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Digestible lysine for broiler chickens with lower genetic potential grown on free-range system Ciência e Agrotecnologia
Nascimento,Eduardo Souza do; Lima,Cristina Amorim Ribeiro de; Brasil,Ronner Joaquim Mendonça; Machado,Noédson de Jesus Beltrão; Sousa,Felipe Dilelis de Resende; Corrêa,Gerusa da Silva Salles.
ABSTRACT Determining the actual lysine requirement is crucial as it is an essential amino acid and plays animportant role in the metabolism of broilers. In addition, it is the second limiting amino acid for broilers fed with rations formulated basedon corn and soybean meal. The aim of this study was to determine the digestible lysine requirement for male broilers with lower genetic potential for growth in a semi-confined system as well as to evaluate the effects of different values of digestible lysine on performance and carcass characteristics. A total of 300 broiler chickensfrom a commercial lineage EMBRAPA 041 were used with an average initial weight of 987 g. The broilers were distributed into 20 experimental units in a completely randomized design...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Nutritional requirements; Performance; Yield.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000400454
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Digestible threonine for slow-growing broilers: performance, carcass characteristics, intestinal mucin, and duodenal morphometry R. Bras. Zootec.
Machado,Noédson de Jesus Beltrão; Lima,Cristina Amorim Ribeiro de; Brasil,Ronner Joaquim Mendonça; Quaresma,Débora Vaccari; Dilelis,Felipe; Silva,Ana Paula Pereira da; Curvello,Fernando Augusto.
ABSTRACT Five experiments were conducted to estimate the digestible threonine requirements of slow-growing broilers: experiment 1, starter phase (days 10 to 28); experiment 2, grower I phase (days 29 to 49); experiment 3, grower II phase (days 50 to 69); experiment 4, finisher phase (days 70 to 84); and experiment 5, which was specifically conducted to determine the production of intestinal mucin over two periods (days 50 to 69 and 70 to 84). Different birds were used in all experiments. A completely randomized design with five treatments and four replicates was used. Treatments consisted of increasing the values of digestible threonine in the diet through basal feed supplementation with L-threonine (98.5%), which was added instead of cornstarch. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acid; Nutritional requirements; Villus.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100514
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