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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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| 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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