## 3 Results and Discussion  
### Silage Characteristics  
The quality of silage prepared in the respective variants was evaluated based on the following parameters: total content of dry matter (DM), crude proteins (CP), starch, lipids, neutral detergent fibre (NDF), acid detergent fibre (ADF), crude fibre (CF) and acid detergent lignin (ADL). These parameters were determined at the end of the ensiling process, i.e., after the ensiling vessels were opened. The highest content of dry matter (DM) was recorded in the M100 silage (33.6%) and was decreased with the decreasing proportion of maize in the silage to 30.6% in JA100. The value is nearly identical with that mentioned by [PERSON] [46]: 30.5%. A similar trend was also exhibited by the statistically significant differences between the respective silage variants. According to [PERSON] et al. [47], the content of DM is closely related to JA growth stages. The content of neutral detergent fiber (NDF) in the percent of DM ranged on average from 43.8% (M100) to 33.2% (JA100). Statistically significant differences were found among all five variants. This corresponds to the fact that according to NRC [48], the content of NDF in JA silages (43.9% of DM) is lower as compared with other silages, such as maize silage (45.0% of DM), barley silage (56.3%) and oat silage (60.6%). Nevertheless, some other authors declare mostly higher values in the JA, such as [PERSON] et al. [49] 38.8% and [PERSON] [46] 49.6%. [PERSON] [46] also claims that a significant decrease in the content of NDF and increased content of hemicellulose were recorded during the process of JA ensiling, which had a positive influence on the yield of methane. [PERSON] et al. [50] observed that the fiber content in mixed silages of maize and JA decreased with the increasing share of JA biomass in the mixture, while the degradability of NDF increased. A similar issue is being discussed in the fodder industry: the main source of fiber in folders is the cell wall of plants, which consists of cellulose, hemicellulose and the non-saccharide component of lignin; the nutritional availability of all nutrients then depends on the composition and structure of fiber, which affect its degradability and digestibility for ruminants [26]. The content of NDF in maize is claimed to be 42.1% by [PERSON] et al. [16], 47.3% and 38.6% by [PERSON] et al. [20] and 55.3% by [PERSON] et al. [49]. The NDF content is also related to the date of harvest. The content of ADF ranged on average from 27.81% (JA) to 21.14% (M) and the content of CF ranged on average from 19.81% (JA) to 16.82% (M). According to NRC [48], the average ADF values are higher--31.7% in JA and 28.1% in M, [PERSON] et al. [49] 30.3% in JA and 34.6% in M. Based on the research of nutritional and fiber composition of silages prepared from various crops in Germany, [PERSON] et al. [13] inform that the JA silage contained 44.1% of NDF and 39.6% of ADF. In these parameters (Table 4), determined differences were not so conspicuous as in NDF and their trend was opposite--the contents of ADF and CF decreased with the increasing share of maize; statistically significant differences were recorded between the JA100, M30+ JA70 and M50 + JA50 groups of variants and the variant of maize monoculture (M100) (Tables 4 and 5). The highest and lowest contents of starch were recorded in the variants M100 (16.1%) and JA100 (9.2%), respectively. Statistically significant differences were found among all five variants. The content of CP in the percent of dry matter ranged on average from 9.3% (M100) to 5.1% (JA100). Statistically significant differences were found among all five variants. In contrast, according to NRC [48], [PERSON] et al. [47] claim the CP content to be higher in JA (11.6% of DM) and lower in maize (8.8% of DM). [PERSON] et al. [49] recorded 10.5% in JA and 8.3% in maize. [PERSON] et al. [51] arrived at a value of 10.3% in JA.