Sachsische Landesanstalt fur Landwirtschaft

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PubMed | Sachsische Landesanstalt fur Landwirtschaft
Type: Journal Article | Journal: Mycotoxin research | Year: 2013

Maize for silage purposes is investigated on Zeralenone (ZEA) and Deoxynivalenol (DON) in Saxony since 1997. About 45 samples from various regions of Saxony are analyzed every year. The occurrence of DON and ZEA was proved for 20 to 90% of all samples. Most of the samples showed both of these toxins. The quantity of the detected toxins was generally very low, even in so called Fusarium years only 20% of samples exceeded the lowest border of orientation values for critical dietary concentrations in cattle feed. We observed a higher contamination with DON in samples from the region Erzgebirge and clear higher contents of ZEA in the region Schsisches Heideland. Correlation between toxin content and other parameters like cultivation, pre-fruit etc. were not observed, probably because of masking these effects by variety and location.


PubMed | Sachsische Landesanstalt fur Landwirtschaft
Type: Journal Article | Journal: Mycotoxin research | Year: 2013

By means of a modelling experiment we followed the fate of deoxynivalenol (DON) and zearalenone (ZEA) in the production of bioethanol from grain.The experiment has been performed at the Versuchs- und Lehranstalt fr Brauerei in Berlin e.V. A total of 33 kg. triticale with a concentration of 3.2 mg/kg DON and 0.035 mg/kg ZEA were treated with water and enzymes which yielded the mash. By adding yeasts the mixture was then brought to formentation. Finally, the alcohol was obtained by destillation.The residue was dried by centrifugation to a content of 25% dry matter and put in silage tubes. In each part of the whole process test samples were taken and the content of DON and ZEA was determined. After three month the silage was scraped out from the tubes and analyzed, too. The mycotoxins were analyzed by HPLC with DAD and HPLC with fluorescence detection, corresponding to VDLUFA-methods.The balance of the mycotoxin contents showed no loss of DON in the process. For ZEA, however, a deficit of about 35% was noted. Because of the mass loss during starch fermentation (33 kg grain yield 8 kg draff) the mycotoxin contents were enhanced by a factor of 2 to 4.DON is well dissolved in water and therefore partially washed out by filtration of the mash. As the whole process is performed in practice as a cycle, the filtrate with DON is permanently recycled in the brewery process. Therefore the mycotoxin concentration in the original grain should not exceed the legal EU boundary values of 1.25 mg/kg DON and 0.1 mg/kg ZEA.

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