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

• Main Authors: Leandro Alebrante, Juarez Lopes Donzele, Rita Flavia Miranda de Oliveira, Alysson Saraiva, Simoni Eliza Facioni Guimarães, Aloízio Soares Ferreira, Francisco Carlos de Oliveira Silva, Márvio Lobão Teixeira de Abreu
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Zootecnia 2011-12-01
• Series: Revista Brasileira de Zootecnia
• Subjects: genotype; minerals; requirement; swine; temperature
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200016

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.