【摘要】 本试验选用12头黑白花杂交乳牛进行,饲喂20及50ppbB₁混合饲料后,奶中AF M1的平均含量为0.52及1.58ppb,摄入AFB₁量与奶中排出的AFM₁量呈非常显著的相关,两种剂量混合饲料其转化率为5.75％及7.01％,其差别有显著意义;停喂含AFB₁饲料五天后奶中检不出AFM₁;初步提出:混合饲料中AFB₁暂定为20ppb,鲜奶中AFM₁暂定为0.5ppb。更多还原

【Abstract】 This observation was carried out with twelve dairy cows （crossbred） which were divided into two groups and fed separately with a diet containing 20 and 50 ppb of Aflatoxin B₁. The secretion of Aflatoxin M₁ in milk was found to be 0.52 and 1.58 ppb （in average） respectively. The amount of Aflatoxin M₁ secreted was significantly related to the Aflatoxin B₁ administered. The rate of conversion of Aflatoxin B₁ was calculated to be 5.75% and 7.01% respectively, and the difference was considered to be significant. After stopping administration of the diet with Aflatoxin B₁ for five days no Aflatoxin M₁ was detected in milk. It is, thus, suggested that the content of Aflatoxin B₁ in mixed diet should be less than 20 ppb while the content of Aflatoxin M₁ in milk should be less than 0.5 ppb.更多还原