A recent field study of fresh chop corn silage shows that waiting for that last 3 to 5 percent of starch fill may not be worth it — especially if you intend to feed that silage to lactating dairy cows. As the plant matures and kernel starch fill continues, the rumen digestibility of the starch decreases, explains Dr. David Weakley, director of forage research for Calibrate Technologies. In dairy cows, when the amount of rumen degradable starch is less than expected, milk production can suffer. In addition to lower rumen digestibility, more mature starch also means that kernel processing may not be as effective. That, in turn, could further decrease the amount of starch that is available to the cow.
This report appears in the January 2015 issue of Acres U.S.A.