The presence of excessive oxygen during any stage of ensiling can destroy the quality of the finished product, so many producers protect their investment by installing oxygen barrier film under the primary silage covers. These films are thin and stretchy, somewhat like cling wrap, and can create a tight, form-fitting cover over the surface of the silage. This tight cover eliminates troublesome air pockets.
Oxygen barrier films are single use and don't provide adequate protection to silage on their own. Covers protect from heat generated by the sun, from tears caused by excessive winds and punctures from wind-blown detritus. Covers also divert water from the surface of the silo and allow it to drain to an appropriate collection point. While oxygen barriers provide an important benefit to the ensilage process, durable covers are still necessary.
