE, Manhattan, 1987. Proceedings... Kansas State Univ., p.68-80
11. PURSER, D.B., MOIR, R.J. Ruminal flora studies in the sheep. IX. The effect of pH on the ciliate population of the rumen in vivo. Austr. J. Agr. Res., Melbourne, v.10,p.555-564, 1959.
12. VAN SOEST, P.J. Nutritional ecology of the ruminant. 2.ed.Corvallis:O & B Books,Inc.,1983,374p.
13. VEIRA, D.M. The role of ciliate protozoa in nutrition of the ruminant. J. Anim. Sci., Champaign, v.63,n.5,p.1547-1560, 1986.
14. WILLIAMS, A.G., COLEMAN, G.S. The rumen protozoa. New York: Springer-Verlag New York Inc.,1992,423p.