<b>Ciliated protozoa in the rumen of cattle under different levels of undegradable protein diets</b> - DOI: 10.4025/actascianimsci.v25i1.2146

  • Maria Regina Coalho USP
  • José Carlos Machado Nogueira Filho USP
  • José Aparecido Cunha USP
  • César Gonçalves de Lima USP
DOI: https://doi.org/10.4025/actascianimsci.v25i1.2146

Abstract

The experiment was carried out at the Zootechny and Food Engineering Faculty of Universidade de São Paulo (São Paulo University - Brazil), and it aimed to study the pH variation and also to identify and to qualify the ciliated protozoa in the rumen of cattle under 24%, 30%, 36% and 42% of undegradable protein (PNDR) diets, named as treatments A, B, C and D, respectively. All the diets had the same protein and energy concentration (11% CP and 63% TDN), and they were composed of soybean meal, corn barley and sorghum grains, blood and meat meal, corn silage, limestone, salt and urea. Four crossbred European x Zebu steers, having a mean weight of 600kg and holding a rumen cannulae were utilized in a 4 X 4 Latin Square design, with four periods, each one containing 21 days of adaptation. On day 23 and 24 of each period, rumen fluid samples were taken for pH determination. The results showed that pH was affected by PNDR level, with significant difference of collection time after feeding (p < 0,05), and the presence of urea on diets A and B resulted in an intense ureal activity in the rumen, which stimulated the multiplication of ciliated protozoa of the genus Entodinium spp (p < 0,05).

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Author Biography

José Carlos Machado Nogueira Filho, USP
possui graduação em Medicina Veterinaria pela Fac Med Veterinaria e Zootecnia (1973) , graduação em Medicina Veterinaria pela Fac Med Veterinaria e Zootecnia (1973) , graduação em Medicina Veterinaria pela Fac Med Veterinaria e Zootecnia (1973) , mestrado em Nutrição Animal pela Universidade de São Paulo (1981) , doutorado em Ciências dos Alimentos pela Universidade de São Paulo (1985) e pos-doutorado pela Universidad de Zaragoza (1998) . Atualmente é professor titular da Universidade de São Paulo. Tem experiência na área de Zootecnia , com ênfase em Nutrição e Alimentação Animal. Atuando principalmente nos seguintes temas: Nutrição, búfalos, Zebú, Protozoários de rúmen, Degradabilidade Currículo Lattes
Published
2008-04-17
How to Cite
Coalho, M. R., Nogueira Filho, J. C. M., Cunha, J. A., & Lima, C. G. de. (2008). <b>Ciliated protozoa in the rumen of cattle under different levels of undegradable protein diets</b&gt; - DOI: 10.4025/actascianimsci.v25i1.2146. Acta Scientiarum. Animal Sciences, 25(1), 193-199. https://doi.org/10.4025/actascianimsci.v25i1.2146
Issue
Vol 25 No 1 (2003)
Section
Animal Science

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