Abstract

MARTINEZ, E.V.; SLANAC, A.L.  and  KUCSEVA, C.D.. Resultados de la amonificación con urea sobre la degradabilidad ruminal de Hemarthria altissima y Cynodon nlemfuensis en bovinos. Rev. vet. [online]. 2016, vol.27, n.2, pp.93-97. ISSN 1669-6840.

The objective was to evaluate the effect of adding urea on the degradability of the dry matter in hays Hemarthria altissima cv. bigalta (grass carnation) and Cynodon nlemfuensis (star grass). At the Experimental Station INTA (Colonia Benítez, Chaco, Argentina), between march 2011 and march 2012, samples of plant material were obtained, dehydrated and ammonified with different percentages of urea (0; 2; 4; 6), according to the technique of "in situ suspension" proposed by Orskov et al. (1980). Aliquot of grass were introduced into the rumen of four steers zebu (3,5 years old, 420 kg liveweight) with rumen cannula in the left flank, also is calculated effective degradability using the equation by the same authors to estimate the kinetics of digestion of dry matter. The kinetics of degradation carnation grass showed no statistical difference. However in star grass, it was observed differences for the degradability rate of 4 (0.01) and 2 (0.02), presenting a quadratic and cubic effect in both cases.

Keywords : cattle; urea ammoniation; degradability; Hemarthria altissima; Cynodon nlemfuensis.

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