Níveis de lisina digestível em dietas de fêmeas suínas criadas em ambiente semiárido

• Autor(a) principal: AZEVEDO, Jefferson Moraes
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRPE
• Texto Completo: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6960
• topic: Lisina; Nutrição animal; Suíno; CIENCIAS AGRARIAS::ZOOTECNIA

The objective of this study was to evaluate the influence of different lysine levels on performance of Duroc gilts in growing phase at 15 to 30 kg of body weight kept in a semi-arid environment. The mean of temperature in the experimental period was 32,6 °C and the humidity was 30.6 %. Thirty gilts with initial body weight of 15,5 ± 0,80 kg were randomly assigned to five treatments and six replicates, totaling 30 experimental pens and one animal per pen. Treatments have been formulated to reach 3230 kcal/EM per kg and 17% crude protein and supplemented with L-lysine HCL, resulting in diets with (0,850; 0,950; 1,050; 1,150; 1,250%) of digestible lysine and keeping the ideal protein ratio for the other essential amino acids. There was no effect of lysine levels on daily feed intake and daily weight gain, however, dietary lysine levels influenced daily lysine intake and the feed conversion, that show a point of response optimization at the level of 10,64g/kg or 1,064%, equivalent to concentration of 3,49g lysine/Mcal EM