Improving in sacco incubation technique to evaluate starch degradability of fresh and fermented corn silage for ruminants

摘要

Corn silage is the main forage fed to ruminants and represents the most important energetic supply to animals of high level of production (dairy cows and fattening animals). Global methods to predict organic matter digestibility of corn silage were developed in the 1990's (Aufrere etal, 1992). To improve the understanding and the prediction of corn energetic substrates degradation in the rumen, one problem lies in the lack of reference method to evaluate the rate and extent of corn silage starch degradation in the rumen. This issue could lead to errors in the choice of feed supplements in diet formulation. The aim of the present experiment was to determine the most adapted experimental in sacco procedure among current in sacco incubation technique to evaluate degradability of fresh corn and com silage.