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Abstract
Over a period of 2 years from 1982 to 1984, six feeding trials were carried out on a total of 307 Friesian bulls to investigate the effects of energy and protein levels in compound feed. All animals were fed ad-lib compound diets with free access to barley straw and water. In four of the six trials the bulls were implanted with Ralgro (zeranol, Crown Chemical Company Limited), once at the start of the trial and again after 90 days. The various dietary treatments in the different trials are given below. Theoretical undegradable dietary protein was calculated using the known degradability of raw materials in the compound feed.
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Schedule a callMore From: Proceedings of the British Society of Animal Production (1972)
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