Data/hora: 05/06/2024 01:34:32

Provedor de dados: | 89
País: | Brazil
Título: | Boron supplementation in broiler diets
Autores: | Fassani,EJ; Bertechini,AG; Brito,JAG; Kato,RK; Fialho,ET; Geraldo,A.
Data: | 2004-12-01
Ano: | 2004
Palavras-chave: | Animal nutrition; Boron; Broiler; Chicken; Performance.
Resumo: | 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 was affected by boron supplementation (p&gt;0.05) in the period from 1 to 7 days. The regression analysis indicated an ideal level of 37.4 ppm of boron for weight gain from 1 to 21 days (p&lt;0.05) without affecting feed conversion (p&gt;0.05), although feed intake was reduced linearly with increased boron levels (p&lt;0.05). In the total rearing period (1 to 42 days), the level of 57 ppm boron was adequate for weight gain (p&lt;0.01) without affecting feed conversion (p&gt;0.05). Ash and calcium percentages in the tibias of broilers and viability in the total rearing period were not affected by boron supplementation (p&gt;0.05).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400004
Editor: | Fundação APINCO de Ciência e Tecnologia Avícolas
Relação: | 10.1590/S1516-635X2004000400004
Formato: | text/html
Fonte: | Brazilian Journal of Poultry Science  v.6 n.4 2004
Fonte: | info:eu-repo/semantics/openAccess