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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Mathematical models for the study of the biological flow of phosphorus in pigs fed with diets containing increasing levels of phytase

Full text
Author(s):
J.A. Moreira [1] ; J.B. Lopes [2] ; D.M.S.S. Vitti [3] ; A.O. Teixeira [4]
Total Authors: 4
Affiliation:
[1] USP. Centro de Energia Nuclear na Agricultura - Brasil
[2] Universidade Federal do Piauí
[3] USP. Centro de Energia Nuclear na Agricultura - Brasil
[4] USP. Centro de Energia Nuclear na Agricultura
Total Affiliations: 4
Document type: Journal article
Source: Arquivo Brasileiro de Medicina Veterinária e Zootecnia; v. 61, n. 2, p. 420-428, 2009-04-00.
Field of knowledge: Agronomical Sciences - Animal Husbandry
Abstract

The biological flow of P was evaluated among the physiologic or the anatomical compartments of pigs fed diets with increasing phytase levels, using P-32 as tracer. The experimental design was completely randomized. Treatments consisted of phytase levels in diets (253, 759, 1265, and 1748UF/kg). The evaluated variables were: feed intake, excretion, specific activities and flow of P in the compartments (gut, blood, bone, and soft tissus). Phytase level did not interfere with fecal and urinary excretion, specific activities, incorporation and resorption of bone, and soft tissue P and in the bidirectional flow of gut and blood, but linearly affected P absorption and bone P retention. The best response was observed with the lowest phytase levels. (AU)

FAPESP's process: 04/14532-5 - Environmental impact of phosphorus excretion in livestock: quantitative analysis of flow phosphorus using bio-mathematical models
Grantee:Dorinha Miriam Silber Schmidt Vitti
Support Opportunities: Research Projects - Thematic Grants