Abstract
This study will evaluate the effects of providing a ²-adrenergic agonist in muscle growth and adipose tissue of Nellore bulls and steers. 120 animals will be used Nellore males, 60 castrated and non-castrated 60, with average live weight of 385 kg, and from recreates in continuous grazing. The experiment will be fully randomized divided into two tests: Test 1: Castrated animals were divid…