## 3 Results and Discussion
[PERSON] [9] reviews that sorbate, benzoate, and acetic acid are ingredients of commonly sold antifungal additives, but are too expensive to be used in high concentrations as a pure additive. Like the CHEM treatment, treatments B1 and B2 did not undergo reheating. This means that the biological additives were also able to successfully prevent silage from aerobic reheating. These observations are also obvious and can be proved by statistical significance. Moreover, the findings of [PERSON] [10] showed prolonged aerobic stability by using _Lactobacillus buchneri_ as an inoculant. Just as in the CHEM treatment, it could be observed in treatment B1 and B2 that higher bulk density had no additional positive effect on the reduction of temperature. The results of the temperature measurement are graphically represented in the lower part of Figure 2 for the treatments B1 and B2. An important particularity of treatments B1 and B2 is that the temperatures measured by sensor 2 in the LD and the HD variation, and in both treatments treated with biological inoculant (B1 and B2), are higher than the temperatures measured by the other sensors within the same treatments. This means that an activity occurred in the middle part of the buckets treated with biological inoculants (B1 and B2). Consequently, it can be assumed that an energy-consuming process independent of air influence takes place in the buckets treated with biological silage additives. A possible explanation for  
Figure 4: Means of gas concentrations of samples taken from buckets of the chemical treatment at two sampling points (A and B); CHEM = silage treated with chemical additive, HD = high density, LD = low density. this phenomenon is the particularity that there is significantly more alcohol, especially 1,2-propanoliol and 1-propanol, in the silages treated with the biological additives (cf. Table 1). Table 1 also shows that the ethanol concentrations are higher in silages treated with the biological inoculants. The parameter ethanol concentration is additionally influenced by density. Results from the gas measurement shown in Figure 5 (treatment B1) and in Figure 6 (treatment B2) underline these outcomes. This comes along with the findings of [PERSON] et al. [21], who investigated the effects of microbial inoculants on corn silage fermentation, microbial contents, aerobic stability, and milk production under field conditions. For their investigation, [PERSON] et al. [21] used two different inoculants, one containing _Lactobacillus buchneri_ as a heteroformative strain, which was also included in treatments B1 and B2 of the present study. [PERSON] et al. [21] found an increase in pH, acetic acid content, propionic acid, propanol, propyl acetate, 2-butanol propylene glycol, ammonia, and free amino acids using this additive. Although not all of these parameters have been measured in the trial at hand, the results concerning propanol and acetic acid, and an increase of aerobic stability, fully correspond with [PERSON] et al. [21], as can be seen in Table 1.  
In their study mentioned above, [PERSON] and [PERSON] [3] also used biological inoculants containing _Lactobacillus buchneri_ and _Lactobacillus plantarum_. They found lower concentrations of lactic acid in all of their treated silages compared to the untreated variation, as is also shown by Table 1 in the present study. [PERSON] and [PERSON] [3] also found higher concentrations of acetic acid in silages treated with a high concentration (1 \(\times\) 10\({}^{6}\) cfu/g) of _Lactobacillus buchneri_. The findings of the present study support these results (cf. Table 1). As Table 1 show, the amount of acetic acid in silage treated with the biological additives is additionally influenced by density. Lower density increased the content of acetic acid significantly (cf. Table 1). Figure 5: Means of gas concentrations of samples taken from buckets of treatment B1 at two sampling points (A and B); B1 = silage treated with biological inoculant 1, HD = high density, LD = low density.