Effect of protein-energy supplementation in in situ ruminal degradability of NDF and OM of star grass (Cynodon nlemfuensis) in Bubalus bubalis buffalo calves
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Abstract
rate of degradation of NDF (0.018, 0.027, 0.029, and 0.030 Fraction h-1) and the decline of the colonization time or ?lag? phase (2.8, 2.2, 2.1, 2.0 h) for the treatments with 0, 3, 6, and 9 g kg LW-1, respectively. However, the rate of OM degradation was higher in the treatments with supplementation (2.8, 2.6, 2.2), for 9, 6, 3 g kg LW-1 with respect to the treatment without supplementation (1.9). The effective degradability was higher in the treatments with supplementation, compared with the control, for NDF and OM in the forage. Multiple regression equations were established to describe the process of degradation of DM, NDF, and OM, in respect to the NDF N-1 consumed in the diet and the time (t) in the rumen. The results proved the positive effect of the supplementation with increasing amounts of concentrate, up to 9 g kg LW-1 in the diet of buffalo calves fed star grass. This could contribute to the increment of the productive activity in buffalo calves
under the current rearing conditions.
Key words: bufalipso buffalo calves, effective degradability, protein-energy concentrate.
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