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Amino acid reduction in broiler diets supplemented with phytase and elaborated according to different nutritional plans Ciência e Agrotecnologia
Oliveira,Jeferson Eder Ferreira; Rodrigues,Paulo Borges; Alvarenga,Renata Ribeiro; Zangeronimo,Márcio Gilberto; Lima,Gustavo Freire Resende.
The need for suitable diets in chickens, considering the ideal protein concept associated with phytase, is important in order to improve the productivity of birds. The aim of this study was to assess the need for the correction of amino acid levels in the diets of broilers, by using different combinations of crude protein (CP) supplemented with phytase. For performance, eight days old Cobb 875 broiler chicks, with initial body weights of 155 ± 1.4g were used. The birds were distributed in a completely randomised design with seven treatments (nutritional plans) and five replicates of 25 birds. For the metabolism trial, 300 birds were selected which were also distributed using the same design, but with five, four and three birds per experimental stage: 8-21...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass characteristics; Ideal protein; Nutrition; Performance.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200012
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Available phosphorus in diets with or without ractopamine for late finishing gilts R. Bras. Zootec.
Campos,Priscila Furtado; Silva,Francisco Carlos de Oliveira; Ferreira,Aloízio Soares; Oliveira,Rita Flávia Miranda de; Donzele,Juarez Lopes; Girotto Júnior,Celso José; Pereira,Cinthia Maria Carlos; Saraiva,Alysson.
With the objective to evaluate levels of available phosphorus (aP) in diets with or without ractopamine, 112 gilts with high genetic potential for meat deposition with initial weigh of 94.0±2.28 kg were allotted in a completely randomized block design, in a 4 × 2 factorial arrangement (0.109, 0.209, 0.309, and 0.409% aP and 0 or 5 ppm of ractopamine), with eight treatments, seven replicates, and two gilts per experimental unit. There were no interactions between aP levels and ractopamine. The levels of available phosphorus influenced both daily weight gain and daily phosphorus intake, which increased linearly. Feed conversion improved in a quadratic way up to the estimated level of 0.330% aP maximum response. Daily weight gain increased and feed conversion...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beta agonist; Carcass; Ideal protein; Minerals; Performance.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300023
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Carcass characteristics of broilers at 42 days receiving diets with phytase in different energy and crude protein levels Ciência e Agrotecnologia
Nagata,Adriano Kaneo; Rodrigues,Paulo Borges; Alvarenga,Renata Ribeiro; Zangeronimo,Márcio Gilberto; Donato,Daniella Carolina Zanardo; Silva,José Humberto Vilar da.
The aim of this study was to evaluate carcass characteristics and quality of breast meat after the inclusion of phytase in broiler diets with different levels of apparent metabolizable energy (AMEn) corrected for nitrogen and reduced crude protein (CP) supplemented with essential amino acids following the concept of ideal protein. A total of 1,500 Cobb broilers from 22 to 42 days (initial weight of 833 ± 7 g and final weight of 2741 ± 48 g) were distributed in completely randomized design in a factorial 3x3+1 experiment (three levels of AMEn - 2,950; 3,100 and 3,250 kcal/kg - and three levels of CP - 14, 16 and 18% - and an additional treatment - control without phytase, with 3,100 kcal/kg EMAn, 19.2% PB and 0.4% available phosphorus), in six replications...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Available phosphorus; Dietary addictive; Enzyme; Ideal protein.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000300020
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Crude protein reduction and digestible methionine+cystine and threonine to digestible lysine ratios in diets for Nile tilapia fingerlings R. Bras. Zootec.
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
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Determination of digestible isoleucine: lysine ratio in diets for laying hens aged 42-58 weeks R. Bras. Zootec.
Mello,Heloisa Helena de Carvalho; Gomes,Paulo Cezar; Rocha,Tatiana Cristina da; Donzele,Juarez Lopes; Almeida,Rodrigo Lopes de; Troni,Allan Reis; Carvalho,Bruno Reis de; Viana,Gabriel da Silva.
