Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/38353
Title: Modelos matemáticos no estudo do fluxo biológico de fósforo em ovinos que receberam na dieta níveis crescentes do mineral
Other Titles: Mathematical models to study the biological phosphorus flow in sheep fed increasing levels of mineral
Keywords: Ovino
Santa Inês
Diluição isotópica
Poluição ambiental
Lamb
Isotopic dilution
Environmental pollution
Issue Date: 2011
Publisher: Universidade Federal de Minas Gerais, Escola de Veterinária
Citation: PARDO, R. M. P. et al. Modelos matemáticos no estudo do fluxo biológico de fósforo em ovinos que receberam na dieta níveis crescentes do mineral. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 63, n. 2, p. 456-464, 2011.
Abstract: Two compartimental models were applied and compared to evaluate the biological flow of P in lambs fed diets containing increasing levels of P (0, 2, 4 and 6g per day). Twenty four Santa Inês lambs with liveweight of 33.6kg were used. Dicalcium phosphate was used as P source and 32P as a tracer. P flow between compartments (gastrointestinal tract, blood, bones and soft tissues), ingestion, excretion and the mineral balance were evaluated. The increase in P intake increased fecal P loss. P flow from gastrointestinal tract to blood stream and opposite flow were affected quadratically by increased P intake, decreasing after the ingestion of 5.5g/day, without a difference among models. The models studied showed differences regarding the P flow between blood, bone and soft tissues, however, the P balance was not affected by the treatments. The increased P levels interfered with the biological P flow in sheep. The bioavailability of P diet decreases when intake exceeds the animal requirement, increasing losses to the environment. The quantification of biological P flow was different between models due to the structure of each one.
URI: http://repositorio.ufla.br/jspui/handle/1/38353
Appears in Collections:DZO - Artigos publicados em periódicos



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