| 摘要 |
A feedstuff supplement comprising urea or a derivative thereof as a source of nutritive nitrogen and a compound selected from the group consisting of orotic acid and derivatives of orotic acid of the formula <IMAGE> wherein R1 and R2 are independently hydrogen, alkyl, glucosyl or ribosyl, in a minor proportion for increasing the assimilation of urea by herbivorous animals, and a vegetable based feedstuff containing the supplement. |
