Uticaj provenjavanja i stepena sabijenosti na parametre hemijskog sastava, proteolize i kvaliteta silaže lucerke / The influence of wilting and compaction degree on parameters of chemical composition, proteolysis and quality of lucerne silage
2013
Đorđević, N. (Poljoprivredni Fakultet, Beograd-Zemun (Srbija)) | Grubić, G. (Poljoprivredni Fakultet, Beograd-Zemun (Srbija)) | Stojanović, B. (Poljoprivredni Fakultet, Beograd-Zemun (Srbija)) | Radivojević, M. (Poljoprivredna Korporacija Beograd, Beograd-Padinska Skela (Srbija)) | Božičković, A. (Poljoprivredni Fakultet, Beograd-Zemun (Srbija))
The influence of wilting, actually two levels of dry matter content (DM = 250 and 360 gkg-1) and three levels of compaction (460, 550 and 620 gdm-3) on variations in parameters of chemical composition, proteolysis and quality of lucerne silage was investigated. The experiment was set as 2×3 factorial with three replications per each treatment. Based on the results of chemical analysis, there was no significant variation within the contents of basic nutrients (p>0.05), while some variation was observed in lipid and carbohydrate contents. In silages with higher dry matter content the reduction of fermentation was observed, with acetate as dominant product in acid contents in A2B1 treatment, and also reduction in proteolytic processes which shows as lower ammonia and soluble nitrogen content (p<0.05). With the increase of level of compaction the increase in lactic acid was observed, with decrease in ammonia and soluble nitrogen (p<0.05). In material with natural moisture content, regardless of the level of compaction, the butyric fermentation was observed and intensified aminogenesis. On the basis of this investigation it can be concluded that wilting and adequate compaction are the key physical factors which influence silage quality parameters.
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