The excretion by sheep of75selenium incorporated into red clover (Trifolium pratenseL.): The chemical nature of the excreted selenium and its uptake by three plant species

摘要

Data are pr~sented on the excretion of radioactive selenium by 2 sheep fed on red clover grown in nutrient solutions containing75Selenite ion. The clover contained a total of 6.1 p.g of selenium, which was predominantly incorporated in protein. The major part of the radioactivity was excreted in the faeces, 53.8 per cent and 53.6 per cent being recovered within 99 hr for 2 sheep, while the corresponding urinary values were 1.78 per cent and 2.29 per cent respectively. The peak of excretion occurred approximately 20 hr after feeding, although75Se was still being excreted 14 days after commencement of the experiment.