Two hundred and fifty-two Hy-Line W36 laying hens were allotted in a completely randomized design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal ratio of isoleucine (Ile) in relation to lysine (Lys) to laying hens aged 42-58 weeks. Experimental diets contained digestible Ile at different levels, resulting in different Ile:Lys ratios (0.73:1; 0.78:1; 0.83:1; 0.88:1; 0.93:1 and 0.98:1). A basal diet was formulated to provide Isoleucine in levels below recommendations. This diet was supplemented with L-isoleucine to make up the 6 diets. Each diet was made isonitrogenous by varying the dietary contents of glutamic acid and isocaloric by adjusting the contents of cornstarch. All essential amino acids were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestible amino acids; Egg quality; Ideal protein; White laying hens.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500032
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Diets formulated on total or digestible amino acid basis with different energy levels and physical form on broiler performance Rev. Bras. Ciênc. Avic.
Maiorka,A; Dahlke,F; Penz,AM; Kessler,AM.
We studied the effects of two different systems of expressing amino acid requirements (total - TAA or digestible - DAA), two energy levels (2,900 or 3,200 kcal of ME/kg) and two physical forms (mash or pellet) on the performance of male broilers from 21 to 42 d of age. Diets formulated on DAA basis improved feed conversion (p<0.001) and the conversion of consumed ME into body weight gain (p<0.001). Birds fed 3,200 kcal ME/kg presented better feed conversion (p<0.001), higher abdominal fat deposition (p<0.001) and worse conversion of consumed ME into body weight gain (p<0.001) as compared to birds fed 2,900 kcal ME/kg. Birds fed pelleted feed had higher feed intake (p<0.001), higher weight gain (p<0.001), better feed conversion...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestible aminoacid; Energy; Ideal protein; Pellet.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100008
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Diets with reduced levels of nutrients supplemented with phytase and amino acids for broilers Ciência e Agrotecnologia
Gomide,Elisangela Minati; Rodrigues,Paulo Borges; Naves,Luciana de Paula; Bernardino,Verônica Maria Pereira; Santos,Luziane Moreira dos; Garcia,Antonio Amandio Pinto.
One performance experiment and another metabolism experiment were conducted simultaneously with broilers from 22 to 35 days of age, evaluating five diets in six replicates. The control diet, without phytase, contained 19% of crude protein (CP); 0.412% of available phosphorus (aP) and 0.824% of calcium (Ca). The other diets were supplemented with phytase and were formulated with 0.262% of aP and 0.524% of Ca, with the CP level ranging from 19 to 16%. In the performance assay, 750 birds were used, in which were evaluated the performance, the tibia ash content and yields of carcass, cuts, and abdominal fat at 35 days of age. The metabolism assay was conducted with 90 birds, evaluating the apparent metabolizable energy corrected by the nitrogen balance; the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tibia ash; Carcass yield; Ideal protein; Metabolism; Performance.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100013
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Digestible isoleucine requirements for 22- and 42-day-old broilers Animal Sciences
Duarte, Karina Ferreira; Junqueira, Otto Mack; Filardi, Rosemeire da Silva; Laurentiz, Antonio Carlos de; Domingues, Carla Heloisa de Faria; Rodrigues, Eliana Aparecida.
Current experiment established different criteria to evaluate the requirements of digestible isoleucine for 22- and 42-day-old broilers by different regression models (quadratic, exponential and Linear Response Plateau) and, in the case of statistical significance, the comparison of means by Duncan’s test at 5% probability. A total of 1,920 Cobb 500 male broilers were used in an entirely randomized experimental design, with 6 treatments (6 digestible isoleucine levels: 0.6118; 0.6655; 0.7192; 0.7729; 0.8265 and 0.8802%) and 8 replications, with 40 broilers each. Data on performance and carcass characteristics were evaluated. Level 0.7192% of digestible isoleucine was considered standard. The digestible isoleucine level recommended for 22- and 42-day-old...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestible amino acids; Ideal protein; Performance; Regression analyses.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/24473
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Digestible lysine levels obtained by two methods of formulation of diets for 22-to-42-day-old broilers R. Bras. Zootec.
Oliveira,Will Pereira de; Donzele,Rita Flávia Miranda de Oliveira; Donzele,Juarez Lopes; Albino,Luiz Fernando Teixeira; Antunes,Marcus Vinícius de Lima; Campos,Paulo Henrique Reis Furtado; Souza,Matheus Faria de; Pastore,Silvana Marques.
