Accumulation of mycotoxins in forage of winter pasture during prolonged utilisation of sward.
The concentration of mycotoxins in sward depending on time of pre-utilisation in summer and date of harvest in winter was analysed during the 2000-2002 vegetation seasons. Additionally, the yield of pasture sward was estimated. Higher concentrations of ochratoxin A--respectively: 0.55 and 050 ng/g DM--were found in the pasture sward harvested in December and January when compared to the sward collected in November (0.36 ng/g DM). The average concentration of zearalenone varied from 2.74 ng/g DM in December, to 6.00 ng/g DM in November and 9.77 ng/g DM in January. The highest concentration of ochratoxin A was 1.82 ng/g DM and zearalenone 47.89 ng/g DM. The highest number of samples in which ochratoxin A exceeded the level of 0.3 ng/g DM was noted in sward harvested in January (61.1%), while in the case of zearalenone, the number of samples containing this mycotoxin at a level exceeding 3.0 ng/g DM varied from 55.6% in December to 66.7% in November and January. It seems that the percentage of ochratoxin A positive samples and the toxin concentration level in the sward of winter pastures increased during the time of sward regrowth.
Goliński
P
P
Department of Grassland Sciences, August Cieszkowski Agricultural University, Poznań, Poland. pgolinsk@woodcock.au.poznan.pl
Kostecki
M
M
Golińska
B
B
Golińska
B T
BT
Goliński
P K
PK
D000821:Animal Feed; D000822:Animal Husbandry; D000818:Animals; D002417:Cattle; D005506:Food Contamination / Q000032:analysis*; D009183:Mycotoxins / Q000032:analysis*; D009793:Ochratoxins / Q000032:analysis; D006109:Poaceae; D011044:Poland; D012621:Seasons; D015025:Zearalenone / Q000032:analysis
D009183:Mycotoxins; D009793:Ochratoxins; C025589:ochratoxin A; D015025:Zearalenone