Evaluation of nutritional quality, mycotoxins content and ensiling process of Bt maize after artificial inoculation with selected Fusarium strains
2009
Krizova, L.,Agrovyzkum, Rapotin (Czech Republic) | Svobodova, J.,Agrovyzkum, Rapotin (Czech Republic) | Richter, M.,Agrovyzkum, Rapotin (Czech Republic) | Dolezal, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic)
The objective of this study was to evaluate the effect of artificial inoculation of Bt maize with selected Fusarium strains on nutritive value, mycotoxins content and ensiling process. The inoculation was made in the growing crop in milk stage of maturity after harming the cops and stalks with a wire brush. Entire maize plants were harvested at the soft dough stage of maturity, ensiled in microsilage tubes and fermented at 25 deg C for 90 days. Dry matter and crude fibre concentrations were lower in untreated than in treated plants (318.2 g/kg vs. 353.8 g/kg and 176.6 g/kg vs. 191.9 g/kg, respectively). Crude protein concentration was higher in untreated than in treated forage (81.6 g/kg vs. 73.6 g/kg). Artificial inoculation resulted in significantly higher concentration of deoxynivalenol in treated than in untreated plants (390 ng/kg vs. 79.9 ng/kg). Dry matter concentration was significantly lower (309.9 vs. 330.3 g/kg) and crude protein conc. significantly higher (86.7 vs. 82.6 g/kg) in untreated than in treated silage. The inoculated silage also had a higher degree of proteolysis (8.45 vs. 7.74%) and contained significantly higher levels of DON (473.9 vs. 202.8 ng/kg) and fumonisins (246.7 vs. 130.23 ng/kg).
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