[In sacco degradability of grass silage and bacterial contamination of residues].

The in sacco degradability of wilted grass silage, harvested at 2 stages of maturity, and of direct cut silage was determined in 6 heifers. The date of cutting had a pronounced effect on ruminal degradation and bacterial contamination of the feed residues. On the contrary, wilting of the grass prior to ensiling did not influence these parameters.