Consulta: creatorFacets:"Bertechini,AG"
Registros recuperados: 10
Data/hora: 20/05/2024 06:48:35

Boron supplementation in broiler diets
Provedor de dados: 89
Autores: 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

Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production
Provedor de dados: 89
Autores: 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

Efeitos dos cloretos de potássio e de amônia sobre o desempenho e deposição de gordura na carcaça de frangos de corte criados no verão
Provedor de dados: 89
Autores: 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

Effect of cage density on the performance of 25- to 84-week-old laying hens
Provedor de dados: 89
Autores: 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

Effect of ph and temperature on the activity of phytase products used in broiler nutrition
Provedor de dados: 89
Autores: 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

Nutritional and microbiological evaluation of meat and bone meal produced in the state of Minas Gerais
Provedor de dados: 89
Autores: Sartorelli,SA; Bertechini,AG; Fassani,EJ; Kato,RK; Fialho,ET.
The present study investigated the chemical composition and metabolizable energy levels of ten meat and bone meals (MBM) produced in Minas Gerais state (Experiment I) and evaluated the growth performance of broilers fed with diets containing those MBM (Experiment II). In the first experiment, energy values (apparent metabolizable energy [AME] and corrected apparent metabolizable energy [AMEn]) of ten different MBM were determined using the traditional method with total collection of excreta. Four hundred forty 21 day-old Hubbard broilers were used. A reference corn and soybean meal-based diet was replaced in 20% by the feed containing MBM to be tested. A completely randomized experimental design was used with eleven treatments (one reference diet and ten...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Ingredient; Meat and bone meal; Metabolizable energy; Salmonella.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000100007

Performance, Growth Curves and Carcass Yield of Four Strains of Broiler Chicken
Provedor de dados: 89
Autores: 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

Protease Supplementation under Amino Acid Reduction in Diets Formulated with Different Nutritional Requirements for Broilers
Provedor de dados: 89
Autores: 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

Suplementação de Ferro para Poedeiras Comerciais de Segundo Ciclo de Produção
Provedor de dados: 89
Autores: 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

Utilização de diferentes níveis de suplementação de sódio para poedeiras comerciais no segundo ciclo de produção
Provedor de dados: 89
Autores: 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