fluxo biológico do fósforo no metabolismo de suínos alimentados com dietas contendo fitase biological p flow on metabolism of pigs fed diets containg phytase
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ID: 139512
2004
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Abstract
A pesquisa foi conduzida para avaliar o fluxo biológico do P em suínos, na fase de crescimento, alimentados com dietas à base de milho, farelo de soja, farelo de arroz desengordurado e óleo de soja, isentas de P inorgânico e suplementadas com níveis crescentes de fitase (253, 759, 1.265 e 1.748 UF/kg de dieta), e destacar o melhor nível de utilização da enzima, usando modelos matemáticos. O modelo utilizado foi determinístico e compartimental, em que o trato gastrintestinal (C1), o plasma C2, os ossos (C3) e os tecidos moles (ossos, coração, figado, rins e músculos), estudados em conjunto (C4), representaram os compartimentos. Foram utilizados dados de metabolismo e cinética do P nos tecidos, obtidos pela técnica de diluição isotópica. Os parâmetros estimados foram: absorção, retenção, P endógeno que retorna ao trato gastrintestinal, P dietético absorvido, incorporação, reabsorção, balanço de P, P proveniente do osso, dos tecidos moles e do total absorvido que retorna ao trato gastrintestinal. o modelo biomatemático utilizado mostrou-se eficiente em explicar o fluxo do fósforo no organismo de suínos em crescimento. A fitase interferiu no fluxo biológico do P do compartimento C1 para o C3 e no refluxo dos compartimentos C3 e C4 para o C1. O nível 759 UF/kg de ração disponibilizou mais eficientemente o fósforo orgânico para o metabolismo dos suínos.
The study was conducted to evaluate the biological flow of P in pigs fed diets based on corn, soybean meal, defatted rice bran (DRB) and soybean oil, with increasing phytase levels (253, 759, 1265 and 1748 PU/kg of diet), using mathematics models. The model was deterministic and compartimental, in which the gastrintestinal tract (GIT) (C1), the plasma C2, the bones (C3) and the soft tissues (liver, heart, kidney and muscle) (C4) represented the compartments. Metabolism data and kinetics of P in tissues were used in the model, obtained by the isotopic dilution technique. The parameters used were: absorption, retention, endogenous P that return to the gastrintestinal tract (GIT), dietary absorbed P, accretion, reabsorption, balance of P in bone and soft tissues and P from total absorbed that returned the GIT. The biomathematical model used is adequate to explain the P flow in growing pig. The phytase enzyme interfere in biological flow of P from compartment C1 to C3 and with the output flow of P from compartment C3 and C4 to C1. The level of 759 PU of phytase in diet of growing pig availability more efficientily the organic phosphorus for the pigs metabolism.
The study was conducted to evaluate the biological flow of P in pigs fed diets based on corn, soybean meal, defatted rice bran (DRB) and soybean oil, with increasing phytase levels (253, 759, 1265 and 1748 PU/kg of diet), using mathematics models. The model was deterministic and compartimental, in which the gastrintestinal tract (GIT) (C1), the plasma C2, the bones (C3) and the soft tissues (liver, heart, kidney and muscle) (C4) represented the compartments. Metabolism data and kinetics of P in tissues were used in the model, obtained by the isotopic dilution technique. The parameters used were: absorption, retention, endogenous P that return to the gastrintestinal tract (GIT), dietary absorbed P, accretion, reabsorption, balance of P in bone and soft tissues and P from total absorbed that returned the GIT. The biomathematical model used is adequate to explain the P flow in growing pig. The phytase enzyme interfere in biological flow of P from compartment C1 to C3 and with the output flow of P from compartment C3 and C4 to C1. The level of 759 PU of phytase in diet of growing pig availability more efficientily the organic phosphorus for the pigs metabolism.
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moreira2004revistafluxo
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| Authors | ;José Aparecido Moreira;Dorinha Miriam Silber Schmidt Vitti;João Batista Lopes;Messias Alves da Trindade Neto |
| Journal | european journal of lipid science and technology |
| Year | 2004 |
| DOI |
10.1590/S1516-35982004000800019
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