The objective of this study was to evaluate the effect of digestible lysine levels in diets with or without supplementation of industrial amino acids on performance, carcass characteristics and nitrogen excretion in broilers of 22 to 42 days of age. Birds were distributed in a completely randomized experimental design in a 4 × 2 factorial arrangement, with four digestible lysine levels (9.0, 10.0, 11.0 and 12.0 g/kg) and two methods to obtain the lysine levels (variation in the proportion of corn and soybean meal, without supplementation; or supplementation of industrial amino acids), eight replicates and 20 birds per replicate. There was an interaction effect on the performance characteristics and on the weights and yields of prime cuts. In both diets,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crude protein; Ideal protein; Industrial amino acids; Performance.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001100579
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Digestible Lysine on Live Performance of Chicken Type Naked Neck During the Starter Phase Rev. Bras. Ciênc. Avic.
Oliveira,RG de; Pinheiro,SRF; Castro,MR de; Vieira,DJ; Pires,AV; Abreu,LRA de.
ABSTRACT The poultry market has changed due to a higher consumer interest on products with differentiated organoleptic characteristics, making of free-range broiler production a promising activity. This experiment was conducted to determine the digestible lysine requirements of Redbro Cou Nu male and female chickens during the starter phase (one to 21 days of age). Six hundred and thirty Redbro Cou Nu broilers were distributed into 30 pens (21 chickens/pen) according to a randomized complete design in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine and two sexes, with three replicates (pens) per treatments. Diets with increasing digestible lysine levels (8.1, 9.5, 10.9, 12.3 and 13.7 g of digestible lysine per kg of diet) were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acid; Feed conversion ratio; Ideal protein; Nutritional requirement.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400483
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Digestible methionine + cysteine: lysine ratios for growing meat-type quails Ciência Rural
Castro,Mariana Resende de; Pinheiro,Sandra Regina Freitas; Miranda,Jéssica Amaral; Costa,Leonardo da Silva; Rocha,Graziela Maria de Freitas; Oliveira,Renata Gomes de; Martins,Paulo Gustavo Macedo de Almeida.
ABSTRACT: The objective was to estimate the most appropriate digestible methionine + cysteine:lysine ratios for growing meat-type quails (Coturnix coturnix) from 1 to 21 days of age. Quails were fed with a basal ration deficient in digestible methionine + cysteine, with five levels of DL-methionine, in substitution of glutamic acid and starch, resulting in digestible methionine + cysteine:lysine ratios of 0.61, 0.66, 0.71, 0.76 and 0.81. Feed and methionine + cysteine intake, body weight gain, feed conversion and uniformity were assessed. From 1 to 7 days, an increasing linear effect was observed for feed and methionine + cysteine intake, body weight gain, and uniformity, and a linear decrease for feed conversion. From 8 to 14 days, the 0.70 methionine +...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coturnix coturnix; Ideal protein; Performance; Sulfur amino acids.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600652
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Digestible threonine to lysine ratio in diets for laying hens aged 24-40 weeks R. Bras. Zootec.
Rocha,Tatiana Cristina da; Gomes,Paulo Cezar; Donzele,Juarez Lopes; Rostagno,Horacio Santiago; Mello,Heloisa Helena de Carvalho; Ribeiro,Cleverson Luís Nascimento; Troni,Allan Reis.
Two-hundred sixteen white laying hens were used to assess the ideal ratio of digestible threonine:lysine in diets for laying hens at 24 to 40 weeks of age. Birds were assigned to a randomized block design, with six treatments, six replicates per treatment and six birds per experimental unit. The cage was used as the blocking criterion. Experimental diets contained different digestible threonine:digestible lysine ratios (65, 70, 75, 80, 85 and 90%) with 142 g/kg of crude protein. Experimental diets were formulated to be isonitrogenous and isocaloric with different contents of L-glutamic acid. Feed intake (g/hen/d), egg production (%), egg weight (g), egg mass (g/hen/d), feed conversion ratio (kg/dozen and kg/kg egg), eggshell weight (g), albumen weight (g),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Egg production; Ideal protein; White laying hens.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001200007
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Digestible tryptophan levels for 30 to 60 kg pigs R. Bras. Zootec.
Apolônio,Lourdes Romão; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Saraiva,Alysson; Silva,Francisco Carlos de Oliveira; Ferreira,Aloízio Soares; Kill,João Luís; Haese,Douglas.
