Relações metionina + cistina, treonina e triptofano com a lisina e níveis de lisina digestível em rações para codornas japonesas na fase de crescimento

• Autor(a) principal: Lima, Heder José D'ávila
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1801
• topic: Coturnix coturnix japonica; Desempenho; Metionina; Proteína ideal; Treonina; Triptofano; Coturnix coturnix japonica; Performance; Methionine; Ideal protein; Threonine; Tryptophan; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

There were four experiments to evaluate the relationship between methionine plus cystine and lysine (experiment I), threonine and lysine (experiment II) and tryptophan and lysine (experiment III), as well as the lysine requirement (experiment IV), for growing japanese quails with impact on the initial egg production. The first experiment was a completely randomized design with five dietary treatments, 10 replicates and 20 birds per cage, the others were 8 replicates of 20 birds per cage. In all experiments were evaluated the birds performance during the growing and egg production. In experiment I made was a basal diet deficient in methionine plus cystine, made from corn and soybean meal, containing 5.67 g methionine plus cystine / kg, supplemented with 5 levels of DL-methionine (99%), corresponding to the of methionine + cystine and lysine 0.54 (without supplementation); relationship 0.60, 0.66, 0.72 and 0.78. For the growth phase there was a linear increase in weight of birds at 40 days, weight gain at 40 days, feed intake, carcass weight, fat and body protein deposition, intake of methionine plus cystine and birds viability. Quadratic effect was observed for feed conversion and uniformity at 40 days and the feather percentage did not vary with the relationship. During the laying period, there was a linear effect on feed intake and weight gain of birds at 110 days old. For feed conversion per dozen eggs LRP was the best adjusted. For experiment II was formulated a basal diet deficient in threonine, made from corn and soybean meal, containing 6.6 g of threonine / kg, supplemented with 5 levels of L-threonine (98%), corresponding to the relationship between threonine lysine and 0.63 (without supplementation); relationship 0.60, 0.66, 0.72 and 0.78. The relationship between threonine and lysine did not influence the parameters in the growth and egg production phase, except the threonine intake that increased linearly. In Experiment III was made a basal diet, corn and soybean meal, deficient in tryptophan, with 1.48 g digestible tryptophan / kg, supplemented with 5 levels of L-tryptophan (98%), corresponding to the relationship between tryptophan and lysine 0.14 (without supplementation); relationship 0.16, 0.18, 0.20 and 0.22. For birds weight and weight gain until 40 days and feed intake in laying phase LRP was the best adjusted. For feed intake, feed conversion and birds viability in the growth phase, was quadratic effect. During the laying period was quadratic effect on egg production per bird housed in one day, egg weight, gain weight at 110 days and feed conversion per egg mass. The tryptophan use and egg production per bird housed in the laying varied linearly. In experiment IV was formulated a basal diet deficient in lysine, made from corn and soybean meal, containing 200.6 g crude protein / kg, 12.14 MJ / kg and 8.8 g lysine / kg, supplemented with L -lysine (78.4%), corresponding to the levels of lysine 8.8 g / kg (no L-lysine supplementation), 9.8 g / kg, 10.8 g / kg, 11.8 g / kg and 12.8 g / kg. For weight and weight gain of birds at 40 days old, carcass weight, feed conversion per dozen eggs and egg production per hen housed the LRP was the best adjusted. In the growth phase was a linear effect for feather percentage, fat deposition in the carcass, protein deposition in the carcass, feed intake and lysine intake. During the laying period was linear effect for the egg production per bird per day, egg mass, birds weight gain until 100 days old and feed conversion per egg mass. Concluded that relations between methionine plus cystine and lysine from 0.73, between threonine and lysine from 0.63 and between tryptophan and lysine digestible of 0.18 and lysine level of 11.85 g / kg provides better growth and performance of japanese quails in the laying phase.