EN
Biogenic amines occur in good, as well as in bad quality silages. The amounts of these eompounds are inversely correlated to the rate of lowering silage pH value. Wilting of forage crops and addition of formic acid (as an inhibitor) to ensiling are predominant factors decreasing level of biogenic amines. The impact of bacteriological and enzymatic preparations is much less. Lactic acid bacteria produce mainly tyramine and histamine while the Enterobacteria - putrescine and cadaverine. Biogenic amines influence dry matter intake by the animals, but their effect is predominantly depended on the irquantities in animal feeds, and on biogenic amine level in the rumen, what is relevant to their degradation in the animals' rumen adapted to an amine rich diet. The influence of only biogenic anlines per se at to-pharyngeal (palatability), and at the rumen levels, due to amine degradation by microorganisms, is rather small. Probably some other chemical compounds - both these formed during fermentation in silo as well as these formed in the rumen, influence the pattern and daily dry matter intake.