Data/hora: 04/06/2024 06:35:05

Provedor de dados: | 89
País: | Brazil
Título: | EFFECTS OF THE COMBINATION OF NON-PHYTATE PHOSPHORUS, PHYTASE AND 25-HYDROXYCHOLECALCIFEROL ON THE PERFORMANCE AND MEAT QUALITY OF BROILER CHICKENS
Autores: | Ren,L; Zuo,J; Li,G; Zheng,L; Zhang,Z; Ye,H; Xia W,I; Feng,D.
Data: | 2015-09-01
Ano: | 2015
Palavras-chave: | Broiler; Non-phytate phosphorus; Performance; Phytase; 25-hydroxycholecalciferol.
Resumo: | ABSTRACTThis experiment was conducted to evaluate the combination effect of low dietary non-phytate phosphorus (NPP) concentrations, phytase (PHY) levels, and 25-hydroxycholecalciferol (25-OH-D3) levels on the growth performance and meat quality of broilers. Two levels of NPP, two levels of PHY, and two levels of 25-OH-D3 resulted in a 2�2�2 factorial arrangements, with eight treatments (TRT). The birds on TRT 1-4 were fed diet 1 (NRC NPP was reduced by 0.1) and the birds on TRT 5-8 were fed with diet 2 (NRC NPP was reduced by 0.2). Each diet was mixed with different levels PHY and 25-OH-D3. Performance and meat quality parameters were measured. Results showed that during entire experiment the most advantageous effects were obtained with TRT 3 (NRC NPP reduced by 0.1 + 600 U/kg phytase + 34.5�g/kg 25-OH-D3) and TRT 4 (NRC NPP reduced by 0.1 + 600 U/kg phytase + 69�g/kg 25-OH-D3). The lowest body weight gain (BWG) and feed intake(FI) were observed with TRT 5 (NRC NPP reduced by 0.2 + 300 U/kg phytase + 34.5�g/kg 25-OH-D3). Lowering NRC NPP by 0.1 to 0.2 significantly reduced weight gain (WG) (p&lt; 0.05) and FI (p&lt; 0.05) during the starter phase (ST), while during grower phase (GF) lowering NRC NPP by 0.1 to 0.2 did not affect WG (p&gt;0.05) and produced small decrease in FI. BWG, FI and feed conversion ratio were not influenced (p&gt;0.05) by different PHY or 25-OH-D3 levels. In addition, the meat color, pH, and shear force were not affected by the different NPP, PHY or 25-OH-D3levels.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300371
Editor: | Fundação APINCO de Ciência e Tecnologia Avícolas
Relação: | 10.1590/1516-635x1703371-380
Formato: | text/html
Fonte: | Brazilian Journal of Poultry Science  v.17 n.3 2015
Fonte: | info:eu-repo/semantics/openAccess