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Special Considerations for Silage Testing
Jan 09, 2010
By Sara Brown
At our farm, we are feeding our spring calving cows a corn silage and hay ration. Silage tests have an unique value that beef producers should understand—MILK2000. This is an index method that evaluates corn silage based on dry matter and energy content. The energy calculation is based on the amount and estimated digestibility of the crude protein, neutral detergent fiber (NDF), starch and non-starch components, and fat content of the corn silage sample. The NDF digestibility is estimated from an invitro measurement rather than a calculated lignin estimate.
MILK2000 is a good way to compare different corn silages because it includes two important factors—silage yield and nutrient availability.
Silage sampling. Silage nutrient content can vary widely from the top of the silo or pile to the bottom. If you are testing silage, it’s important to get a balanced sample, especially if you are also feeding hay or mineral.
To get as accurate a sample as possible, the best method for sampling corn silage from a bunker or pile is to use a face shaver. Cut into the face about 4” in three locations across the face. The shaved forage should then be mixed in the mixer wagon and then four to six handfuls of silage collected into a bucket, mixed and then take a final sample for analysis.
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