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

• Autor(a) principal: Alebrante, Leandro
• Data de Publicação: 2011
• Outros Autores: 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
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.1590/S1516-35982011001200016; http://www.locus.ufv.br/handle/123456789/13996
• topic: Genotype; Minerals; Requirement; Swine; Temperature

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.