Effects of dietary inclusion of bioactive grape seed extracts on protein and amino acid digestibility

Autor: Chamorro, Susana, Viveros, Agustín, Centeno, Carmen, Romero, Carlos, Arija, Ignacio, Brenes, Agustín
Jazyk: angličtina
Rok vydání: 2011
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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Popis: Resumen del trabajo presentado al 11th ADSA-ASAS (American Dairy Science Association - American Society of Animal Science) Joint Annual Meeting, celebrado en EE.UU del 10 al 14 de julio de 2011.
Polyphenols are chemically and biologically active compounds. Grape seed extracts (GSE) have been widely used as a human food supplement for health promotion and disease prevention. However, there was little information regarding its application in animal nutrition. An experiment was conducted to investigate the effect of inclusion of GSE at levels of 0, 0.0025, 0.025, 0.25, and 0.50 g/kg in a wheat soybean basal diet on growth performance and apparent ileal digestibility (AID) of CP and AA at 21 d of age. Each treatment was randomly assigned to 7 replicates (5 birds/replicate). At 21 d-old, 15 birds/treatment were sacrificed, and ileal contents of 3 chicks from the same treatment were pooled (5 samples/treatment) to determine AID of CP and AA. Celite (10 g/kg) was added as an indigestible marker. Performance was not affected by dietary treatments except in the case of birds fed the highest GSE concentration which showed a reduction of body weight and G:F, by 5.7% (P < 0.05) and 5.1% (P < 0.01) respectively, compared with those fed the basal diet. Animals fed 0.0025 g/kg GSE diets had a higher protein AID than those fed basal diets (86.2 vs. 84.2%, P < 0.005). However, a reduction (from 84.2 to 82.2%, P < 0.005) in protein AID was observed in chicks fed 0.5 g/kg as compared with those fed the basal diet. Dietary supplementation with GSE increased the AID of arginine and alanine and reduced that of glutamic acid and histidine as compared with the basal diet. The addition of 0.025 g/kg GSE increased the AID of lysine, threonine, cystine, serine, and glycine. A further addition up to 0.5 g/kg GSE reduced the AID of methionine, leucine, isoleucine, valine, aspartic acid, phenylalanine, and proline. The results of this study indicated that dietary GSE addition up to 0.25 g/kg did not impair growth performance nor CP digestibility. Further inclusion worsened growth performance and the AID of CP and that of several AA.
Databáze: OpenAIRE
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