Teores de concentrado sobre a digestibilidade, desempenho e comportamento ingestivo de cordeiros

Parente, Henrique NunesParente, Michelle de Oliveira MaiaSilva, Ruan Mourão Gomes daSodré, Wesclley de Jesus dos SantosMoreira Filho, Miguel ArcanjoRodrigues, Rosane CláudiaSantos, Viviany Lúcia Fernandes dosAraújo, Jocélio dos Santos

The objectives of this research were to determine the effects increasing levels of concentrate on nutrients digestibility, performance, economic viability of diets and ingestive behavior of lambs. Fifteen crossbred lambs were used in a randomized complete block design according to initial body weight and age. Lambs were penned individually during 55 days, being 10 days for adaptation of diets and 45 days for data collection. The treatments consisted in three isonitrogenous diets with increasing levels of concentrate: 40, 60, or 80%, in dry matter basis. No effect (P >  0.05) were observed on dry matter intake, crude protein intake, crude protein digestibility and neutral detergent fiber digestibility, whereas the dry matter digestibility was lower (P 0.01) for lambs fed diets with 40% of concentrate. The addition of 80% concentrate decreased (P 0.05) neutral detergent fiber intake, however this treatment provided higher average daily gain, followed by 60 and 40% of concentrate. In relation to feeding behavior, the animals fed 80% concentrate spent more time with feeding (AU)

1. high grain diet
2. average daily gain
3. ganho de peso
4. intake
5. dieta de alto grão
6. nutritive value
7. consumo
8. valor nutritivo