[The effect of thioglycoside-containing feed on the growth, thyroid hormone and thiocyanate status of swine and poultry].

Feed containing rapeseed meal (RSM) with high glucosinolate content (10 mmol/kg feed) induced a strong increase of thyroid weight in pigs and poultry. Supplementary iodine reduced the antithyroid effect, but, it could not cancel it. Only at a low glucosinolate content (0.7 mmol/kg feed) a normal weight of thyroid was established. As the iodine supplementation increased the serum T4 value increased. The thiocyanate serum level increased irrespective of glucosinolate content of the feed. The urine level was significantly decreased due to lower dietary glucosinolate level. Obviously, the goitrogenic effect of the RSM does not correlate with the increased thiocyanate serum level.