Abstract: [Objective] The aim of the present study was to understand the mycotoxin contamination of common feed and feed raw materials in large-scale sheep farms in Linquan County, Anhui Province. [Method] A total of 55 samples of 8 types of feed or feed raw materials were collected from 22 large-scale sheep farms with populations over 500 heads in Linquan County, Anhui Province, including 2 soybean meal samples, 6 wheat and wheat bran samples, 10 corn samples, 2 soybean hull samples, 13 lamb concentrate supplement samples, 8 mutton sheep concentrate supplement samples, 7 fattening sheep complete formula feed samples, and 7 sheep farm self-formulated feed samples. The contents of aflatoxin B₁ （AFB₁）, zearalenone （ZEN） and deoxynivalenol （DON） in the collected samples were determined using fluorescence quantitative detection method. The detection rates and exceeding rates of the three kinds of mycotoxins in the different types of samples were calculated. [Result] The overall detection rates of AFB₁, ZEN and DON in the 55 feed and feed raw material samples were 50.90%, 56.36% and 69.09%, respectively, and the overall exceeding rates were 7.27%, 5.45% and 5.45%, respectively. In the detection of AFB₁, 5 types of samples were positive, among which the detection rate of mutton sheep concentrate supplement was the highest （75.00%）; lamb concentrate supplement and mutton sheep concentrate supplement exceeded the standard, with exceeding rates of 15.38% and 12.50%, respectively; corn had the highest detection value of 53.5 μg/kg. In terms of ZEN detection, 6 types of samples were positive, among which the detection rate of lamb concentrate supplement was the highest （76.92%）; wheat and wheat bran, lamb concentrate supplement and mutton sheep concentrate supplement exceeded the standard, and the exceeding rates were 16.67%, 7.69% and 12.50%, respectively; the detection value of mutton sheep concentrate supplement was the highest, at 1 120 μg/kg. As for the detection of DON, 6 types of samples were positive, among which corn had the highest detection rate （90.00%）; lamb concentrate supplement exceeded the standard, with an exceeding rate of 23.08%, and the other samples did not exceed the standard; the detection value of mutton sheep concentrate supplement was the highest, at 2 950 μg/kg. Non of the three kinds of mycotoxins were detected in soybean meal and soybean hull. [Conclusion] The mycotoxin contamination in feed and feed raw materials in sheep farms in Linquan County is relatively serious, and the prevention and control of mycotoxin contamination need to be further strengthened.

Key words: feed, feed raw material, aflatoxin B₁, zearalenone, deoxynivalenol