Standardized amino acids digestibility of wheat distillers dried grains with solubles in force-fed roostersReportar como inadecuado




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* Corresponding author 1 Animal Physiology 2 Ajinomoto Eurolysine 3 Adisseo 4 Arvalis 5 Animal Physiology 6 Animal Physiology

Abstract : In recent years, policies encouraging the production of ethanol from maize or wheat have stimulated an increased production of distillers dried grains with solubles DDGS whose nutritional value for poultry is poorly described, especially for wheat DDGS. Seventeen wheat DDGS samples were obtained from 7 plants in Europe from June to September 2007. Each sample was analysed for chemical composition and 10 representative samples were measured for amino acids AA content and their standardized digestibility SDD in caecectomized roosters. Lightness score L of each DDGS was also measured. Results indicated a rather stable crude protein CP; N x 6.25 content 327 to 392 g-kg DM; average: 364 g-kg DM but the AA profile was rather variable between samples. Lysine lys was the most affected AA with contents ranging between 0.83 and 3.01 g-100g CP. In addition, only 0.76 of total lys were free if estimated by the fluoro dinitro benzene procedure and 0.85 of total lys were free if estimated by the furosine procedure. The SDD of lys was also highly variable -0.04 to 0.71 with the lowest values observed for DDGS samples with a low lys content in CP; these latter samples had also a high occurrence of Maillard reactions and low L values < 50. Consequently, both lys content in CP r = 0.63 and SDD of lys r = 0.64 values were positively related with L. Our data indicate that lys SDD can be accurately predicted from lys content in CP according to a quadratic R² = 0.94 or a linear-plateau model R²= 0.90; breakpoint for 1.9 g-100g lysine in CP and a 68% plateau SDD value.

Mots-clés : Life Sciences





Autor: Pierre Cozannet - Yvan Primot - Cecile Gady - Jean-Paul Metayer - Michel Lessire - Fabien Skiba - Jean Noblet -

Fuente: https://hal.archives-ouvertes.fr/



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