The objective of this study was to evaluate the effects of increasing dietary digestible tryptophan levels on performance and carcass traits of growing pigs. Fifty crossbred castrated male pigs, with average initial and final body weight of 29.0 ± 1.20 kg and 60.4 ± 1.95 kg were allotted in a completely randomized block design, with five treatments (0.125, 0.133, 0.141, 0.149, and 0.157% of digestible tryptophan, corresponding to digestible tryptophan:lysine relations of 15.0, 16.0, 17.0, 18.0, and 19.0%, respectively) and five replicates, with two pigs per experimental unit, which was represented by the pen. Experimental diets and water were supplied ad libitum throughout the experimental period. Averages of minimum and maximum temperatures inside the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Ideal protein; Performance; Protein deposition.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100015
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Digestible tryptophan levels in diets for pigs weighing 15 to 30 kg R. Bras. Zootec.
Apolônio,Lourdes Romão; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Saraiva,Alysson; Silva,Francisco Carlos de Oliveira; Ferreira,Aloízio Soares; Lima,Anderson Lazarini; Kill,João Luís.
In order to evaluate the effects of increasing dietary tryptophan levels on performance and carcass characteristics of growing pigs, a total of 60 crossbred castrated male pigs, with average initial and final body weights of 15.50 ± 1.15 and 30.60 ± 1.35 kg were used. Pigs were allotted in a completely randomized block design, with five dietary treatments (0.149, 0.158, 0.168, 0.177, and 0.187% digestible tryptophan, corresponding to digestible tryptophan:lysine relations of 16.0, 17.0, 18.0, 19.0, and 20.0%), six replicates, and two animals per experimental unit, which was represented by the pen. Experimental diets and water were supplied ad libitum throughout the experimental period. The average maximum and minimum temperatures inside the rooms were of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Ideal protein; Performance; Protein deposition.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800012
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Digestible tryptophan requirements for broilers from 22 to 42 days old R. Bras. Zootec.
Duarte,Karina Ferreira; Junqueira,Otto Mack; Filardi,Rosemeire da Silva; Siqueira,Jefferson Costa de; Puzotti,Maíra Mangili; Garcia,Edivaldo Antônio; Molino,Andrea de Britto; Laurentiz,Antonio Carlos de.
The objective of this experiment was to establish different criteria to evaluate the requirements of digestible tryptophan for broilers from 22 to 42 d of age, using different regression models (quadratic, exponential and Linear Response Plateau) and in case of statistical significance the comparison of means by Duncan test at 5% probability was also adopted. A total of 1,920 Cobb 500 male broilers were distributed in a completely randomized experimental design, with 6 treatments (6 digestible tryptophan levels: 0.1395, 0.1610, 0.1825, 0.2040, 0.2255 and 0.2470%) and 8 replications containing 40 broilers each. Performance and carcass characteristics were evaluated. The level of 0.2255% of digestible tryptophan numerically improves feed conversion, and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestible amino acids; Ideal protein; Performance; Regression analysis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001000006
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Digestible tryptophan:digestible lysine ratio in diets for laying hens from 24 to 40 weeks of age R. Bras. Zootec.
Calderano,Arele Arlindo; Gomes,Paulo Cezar; Donzele,Juarez Lopes; Barreto,Sergio Luiz de Toledo; Vellasco,Cássia Rampini; Mello,Heloisa Helena de Carvalho; Lelis,Guilherme Rodrigues; Rocha,Tatiana Cristina da.
The objective of this study was to determine the ideal digestible tryptophan:digestible lysine ratio in diets for laying hens from 24 to 40 weeks of age. Two hundred and forty Hy-Line W-36 laying hens at 24 weeks of age were distributed in a completely randomized design, with five treatments, eight replicates and six birds per experimental unit. The digestible tryptophan levels in the experimental diets were 1.57; 1.68; 1.79; 1.90 and 2.01 g/kg, providing ratios of digestible tryptophan:digestible lysine of 0.215; 0.230; 0.245; 0.260 and 0.275. The increase in the levels of digestible tryptophan in the diet linearly improved the feed intake, digestible tryptophan intake, digestible lysine intake, egg production, egg mass, feed conversion per egg mass and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acid; Birds; Ideal protein.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000006
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Digestible valine requirements for broilers from 22 and 42 days old Animal Sciences
Duarte, Karina Ferreira; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Junqueira, Otto Mack; Universidade Estadual Paulista “Júlio de Mesquita Filho” / Universidade Federal de Goiás; Domingues, Carla Heloísa de Faria; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Filardi, Rosemeire da Silva; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Borges, Liliana Longo; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Praes, Maria Fernanda Ferreira Menegucci; Universidade Estadual Paulista “Júlio de Mesquita Filho”.
