Silage making is one of the main conservation methods that is used in forage preservation (Muck, 1993b and Cassida, et al. 1994). Application of silage additives is the most important factor in improving silage quality (Muck, 1993a). Canola is one of the crops that produce throughout the world. Since, canola could not reach to stage of blossom in some climates such as cold climate, so farmers should mow and making silage for animal nutrition. The objective of present study was to determine the effects of different additives on chemical composition of whole crop canola silage.

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