<b><em>In Situ</em> degradability of energetic and proteic feeds and of <em>Brachiaria decumbens</em> in different vegetative growth</b> - DOI: 10.4025/actascianimsci.v25i2.2077

Abstract

The kinetics degradation and effective degradability (ED) of dry matter (DM), neutral detergent fiber (NDF) and crude protein (CP) were evaluated in corn and cobs with husks (CCH), soybean hulls (SH), cottonseed meal (CM) and Brachiaria decumbens (Signalgrass). They were collected from July to November. Three cows of 500kg BW were used. The incubation periods were 3, 6, 12, 24, 48, 72, 96 hours, for concentrated feeds and up to 120 hours for Signalgrass. The values of ED at 5%/h of DM, NDF and CP were respectively 45.72%, 15.80% and 55.04% for CCH; 43.96%, 33.99% and 51.85% for SH, 51.91%, 33.38% and 63.24% for CM. DM and NDF ED at 5%/h of Signalgrass were not different (P > 0.05) in the period, with average of 25.57% and 13.97%, respectively. For CP, ED at 5%/h in July and August (41.28%) were lower (p < 0.05) than October and November (50.50%).