"Avaliação de diferentes marcadores para a determinação da digestibilidade e taxa de passagem do alimento em suínos" / Use of different markers for determining apparent digestibility and rate of passage in swine

AUTOR(ES)

Liliana Lotufo Oetting

DATA DE PUBLICAÇÃO

2002

RESUMO

The aim of this work was (1) to evaluate the use of chromic oxide, lanthanum and ytterbium as indigestible markers for the measurement of apparent digestibility in finishing pigs, (2) to determine the rate of passage of feed and (3) to compare two analytical techniques (ICP-OES and ED-XRF). In the digestibility assay, 12 finishing gilts was used. The treatments represent the combination of the two analytical techniques (ICP-OES and ED-XRF) with the three markers used in the grab collection (Cr2O3, La, Yb), and a standard treatment (total collection). Four animals had been used to compare the single dose and withdrawal methods for measuring the rate of passage. Three markers (chromic oxide, lanthanum and ytterbium) with two analytical techniques were used. The rate of marker disappearance, or the slopes of the equations of the linear regression equations (“b”), was used to compare the rate of passage within treatments. Comparing the marker method to the classical method (total collection), lower digestibility coefficients (P<0,01) were obtained, ranging from 3 percents for Chromium + ICP-OES and Lanthanum + ED-XRF until 6 to 10 percents from the other treatments.The rate of markers passage, determined using rate constants (“b”), was similar for the withdrawal and single dose methods. However, the rate of passage of chromic oxide was higher than lanthanum and ytterbium, indicating that feed, probably, had a faster rate of passage than maize. Future research is necessary to draw a more accurately comparison of the three markers used in this study, and also, to consider adaptations to the methodology of grab collection, mainly regarding the inclusion of markers in the diet and adaptation period of the markers in the digestive tract of the animals.

ASSUNTO(S)

rare earth espectrometria digestibility marcadores swine avaliação nutricional animal terras raras nuclear tecnics técnicas nucleares suínos marker rate of passage

Documentos Relacionados

• Comparação de diferentes indicadores com método de coleta total para determinação da digestibilidade aparente de diferentes dietas para eqüinos
• Use of cutin for determining apparent digestibility of diets in horses
• Digestibilidade de fósforo de alimentos e exigência de fósforo digestível de aves e suínos
• Digestibilidade do cálcio de alimentos avaliada em frangos de corte e em suínos com diferentes métodos
• Avaliação da aceitabilidade e digestibilidade de dietas para eqüinos com diferentes fontes de óleo vegetal