The solution of the utility model relates to the apparatus mounted on the frame of the silage compactor for a more effective application of silage additives. If a frame is mounted on the silage compactor, which will carry barrels, or bigger container with preservator, and a suitable applicator, the silage additives (bulk or liquid) may be applied under wheels of the silage compactor. It is a new method of the application of preservation additives, which ensures better aerobic stability of silage, especially maize, which is susceptible to aerobic degradation, especially in hot and humid weather.