Made available in DSpace on 2014-07-29T15:07:51Z (GMT). No. of bitstreams: 1 dissertacao marcondes.pdf: 1534515 bytes, checksum: 3d0c83aec8226f60fa609811050ce4b6 (MD5) Previous issue date: 2009-07-30 / The objective of the experiment was to evaluate the feedlot performance of steers with dairy origin, which during the growing phase were supplemented on pasture with two levels of concentrate (high=1% or medium=0,5% BW), and that during finishing were submitted to two concentrate levels (high=80% or medium=50%), resulting into four feedlot treatments, THH, THM, TMH and TMM. Steers from treatments that received higher supplementation level during growth,, were heavier at beginning and stayed less time in feedlot to reached slaughter weight. Average daily dry matter intake (DMI) for TAA was higher than for TMM animals, both not differing from TAM and TMA. DMI expressed as percentage of weight, average daily weight gain and feed conversion were similar among treatments. Animals supplemented with 1% during growing phase showed higher (p<.05) initial thoracic perimeter and lower gain of this measure during feedlot, resulting no difference among treatments at the end. Animals that received lower level of supplement during growing phase had lower rump height at the beginning and showed higher gain for this measure during feedlot. Final rump height was higher (p<.05) for TAM and TMM animals / Foi avaliado o desempenho em confinamento de novilhos de origem leiteira, que na fase de recria foram suplementados no pasto com dois níveis de concentrado (Alto=1% ou Médio=0,5% do PV), e que na terminação foram subdivididos e submetidos a dois níveis de concentrado (Alto=80% ou Médio=50%), gerando quatro tratamentos no confinamento, TAA, TAM, TMA e TMM. Os animais dos tratamentos que receberam maior nível de suplementação na recria foram mais pesados no início e permaneceram menos tempo no confinamento para chegar ao peso de abate. O consumo de matéria seca (CMS) médio diário no TAA foi maior que no TMM, ambos não diferindo do TAM e TMA. CMS expresso por 100 kg de peso, ganho de peso médio diário e conversão alimentar foram similares entre tratamentos. Animais suplementados com 1,0% na fase de recria apresentaram maior (p<0,05) perímetro torácico inicial e menor ganho desta medida durante o confinamento, sem diferença entre tratamentos no final. Animais que receberam menor nível de suplementação na recria apresentaram menor altura de garupa no início e maior ganho em altura durante o confinamento. No final esta medida foi maior (p<0,05) nos animais TAM e TMM