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Cinética do fósforo em tecidos de suínos alimentados com dietas contendo enzima fitase

Authors: Moreira, J.A.; Vitti, D.M.S.S.; Lopes, J.B.; Trindade Neto, M.A.;

Cinética do fósforo em tecidos de suínos alimentados com dietas contendo enzima fitase

Abstract

O experimento foi desenvolvido para avaliar a cinética do P em tecidos de suínos em crescimento, alimentados com rações contendo P orgânico e vários níveis de fitase, com o uso do 32P como indicador. Foram usados 12 animais mestiços, machos castrados, com peso médio de 31,68± 1,62kg, distribuídos em um delineamento inteiramente ao acaso, em esquema de parcela subdividida, contendo quatro tratamentos (253, 759, 1265 e 1748 UF (unidade de fitase) /kg) e três repetições. Os tratamentos foram constituídos de níveis de inclusão da enzima fitase nas dietas associados aos tecidos dos ossos, fígado, coração, rins e músculos. Os leitões foram mantidos em gaiolas metabólicas por um período de dez dias de adaptação e sete dias de coletas de sangue. No primeiro dia de coleta, foram injetados em cada animal, por via endovenosa, 7,4 MBq de 32P, como indicador. No final do período experimental os animais foram sacrificados e amostras dos tecidos coletadas. Os níveis da enzima fitase não interferiram na retenção de 32P nos tecidos e nas trocas plasmáticas dos mesmos. A ação da enzima fitase ocorreu, principalmente, na concentração de P nos rins, sendo sua atuação mais efetiva nos níveis entre 253 e 759 UF/kg de ração; o maior intercâmbio do fósforo em suínos alimentados com dietas contendo diferentes níveis de fitase ocorreu entre os rins e o plasma.

Keywords

calcium, nutrition, radionuclídeo, phytato, fitato, cálcio, isotopic dilution, diluição isotópica, radionuclide, nutrição

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green
gold