Metabolismo do ferro em suínos recebendo dietas contendo fitase, níveis reduzidos de fósforo inorgânico e sem suplemento micromineral e vitamínico
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Data
2007-08
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Resumo
This research was aimed at evaluating the effect of
mineral-vitamin supplement withdrawal associated to reduction
of inorganic phosphorus level and addition of phytase in feed
on iron metabolism of finishing-phase pigs. Erythrocyte and
reticulocyte count, serum iron, ferritin and transferrin
quantification was performed. Forty eight hybrid swine females
with initial average weight of 60kg were allotted to a completely
randomized experimental design with six with four replications
of two animals each. Blood was drawn from a group of twenty
four 100kg animals and from a second group of twenty four
120kg animals. No differences (P>0.05) were observed in
erythrocyte and reticulocyte count or serum iron and transferrin
quantification. However, ferritin levels were increased in 100kg
animals fed basal feed without mineral/vitamin supplement
and inorganic phosphorus with phytase when compared to
animals fed basal feed without mineral/vitamin supplement
with inorganic phosphorus with phytase. The enzyme, even in
the absence of supplementation, assured the maintenance of
iron reserves in the body. Difference as mentioned above was
not detected in 120kg animals. The results of this work suggest
that withdrawal of vitamin and mineral supplement combined
with reduction of inorganic phosphorus and addition of phytase
do not lead to significant changes in iron metabolism.
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Eritograma, Ferro sérico, Ferritina sérica, Homeostase do ferro, Transferrina sérica, Erythrocyte count, Iron homeostasis, Serum ferritin, Serum iron, Serum transferrin
Citação
ALMEIDA, Renzo Freire de; LOPES, Eurípedes Laurindo; NUNES, Romão da Cunha; MATOS, Moema Pacheco Chediak; SOBESTIANSKY, Jurij; FIORAVANTI, Maria Clorinda Soares; OLIVEIRA, Ana Paula Ázara; RUFINO, Luciana Moura. Metabolismo do ferro em suínos recebendo dietas contendo fitase, níveis reduzidos de fósforo inorgânico e sem suplemento micromineral e vitamínico. Ciência Rural, Santa Maria, v. 37, n. 4, p. 1097-1103, jul./ago. 2007.