Terminação de cordeiros suplementados em pastagem de tifton-85 ou confinados com dieta de alto grão

Detalhes bibliográficos
Ano de defesa: 2015
Autor(a) principal: Simões, Fernanda de Souza Britto
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
BR
Zootecnia
UFSM
Programa de Pós-Graduação em Zootecnia
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/10877
Resumo: This study was conducted at Sheep Laboratory of the Federal University of Santa Maria (UFSM), and to evaluate nutrient intake, performance, feeding behavior, the quantitative and qualitative characteristics of Tifton-85 pasture (Chapter I) as well as carcass characteristics, tissue composition and non-carcass of lambs weaned constituents finished in different feeding systems (Chapter II). Twenty-six male, weaned, castrated lambs cross-bred from Texel and Ile de France breeds were used. The treatments were the following: T1 - Containment: Concentrate + Tifton 85 hay (ad libitum) (CONF); T2 - Tifton-85 pasture + concentrate (ad libitum) (PSA) and T3 - Tifton-85 pasture + concentrate (1.0% body weight) (PSR). The animals were slaughtered when they reached the body condition (BC) pre-established 3.0. The consumption, performance, feeding behavior, carcass characteristics, the commercial cuts and non-carcass of the lambs were influenced (P<0.05) by different feeding systems. In treatments where the energy level in the diet was higher (CONF and PSA) animals showed DM, OM and CP higher, but lower NDF (P<0.05). Performed better (P<0.05). But the feeding behavior of the parameters of the lambs have changed (P<0.05) through the lower intake of NDF, but without compromising the rumination activity. Also showed superiority (P <0.05) on carcass traits, heavier commercial cuts (P<0.05) and the least developed gastrointestinal tract (P<0.05) compared to the lambs of PSR. However, the body measurements in vivo and on carcass, the tissue composition of the palette and the quantitative and qualitative characteristics of Tifton-85 pasture were not affected (P>0.05) by different systems terminus, except for the conformation and leg width (P<0.05) in lambs PSR. Thus, the confinement, the pasture with supplementation ad libitum or restricted characterized as viable alternatives of technical and productive point of view for finishing lambs weaned. Introducing potential for production carcasses with excellent quality, meeting the demands of actual consumer market.