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| Registros recuperados: 10 | |
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| Fassani,EJ; Bertechini,AG; Brito,JAG; Kato,RK; Fialho,ET; Geraldo,A. |
| Boron supplementation in broiler feed is not a routine practice. However, some reports suggest a positive effect of boron on performance. This study assessed the effects of boron supplementation on broiler performance. Diets were based on maize and soybean meal, using boric acid P.A. as boron source. Six supplementation levels (0, 30, 60, 90, 120 and 150 ppm) were evaluated using 1,440 one-day old males housed at a density of 30 chickens in each of 48 experimental plots of 3m². A completely randomized block design was used with 8 replicates. Feed intake, weight gain and feed conversion were assessed in the periods from 1 to 7 days, 1 to 21 days and 1 to 42 days of age, and viability was evaluated for the total 42-day rearing period. No performance variable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal nutrition; Boron; Broiler; Chicken; Performance. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400004 |
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| Kato,RK; Bertechini,AG; Fassani,EJ; Santos,CD; Dionizio,MA; Fialho,ET. |
| The supplementation of cobalt and vitamin B12 in diets for commercial laying hens on the second production cycle was studied. Four hundred and eighty light commercial laying hens, Lohmann LSL, were used at initial phase of forced molting laying period. The trial was conducted in a randomized design. The plots were the treatments which were constituted by combination of five cobalt levels (0.00; 0.30; 0.60; 0.90 and 1.20ppm) and two vitamin B12 levels (without and with 10µ/kg), and the split-plots were four periods (21, 42, 63 and 84 days) during the second period of production, with 4 repetitions and 12 hens per experimental unit. Food and water were provided ad libitum and eggs were collected twice daily. Performance and egg quality parameters were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cobalt; Egg production; Laying hens; Nutrition; Vitamin B12. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000100006 |
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| Souza,BB; Bertechini,AG; Teixeira,AS; Lima,JAF; Pereira,SL; Fassani,EJ. |
| Foram utilizados 240 frangos machos, Hubbard, com peso médio inicial de 1204g, em DIC, com os tratamentos em esquema fatorial 2 x 3 x 2, sendo 2 níveis de KCl (0,0% e 1,2%) x 3 níveis de NH4Cl (0,0%; 0,2% e 0,4%) x 2 níveis de energia (3000 e 3200 kcal EM/kg de ração), com 4 repetições de 5 aves por parcela. Os parâmetros avaliados foram: peso médio (PM), consumo de ração (CR), ganho de peso (GP), conversão alimentar (CA), rendimento de carcaça (RC) e gordura abdominal (GA). Os dados foram analisados pelo programa estatístico Statistical Analyses System (SAS, 1996). As temperaturas máxima e mínima foram de 32,7° e 22,8°C, e o índice de temperatura do globo negro e umidade (ITGU) observado às 9:00 e 15:00 horas foi de 76 e 83, respectivamente. A análise de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cloreto de amônia; Cloreto de potássio; Estresse calórico; Frangos de corte. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000300005 |
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| Rios,RL; Bertechini,AG; Carvalho,JCC; Castro,SF; Costa,VA. |
| Three experiments were carrie out to evaluate the influence of cage density on the performance of 25- to 84-week-old laying hens. Forty hundred Lohmann-LSL layers were distributed in cages (100x40x 45x50cm) according to a completely randomized experimental design with split plot in time.Three treatments (10, 12, or 14 hens per cage, corresponding, to 450, 375, and 321cm²/bird, respectively), with 15 assessment periods (four weeks each), and eight replicates per treatment were applied. Considering that layer's production cycle is affected by age, three experimental trials (25 to 44; 45 to 64 and 65 to 84 weeks of age) were carried out, and the data collected in each trial was individually analyzed. Increasing cage density significantly reduced feed intake... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds per cage; Cage density; Egg production; Laying hens. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000400007 |
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| Naves,L de P; Corrêa,AD; Bertechini,AG; Gomide,EM; Santos,CD dos. |
