Exigências nutricionais de lisina e de metionina + cistina totais para Frangos de corte nas fases de crescimento e final, mantendo ou não a relação lisina : aminoácidos sulfurosos

Abstract

Totais lysine and de metionina + cystine nutritional requirement for broiler on growing and finishing phase, maintaining or not the lysin relationship : aminoácids sulfur. Adviser: Fernando Guilherme Perazzo Costa. Committee Members: José Humberto Vilar da Silva, Walter Esfrain Pereira, Jorge Vitor Ludke e Carlos Boa Viagem Rabello. Six experiments were carried out to estimate the total lysine and methionine + cystine requirement for male Ross broilers, from 22 to 42 and 43 to 49 days of age maintaining or not lysine relationship : sulfur amino acids. During the period of 22 to 42 days 2.700 broilers have been used and basal diet containing 19,5 % of CP and 3.100 kcal de ME/kg. On experiment 1, it have been suplemented a basal diet with six levels (0; 0.08; 0.16; 0.24; 0.32 and 0.40 %) of lisina-L • HCl (78,4%) corresponding to levels (0.936; 1.016; 1.096; 1.176; 1.256 and 1.336 %) of total lysine. On experimente 2, it had been suplemented a basal diet with six levels (0; 0.04; 0.08; 0.12; 0.16 and 0.20 %) of methionine-DL (99%) corresponding to levels (0.664; 0.704; 0.744; 0.784; 0.824 and 0.864 %) of total met + cys. On experiment 3, relationship 1,41:1 was kept corresponding to levels (0.936 : 0.664; 1.016 : 0.721; 1.096 : 0.778; 1.176 : 0.835; 1.256 : 0.892 and 1.336 : 0.949 %) of total lysine : met + cys. During the period of 43 to 49 days of age. 2.700 have been used in 3 experiments and a deficient basal diet in total lysine and met + cys, with 18 % of CP and 3.200 kcal of ME/kg. In the experiment 1, it had been suplemented the basal diet with six levels (0; 0.08; 0.16; 0.24; 0.32 and 0.40 %) of lisina-L • HCl (78,4%)corresponding to levels (0.850; 0.930; 1.010; 1.090; 1.170 and 1.250 %) of total lysine. In the experiment 2, it had been supplemented the basal diet with six levels (0; 0,4; 0,08; 0,12; 0,16 and 0,20 %) of DL-methionine 99% corresponding to levels of (0.603; 0.643; 0.683; 0.723; 0.763 and 0.803 %) of total met + cys. On experiment 3, relationship 1.41:1 was kept on levels (0.850 : 0.603; 0.930 : 0.660; 1.010 : 0.717; 1.090 : 0.774; 1.170 : 0.831 and 1.250 : 0.888 %) of total lysine : met + cys. During the period of 22 and 42 days, on experiment1, levels of lysine had influenced linearly the feed intake and feed : gain ratio, and quadratically weight gain, with estimated requirement in 1.102 % of total lysine. To yield data, trataments have influenciede abdomen fat and gizzard weight, whith estimated requirements in 1.111 and 1.131 % of total lysine, respectively, in a conventional ration. On experiment 2, levels of met + cys had influenced quadratically weight gain with with estimated requirements in 0.758 and 0.792 %, and feed : gain ratio with estimated requirements in 0.758 and 0.809 % of total met + cys in a conventional ration and keeping relation respectively. To yield data, levels of met + cys had influenced linearly carcass yield and abdomen fat, and quadratically yield breast, whith estimated requirement in 0.823 % of total met + cys. On experiment 3, where relationship was kept, levels lysine : met + cys, had influenced quadratically weight gain with estimated requirement in 1.115 : 0,792 % and feed : gain ratio with estimated requirement in 1.140 : 0.809 % of total lysine : met + cys, respectively. During the period 43 to 49 days, on experiment 1, levels lysine had influenced quadratically feed : gain ratio and weight gain, with estimated requirement in 1.092 and 1.044 % of total lysine, respectively. To yield data, lysine levels had influenced linearly breast yield. On experiment 2, levels of met + cys had influenced quadratically gain weight and feed : gain ratio, with estimated requirement in viii 0.727 and 0.725 of met + cys, respectively. To yield data, met + cis levels had influenced quadratically the abdomen fat, with estimated requirement in 0.723 % of total met + cys. On experiment 3, relationship 1.41:1 was kept, lysine levels : met + cys had influenced quadratically gain weight and feed : gain ratio, with estimated requirement in 1.024 : 0.741 and 1.044 : 0.741 of total lysine : met + cys, respectively. To yield data, levels lysine : met + cys hed influenced quadratically carcass and breast yield, with estimated requirements in 1.035:0.735 and 1.023:0.726 % of total lysine : met+ cys, respectively. To gain weight relation to organs, lysine levels : met + cys had influenced quadratically heart weight, with estimated requirement in 1.087:0.770 % of total lysine : met + cys, respectively. About the results of gain weight, feed : gain ratio and breast yield, on 6 experiments, it can be recommended to broilers (male Ross), in period 22 to 42 days of age the nutritional levels 1.140 and 0.823 % of total lysine and met + cys, respectively and from to period 43 to 49 days of age, it can be recommended nutritional levels of 1.044 and 0.741 % of total lysine and met + cys, on ration keeping the relationship, lysine : sulfur amino acids