Performance e rendimento de carcaça das raças Nelore e Angus submetidas à terminação em confinamento

Abstract

The production of beef cattle in Brazil, in relation to the world, has a great advantage in relation to the climate, because, due to being located in the tropics, it is possible to use the grazing livestock modality during the whole period of the year. However, although this model is viable, many producers choose to use the confinement system to raise their animals, due to the shorter time required to finish them. Thus, the number of animals confined has been growing and becoming popular among Brazilian farms. The containment system offers advantages for the termination of animals as it reduces the time from this phase until slaughter. In view of this, the following work aimed to analyze the performance of confined animals of two different breeds, using zootechnical indexes of average daily weight gain and carcass yield as a basis. For this purpose, 240 animals were confined, 120 of the Nellore Zebu breed and another 120 of the British breed Angus, in the months of June to October, in the Elite private confinement in the city of Capinópolis, Minas Geris, being known Nelores 120 days and Angus 105. Both breeds received similar conditions of food and environment, such as diet, temperature, location. The variables analyzed were: average daily weight gain, where the initial and final animals were used to perform the calculations; as for carcass yield, the values obtained were passed to the confinement partner refrigerator, where the animals were slaughtered. With the realization of this experiment, it was possible to obtain that even the Nellore breed showing itself slightly superior in relation to the carcass yield, the animals As for the average daily weight gain, the Angus are differentiated more efficient, since they gained approximately 28% more per day, per head. Therefore, it is ideal for the owner to analyze the most viable possibilities according to the reality and objectives of his property, facilitating his decision making.