RESUMO

Two experiments (a digestibility and a performance tests) were carried out to evaluate sunflower seed (SS) as swine feeding on growing and finishing phases. To performance evaluation 48 pigs, with 19.78 kg liveweight were allotted to four treatments (diet without SS, 5%, 10% and diet with 20% of SS) and they were evaluated during four periods (growing I and II, finishing and total period). All animals were slaughtered and submitted to an electronic carcass evaluation at the end of the experiment. The digestible and metabolizable energy values of SS were 3234 and 3223 kcal/kg, respectively. There were regression effect (P < 0,05) on performance of the following characteristics for the levels of SS: daily feed intake (DFI): DFI(growing I) = 2066.500 - 20.990X; DFI (growing II) = 3098.470 - 36.015X; DFI (finishing) = 4114.030 + 63.420X - 6.447X2; DFI (total) = 2859.450 + 9.848X - 2.267 X2, daily weight gain (DWG): DWG (growing I) = 831.567 - 6.484X, DWG (finishing) = 964.135 + 3.350X - 1.059 X2, DWG (total) = 885.029 + 3.794X - 0.587 X2; feed gain ratio (FGR): FGR (growing II) = 3.356 - 0.025X; FGR (total) = 3.265 - 0.014X; muscle depth on carcass (MD): MD = 46.215 + 2.218X - 0.099 X2 and carcass weight (CW): CW = 75.303 - 0.464X. From the total period of the experiment, the best results to FGR were observed for rations with 20% of SS, and the best results for DWG were observed

O uso do grão de girassol (GG) para suínos em crescimento e terminação foi avaliado através de um ensaio de digestibilidade e um experimento de desempenho. Na avaliação zootécnica 48 suínos, com peso médio inicial de 19,78 kg foram tratados com 4 dietas (com 0%, 5%, 10% e 20% de GG) durante 4 períodos (crescimento I e II, terminação e total). Ao abate as carcaças foram eletronicamente tipificadas. A energia digestível e metabolizável do GG foi de 3234 e 3223 kcal/kg, respectivamente. Houve efeito da regressão (p < 0,05) dos níveis do GG no consumo diário de ração (CDR): CDR (crescimento I) = 2066,500 - 20,990X; CDR (crescimento II) = 3098,470 - 36,015X; CDR (terminação) = 4114,030 + 63,420X 6,447X2; CRD (total) = 2859,450 + 9,848X - 2,267X2; GDP (crescimento I) = 831,567 - 6,484X; no ganho diário de peso (GDP): GDP (terminação) = 964,135 + 3,350X - 1,059X2; GDP (total) = 885,029 + 3,794X - 0,587 X2; na conversão alimentar (CA): CA (crescimento II) = 3,356 - 0,025X; CA (total) = 3,265 - 0,014X, na profundidade do músculo na carcaça (PM): PM = 46,215 + 2,218X - 0,099 X2 e no peso da carcaça (PC): PC = 75,303 - 0,464X. Considerando o período total do experimento, a inclusão de 20% de GG favoreceu a CA, embora, para o GDP, os melhores valores foram obtidos para 0 e 5% de inclusão. A inclusão de 20% de GG piorou linearmente o peso da carcaça.