When selecting which hybrids you want to use for corn silage, here is a good rule-of-thumb to remember:
Each time in vitro neutral detergent fiber digestibility (dNDF) goes up 1 percentage point, you get a 0.37-pound increase in dry matter intake and a 0.55-pound increase in daily milk production per cow. So, if one hybrid’s dNDF is 8 percentage points higher than another, it could mean a 4.4-pound difference in milk per cow per day.
Those are benchmark numbers from a March 1999 Journal of Dairy Science article from researchers at Michigan State University.
Get more energy out of the fiber portion of your ration rather than relying on concentrates.