Influência do nitrogênio degradável no rúmen sobre a degradabilidade in situ, os parâmetros ruminais e a eficiência de síntese microbiana em novilhos alimentados com cana-de-açúcar1
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Data
2009
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Resumo
The objective of this work was to evaluate the ruminal degradable nitrogen (RDN) deficit using as
roughage sugar cane supplemented with urea, soybean meal, or corn gluten meal 60 on the microbial synthesis efficiency,
in situ dry matter (DM) and neutral detergent fiber (NDF) degradability. The treatments were: sugar cane, sugar cane with
urea, soybean meal or corn gluten meal 60. Eight rumen and duodenum cannulated steers were used and arranged according
to two 4 × 4 Latin Squares. The pH and N-NH3 were determined in the ruminal fluid before and 2, 4, 6 and 8 hours after
feeding. The duodenal flow was estimated by indigestible acid detergent fiber. The microbial efficiency was determined by
purine. RDN did not affect the DM and the highest effective degradability was observed in sugar cane supplemented with
soybean meal in the NDF degradability. The pH, N-NH3 values were appropriate to the microbial synthesis in all the
evaluated diets. The RDN deficiency did not affect the microbial protein synthesis and the dynamics of the liquid phase.
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Farelo de soja, Glúten de milho-60, Nitrogênio amoniacal, Purinas, Uréia, Ammonia nitrogen, Corn gluten meal, Purine, Soybean meal, Urea
Citação
SILVEIRA, Roselene Nunes da; BERCHIELLI, Telma Teresinha; CANESIN, Roberta Carrilho; MESSANA, Juliana Duarte; FERNANDES, Juliano José de Resende; PIRES, Alexandre Vaz. Influência do nitrogênio degradável no rúmen sobre a degradabilidade in situ, os parâmetros ruminais e a eficiência de síntese microbiana em novilhos alimentados com cana-de-açúcar. Revista Brasileira de Zootecnia, Viçosa, v. 38, n. 3, p. 570-579, 2009.