Post-weaning nelore cattle grazing Brachiaria brizantha with protein supplement or free access to a protein bank of Leucaena leucocephala: animal performance

Revista Brasileira de Zootecnia

Lourenço, Antônio João²  Manella, Marcelo Queiroz¹  Leme, Paulo Roberto³ 

[1] Instituto de Zootecnia, Nova Odessa;USP, Pirassununga

关键词: average daily gain;    beef cattle;    escape protein;    feed supplement;    protein bank;    grazing;    wet season   IntroduçãoO Brasil conta com o segundo maior rebanho do mundo;    estimado em 151 milhões de cabeças;    com o abate de 29 milhões de cabeças bovinas;    produzindo um montante de 6;    67 milhões de toneladas de equivalente carcaça;   

DOI  :  10.1590/S1516-35982002000900016

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The performance of 192 weaned Nelore steers grazing on Brachiaria brizantha pastures(Teste), or supplemented during the dry season (Seca), all year around (Ano) or with free access to a leucaena bank (Banco), was evaluated in a random block design with four replications. The dry season supplement had 46.9% CP, 70% rumen degradable, and the wet season supplement, 43.9% CP, 60% degradable. During the dry season, the animals of Ano and Seca showed higher gains than Banco and Teste (.534 and .486 vs .277 and .201 kg/day, respectively). In the wet season animals on Ano and Bank had higher gains than Seca and Teste (.782 and .741 vs .584 and .645 kg/day). The live weight gain per unit of area showed the same behavior of daily gain. Supplements with escape protein or access to a leucaena bank during the wet season showed an efficient alternative.

【 授权许可】

CC BY-NC