Silage covers are a critical part of ensuring a successful, high quality ensilage. The growth of mold and rapid spoilage of the final product is directly related to the presence of oxygen during fermentation as well as the silage's exposure to air during feedout. Impermeable plastic covers are used alone or with oxygen-barrier films to ensure that an anaerobic environment is preserved during fermentation.
During feedout, exposure to the air must also be limited to prevent the growth of molds and toxic bacteria. Clamping and completely covering the remaining silage between daily feedouts is the only way to prevent degradation and spoilage.
