Biological availability of phosphorus from various sources of phosphate based on isotopic dilution technique: II. Growing swine

Revista Brasileira de Zootecnia

Lopes, João Batista³  Figueirêdo, Agustinho Valente de³  Vitti, Dorinha Miriam S. S.¹  Barbosa, Hacy Pinto² 

[1] USP, Piracicaba;Instituto de Zootecnia, Nova Odessa;UFPI, Teresina

关键词: endogenous;    isotopic dilution;    metabolism;    phosphorus;    radiophosphorus;    swine     IntroduçãoO fósforo;    normalmente;    é adicionado às rações dos monogástricos;    representando de 1;    0 a 1;    5% das despesas totais com alimentação dos suínos;   

DOI  :  10.1590/S1516-35982001000600019

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- Twenty four male castrated pigs, 45.95 kg of weight live, were used to determine the minimum fecal endogenous phosphorus losses, the rate of true absorption feed and the biological availability of various phosphate sources. A complete randomized block design, with six treatments and four replicates with one animal per experimental unit, was used. The diets were based on corn and soybean meal. The phosphorus supplement of the following sources were used: dicalcium (BIC); Tapira (TAP); Patos Minas (FPM); monoammonium (MAP) e triple superphosphate (SPT) and the diet control without P supplementation (CONT). At the 7th experimental day, the animals were intravenously injected with 7.4 MBq of 32P as sodium phosphate. Samples of blood, feces and urine were collected for seven day. It was concluded that the biological availability was 71.94, 76.67, 69.49, 64.92 and 66.35% for phosphates BIC, TAP, FPM, MAP and SPT, respectively. The variables assessment showed similar responses to various sources of phosphate.

【 授权许可】

CC BY-NC