| The activity of three commercial microbial phytase (Aspergillus oryzae, A. niger, and Saccharomyces cerevisae) products used in broiler nutrition was determined at different pH (2.0 to 9.0) and temperature (20 to 90°C) values. Enzymatic activity was determined according to the reaction of the phytase with its substrate (sodium phytate), in four replicates, and was expressed in units of phytase activity (FTU). A. oryzae phytase exhibited optimal activity at pH 4.0 and 40°C, but its absolute activity was the lowest of the three phytases evaluated. A. niger phytase exhibited maximal activity close to pH 5.0 and 45ºC, whereas S. cerevisae phytase presented its highest activity at pH close to 4.5 and temperatures ranging between 50 and 60°C. It was concluded... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enzymatic activity; Enzyme; Phytate; Phytic acid. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300004 |
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| Nogueira,BRF; Reis,MP; Carvalho,AC; Mendoza,EAC; Oliveira,BL; Silva,VA; Bertechini,AG. |
| ABSTRACT The objective of this study was to evaluate the performance, carcass yield and growth curves of different commercial strains of broiler chicken. 2400 day-old chicks, males and females of the Cobb500, RossAp95, Hubbard Flex and a new Francesa line were used. The birds were distributed in a completely randomized design in a factorial arrangement 4x2 (line x sex), forming eight treatments with 10 replicates each. The birds were fed with the same diet. Feed intake, weight gain and feed conversion were determined. At 42 days, it was determined at the request of carcass and cuts of each lineage. The Gompertz model was applied to a growth curve for each line. The RossAP95 line shows the best performance results. Growth curves showed lower sexual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chicken genetics; Gompertz; Viscera yield. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000400309 |
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| Dessimoni,GV; Dalólio,FS; Moreira,J; Teixeira,LV; Bertechini,AG; Hermes,RG. |
| ABSTRACT This study aimed to evaluate the effect of different reductions in digestible amino acids content (lysine, methionine, and threonine), according to two nutritional requirements in corn, soybean meal, and meat and bone meal based diets, with protease supplementation, on performance parameters and carcass characteristics. A total of 1080 day-old chicks, male, Cobb 500, were allotted to a completely randomized design, in a factorial arrangement 3 x 2, three reductions in digestible amino acids content (lysine, methionine, and threonine) and two nutritional requirements (Rostagno et al. 2005 and Cobb-Vantress Guidelines 2008), and all diets were supplemented with protease (200 ppm) with 6 replicates of 30 birds per pen. There was no significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Performance; Nutritional recommendations; Monocomponent protease; Carcass characteristics; Poultry. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100305 |
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| Bertechini,AG; Fassani,ÉJ; Fialho,ET; Spadoni,JA. |
| O objetivo deste trabalho foi avaliar os efeitos da suplementação de ferro, proveniente do sulfato ferroso (26% de ferro), em ração à base de milho e farelo de soja, sobre o desempenho, qualidade do ovo, deposição de ferro na gema e parâmetros sangüíneos de poedeiras comerciais no segundo ciclo de produção. Foram utilizadas 240 poedeiras comerciais Lohmann-LSL, oriundas de plantel comercial e submetidas a muda forçada com 72 semanas de idade, alojadas em galpão convencional de postura, em uma densidade de três aves por gaiola (25 x 45 x 40 cm). O delineamento experimental foi inteiramente casualizado, com os tratamentos constando níveis de 0, 20, 40, 60 e 80 ppm de ferro suplementar, com quatro repetições de 12 aves, e três períodos de avaliações de 28... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ferro; Poedeiras comerciais; Nutrição avícola. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2000000300009 |
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| Fassani,EJ; Bertechini,AG; Brito,JAG; Kato,RK; Geraldo,A. |
| Realizou-se um experimento com o objetivo de estudar a suplementação de sódio para poedeiras comerciais no segundo ciclo de produção. Foram utilizadas 360 aves Lohmann - LSL, distribuídas em gaiolas convencionais, onde receberam 5 tratamentos experimentais (níveis de sódio suplementar de 0,05; 0,10; 0,15; 0,20 e 0,25%), com 6 repetições de 12 aves cada, avaliados em 3 períodos de 21dias. O delineamento experimental foi o inteiramente casualizado em esquema de parcelas subdivididas, sendo os tratamentos designados nas parcelas e as avaliações nos períodos, nas subparcelas. As rações foram isonutritivas à base de milho e farelo de soja e fornecidas à vontade. O sódio suplementar foi adicionado às dietas usando o NaCl contendo 39,7% desse elemento. Ao final... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sódio; Poedeiras; Produção de ovos; Segundo ciclo; Qualidade de casca dos ovos. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000300008 |
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| Registros recuperados: 10 | |
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