Available phosphorus for 15- to 30-kg pigs kept in hot environment

AUTOR(ES)

Alebrante, Leandro, Donzele, Juarez Lopes, Oliveira, Rita Flavia Miranda de, Saraiva, Alysson, Guimarães, Simoni Eliza Facioni, Ferreira, Aloízio Soares, Silva, Francisco Carlos de Oliveira, Abreu, Márvio Lobão Teixeira de

FONTE

Revista Brasileira de Zootecnia

DATA DE PUBLICAÇÃO

2011-12

RESUMO

This experiment was conducted to determine the requirement of available phosphorus (aP) for pigs kept in hot environment. Seventy-two pigs (36 castrated males and 36 females) with initial weight of 15.10±0.31 kg were allotted in a completely randomized block design with six treatments (0.107, 0.214, 0.321, 0.428, 0.535, and 0.642% of aP), six replicates and two pigs (1 castrated male and 1 female) per experimental unit. Pigs were kept in a hot environment with temperature of 34.1±0.8 ºC. The levels of aP influenced the daily weight gain, which increased quadratically up to the estimated level of 0.477%, and feed conversion, which improved quadratically up to the estimated level of 0.457%. The levels of aP also influenced the content of phosphorus in the bone, which increased quadratically up to the estimated level of 0.529%. The available phosphorus requirement of 15- to 30-kg pigs kept in a hot environment, for the best results of daily weight gain, feed conversion and bone parameters are 0.477, 0.457, and 0.529%, corresponding to the estimated daily available phosphorus intakes of 4.75; 4.55 and 5.27 g, respectively.

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