Current experiment established different criteria to evaluate the requirements of digestible valine for broilers from 22 and 42 days of age, by different regression models (quadratic, exponential and Linear Response Plateau) and, in the case of statistical significance, the comparison of means byDuncantest at 5% probability. A total of 1,920 Cobb 500 male broilers were used and distributed in an entirely randomized experimental design, with 6 treatments (6 digestible valine levels: 0.7192, 0.7729, 0.8265, 0.8802, 0.9339 and 0.9876%) and 8 replications, with 40 broilers each. Data on performance and carcass characteristics were evaluated. The level of 0.8265% digestible valine was considered standard. The inclusion of 0.816, 0.848 and 0.903% of digestible...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestible amino acids; Ideal protein; Performance; Regression analyses.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22761
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Energy and protein levels in diets containing phytase for broilers from 22 to 42 days of age: performance and nutrient excretion R. Bras. Zootec.
Nagata,Adriano Kaneo; Rodrigues,Paulo Borges; Alvarenga,Renata Ribeiro; Zangeronimo,Márcio Gilberto; Rodrigues,Kênia Ferreira; Lima,Gustavo Freire Resende.
This study was conducted in order to evaluate the influence of different levels of metabolizable energy and crude protein in diets formulated according to the ideal protein concept with phytase supplementation on performance and nutrient excretion of broilers from 22 to 42 days age. It was used 1,500 Coob lineage broilers at 22 days of age and with initial weight of 833 ± 7g, distributed in completely randomized design in a 3 × 3 + 1 factorial scheme composed of three levels of correct apparent metabolizable energy (2,950; 3,100 and 3,250 kcal/kg), three levels of crude protein (14, 16 and 18%) and a control treatment, totaling ten treatments with six repetitions of 25 birds each. All diets, with the exception of the control, were supplemented with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Addictive; Available phosphorus; Enzyme; Ideal protein; Metabolizable energy; Pollutants.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800014
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Evaluation of different digestible lysine levels for male broilers during the period of 18 to 40 days of age Rev. Bras. Ciênc. Avic.
Carlos,TCF; Marino,CT; Silva,NVP da; Barbosa,LCGS; Reis,RN; Muramatsu,K; Araújo,CS da S; Araújo,LF.
A total of 1.500 male Cobb 500 broilers were used to determine the optimal digestible lysine level for 18 to 40-day-old broilers. The experimental period started when broilers were 18 days old and had an initial average weight of 737 ± 20 g. A completely randomized experimental design was applied, with five lysine levels, totaling five treatments with 10 replicates of 30 birds each. The experimental diets contained equal energy and protein levels, and 0.86, 0.95, 1.04, 1.13, and 1.22% digestible lysine. The following parameters were evaluated: average body weight at 40 days of age, daily weight gain, daily feed intake, feed conversion ratio, carcass yield and parts yield, and abdominal fat percentage. There was a quadratic effect (p<0.05) of digestible...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Poultry production; Performance; Ideal protein; Parts yield.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100012
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Evaluation of nutrient excretion and retention in broilers submitted to different nutritional strategies Rev. Bras. Ciênc. Avic.
Graña,AL; Tavernari,FC; Lelis,GR; Albino,LFT; Rostagno,HS; Gomes,PC.
An experiment was carried out to evaluate the effects of different nutritional strategies on nitrogen (N), phosphorus (P) and calcium (Ca) balance and on copper (Cu), manganese (Mn) and zinc (Zn) excretion in broilers during the periods of 1 to 21 days and 1 to 46 days of age. Four hundred male Cobb-500 broilers were used. A randomized block experimental design was applied, including five treatments with eight replicates of 10 birds each. A five-phase feeding program was adopted (1-8, 9-21, 22-33, 34-40 and 41-46 days of age). Treatments consisted of a control diet (C) with typical protein level and low amino acid supplementation; a reduced-protein diet supplemented with synthetic amino acids formulated on ideal protein concept (IP); C with phytase (C+PHY)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzyme; Phosphorus; Organic trace minerals; Ideal protein.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200013
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