The effect of biological preservatives, treatment and different levels of dry biomass on proteolysis and content of biogenic amines in alfalfa silage
2000
Jambor, V. (Vyzkumny Ustav Vyzivy Zvirat, Pohorelice (Czech Republic))
The effect of preservatives (formic acid and Bactozyme) and chops length on proteolysis and content of biogenic amines was studied in alfalfa silages with different dry matter contents (25 %, 35 %, 45 % and 55 %). Greatest changes in the parameters under study were observed in alfalfa silage with 25 % dry matter content. The effect on the degree of proteolysis and content of biogenic amines decreased with increasing dry matter contents. While proteolysis was inhibited by short chops (6 mm) in alfalfa silages, the content of biogenic amines in control variant and in Bactozyme - treated variant increased. Average content of biogenic amines was at the same level in the variant treated with formic acid, but their content was lower (185.0 mg/kg) at 25 % dry matter in alfalfa silage with short chops in comparison with silage made from long chops (346.0 mg/kg). The content of biogenic amines decreased in relation to increasing dry matter contents and type of preservative. Tyramine accounted for the highest proportion in the total content of biogenic amines in alfalfa silage (ca. 65 %).
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