Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio
Four experiments were conducted to study the requirements of available phosphorus (aP) for commercial male broilers of 1-10 day of age (exp.1), 11-21 days of age (exp. 2), 22-33 day of age (exp. 3) and 34-46 days of age (exp. 4), at a constant calcium:aP ratio. A complete randomized design was used in each experiment. The experimental diets were fed ad libitum to 8 replicate groups of ten broilers in each. The increments in the levels of aP ranged from 2.0 to 5.5 g/kg (exp. 1), 1.9 to 5.4 g/kg (exp. 2), 1.8 to 5.3 g/kg (exp. 3) and 1.7 to 5.2 g/kg (exp. 4), in 0.7 g/kg. The parameters evaluated were body weight gain, feed intake, feed conversion ratio and bone parameters. The level of aP in the diet influenced the performance of broilers of 1-10 and 11-21 days of age, but did not affect the performance of broilers at 22-33 and 34-46 days of age. Feed intake was not affected. The requirements of aP and Ca for male broilers from 1-10, 11-21, 22-33 and 34-46 days of age are 4.82 and 9.64 g/kg, 4.10 and 8.20 g/kg, 3.95 and 7.90 g/kg and 3.19 g.kg and 6.38 g/kg, respectively. The results indicate that low levels aP were required because the requirements of the mineral reduced as birds aged. Provided there is no excess of dietary levels of Ca, using a Ca:aP ratio of 2:1 may reduce the dietary levels of aP.
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Sociedade Brasileira de Zootecnia
2012
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oai:scielo:S1516-359820120011000042012-11-20Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratioMello,Heloisa Helena de CarvalhoGomes,Paulo CezarRostagno,Horacio SantiagoAlbino,Luiz Fernando TeixeiraRocha,Tatiana Cristina daAlmeida,Rodrigo Lopes deCalderano,Arele Arlindo chicks diets mineral performance tibia Four experiments were conducted to study the requirements of available phosphorus (aP) for commercial male broilers of 1-10 day of age (exp.1), 11-21 days of age (exp. 2), 22-33 day of age (exp. 3) and 34-46 days of age (exp. 4), at a constant calcium:aP ratio. A complete randomized design was used in each experiment. The experimental diets were fed ad libitum to 8 replicate groups of ten broilers in each. The increments in the levels of aP ranged from 2.0 to 5.5 g/kg (exp. 1), 1.9 to 5.4 g/kg (exp. 2), 1.8 to 5.3 g/kg (exp. 3) and 1.7 to 5.2 g/kg (exp. 4), in 0.7 g/kg. The parameters evaluated were body weight gain, feed intake, feed conversion ratio and bone parameters. The level of aP in the diet influenced the performance of broilers of 1-10 and 11-21 days of age, but did not affect the performance of broilers at 22-33 and 34-46 days of age. Feed intake was not affected. The requirements of aP and Ca for male broilers from 1-10, 11-21, 22-33 and 34-46 days of age are 4.82 and 9.64 g/kg, 4.10 and 8.20 g/kg, 3.95 and 7.90 g/kg and 3.19 g.kg and 6.38 g/kg, respectively. The results indicate that low levels aP were required because the requirements of the mineral reduced as birds aged. Provided there is no excess of dietary levels of Ca, using a Ca:aP ratio of 2:1 may reduce the dietary levels of aP.info:eu-repo/semantics/openAccessSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia v.41 n.11 20122012-11-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100004en10.1590/S1516-35982012001100004 |
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Mello,Heloisa Helena de Carvalho Gomes,Paulo Cezar Rostagno,Horacio Santiago Albino,Luiz Fernando Teixeira Rocha,Tatiana Cristina da Almeida,Rodrigo Lopes de Calderano,Arele Arlindo |
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Mello,Heloisa Helena de Carvalho Gomes,Paulo Cezar Rostagno,Horacio Santiago Albino,Luiz Fernando Teixeira Rocha,Tatiana Cristina da Almeida,Rodrigo Lopes de Calderano,Arele Arlindo Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
author_facet |
Mello,Heloisa Helena de Carvalho Gomes,Paulo Cezar Rostagno,Horacio Santiago Albino,Luiz Fernando Teixeira Rocha,Tatiana Cristina da Almeida,Rodrigo Lopes de Calderano,Arele Arlindo |
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Mello,Heloisa Helena de Carvalho |
title |
Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
title_short |
Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
title_full |
Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
title_fullStr |
Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
title_full_unstemmed |
Dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
title_sort |
dietary requirements of available phosphorus in growing broiler chickens at a constant calcium:available phosphorus ratio |
description |
Four experiments were conducted to study the requirements of available phosphorus (aP) for commercial male broilers of 1-10 day of age (exp.1), 11-21 days of age (exp. 2), 22-33 day of age (exp. 3) and 34-46 days of age (exp. 4), at a constant calcium:aP ratio. A complete randomized design was used in each experiment. The experimental diets were fed ad libitum to 8 replicate groups of ten broilers in each. The increments in the levels of aP ranged from 2.0 to 5.5 g/kg (exp. 1), 1.9 to 5.4 g/kg (exp. 2), 1.8 to 5.3 g/kg (exp. 3) and 1.7 to 5.2 g/kg (exp. 4), in 0.7 g/kg. The parameters evaluated were body weight gain, feed intake, feed conversion ratio and bone parameters. The level of aP in the diet influenced the performance of broilers of 1-10 and 11-21 days of age, but did not affect the performance of broilers at 22-33 and 34-46 days of age. Feed intake was not affected. The requirements of aP and Ca for male broilers from 1-10, 11-21, 22-33 and 34-46 days of age are 4.82 and 9.64 g/kg, 4.10 and 8.20 g/kg, 3.95 and 7.90 g/kg and 3.19 g.kg and 6.38 g/kg, respectively. The results indicate that low levels aP were required because the requirements of the mineral reduced as birds aged. Provided there is no excess of dietary levels of Ca, using a Ca:aP ratio of 2:1 may reduce the dietary levels of aP. |
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Sociedade Brasileira de Zootecnia |
publishDate |
2012 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100004 |
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