[Studies in fattening bulls on the regulation of phosphorus requirements by ad libitum intake].

Experimental studies into 21 fattening bulls have failed to support the assumption that phosphorus demand might be regulated by ad-libitum intake. A group feeding on lowphosphorus diet was compared to a normally fed control group. Both did not differ from one another regarding consumption of a high-phosphorus mineral mixture. Economically unjustifiable luxurious consumption rather must be expected, depending on taste, habit, and social eating behaviours.