|
|
|
|
|
| Mushtaq,MMH; Ahmad,G; Parvin,R. |
| ABSTRACTThe digestible lysine requirement for the growth performance of broilers fed diets with decreasing energy to protein ratio and reared under subtropical summer conditions were determined. Treatments consisted of five wheat-based diets with five levels (0.90, 0.95, 1.00, 1.05 and 1.10%) of digestible lysine (DL) and lowering energy to protein ratio (EPR; 13.6, 12.8, 12.0, 11.4 and 11.0), with five replicates of 80 birds each (n = 2000). Body weight gain (BWG) significantly increased by increasing DL levels during wk 1 (p<0.001), while 1.05% DL promoted the highest BWG during the whole experimental period (p<0.01). Increasing DL level resulted in significant reduction in feed intake (FI) and BWG to DL intake ratio (BWG:DLI) during wk 1-3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler; Digestible lysine; Energy to protein ratio; Growth performance; Subtropical summer conditions.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300381 |
| |
|
|
| Bernal,LEP; Tavernari,FC; Rostagno,HS; Albino,LFT. |
| Modern broilers have been submitted to continuous genetic improvement, and therefore, their nutritional requirements must be constantly updated to ensure their performance. Two experiments were carried out to evaluate different digestible lysine levels for starter (1021 days) and grower (22-35 days) phases. The experiments were carried out with male and female Cobb 500 broilers, distributed according to a randomized block experimental design in a 5x2 factorial arrangement (5 increasing digestible lysine levels x 2 sexes), totaling 10 treatments, with 8 replicates of 22 and 20 birds during the starter and grower phase, respectively. Digestible lysine levels of 1.06, 1.12, 1.18, 1.24, and 1.30 were used in the starter diets (10-21 days) and 0.9, 0.98, 1.04,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible lysine; Requirement; Performance; Broiler. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100007 |
| |
|
|
| Quadros,Moisés; Lanna,Eduardo Arruda Teixeira; Donzele,Juarez Lopes; Abreu,Márvio Lobão Teixeira de; Ribeiro,Felipe Barbosa; Takishita,Sylvia Sanae. |
| The objective of the present study was to investigate crude protein reduction and the methionine+cystine and threonine to lysine ratios in diets for reversed Nile tilapia fingerlings (Oreochromis niloticus), Thai strain. Four hundred and twenty Nile tilapia fingerlings with an average initial weight of 1.83 ± 0.02 g were placed in a completely randomized design, with five treatments, seven replications per treatment and 12 fish per experimental unit, for 37-days. Two crude protein (CP) levels were evaluated (32 and 28%). The diet with 32% CP had methionine+cystine:lysine and threonine:lysine ratios of 63 and 74%, respectively. Three diets with 28% CP had methionine+cystine:lysine and threonine:lysine ratios of 63 and 74%, 60 and 74% and 60 and 69%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible lysine; Ideal protein; Oreochromis niloticus; Synthetic amino acids. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000800002 |
| |
|
|
| Coneglian,Jorge Luis Bernardon; Vieira,Sergio Luiz; Berres,Josemar; Freitas,Dimitri Moreira de. |
| One thousand eight hundred and ninety male broilers of two strain crosses (fast and slow initial growth) were fed different ideal protein profiles in four-phase feed programs: 1 to 7, 8 to 21, 22 to 34 and 35 to 40 days of age. All vegetable, corn-soybean meal feeds were formulated to maintain the Met+Cys:Lys and Thr:Lys relationships at 75 and 65%, respectively, on true digestible basis. Three ideal protein profiles were used: low, medium and high. From 1 to 21 days of age, half of the birds fed low and high diets were changed to high and low diets, respectively. Birds on the medium diet were kept on the same diet until the end of the study. A 3 × 2 (ideal protein profile x strain cross) factorial design was used for the period from 1 to 21 days and a 5 ×... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Carcass; Digestible lysine; Performance; Strain crosses. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000200015 |
| |
|
|
|
