Amino Acid Digestibility of Feed Ingredients in Cecectomized Adult Roosters

Abstract

A digestibility assay was conducted in order to determine the digestibility coefficients (DC) of amino acids of feed ingredients in cecectomized adult roosters. In total 48 cecectomized adult roosters were used to assess the coefficient of digestibility of 7 ingredients: corn, soybean meal, soybean concentrate, corn gluten meal, wheat bran, peanut meal, and feather meal. Each ingredient was replicated six times and a group of 6 rooster was used to measure endogenous amino acid losses. After 48 hours of fasting, the roosters were tube fed 20g of ingredients tested twice during a day. At 12 hour-intervals excreta and endogenous losses were collected and immediately freezedried for further chemical analysis. At the end of the assay, excreta were weighed and samples of ingredients, excreta, and endogenous losses were pooled and analysed for dry matter, nitrogen and amino acid content. The coefficients of indispensable amino acids for the most feed ingredients assessed in the current research were similar to published literature like AMINODat ® 5.0 and the 4 th edition of the Brazilian Tables for Poultry and Swine, except feather meal, in which only digestible Trp and Thr content were similar to literature. Particularly, the coefficients for some amino acids like Arg and Gly exhibited large discrepancies from literature in almost all the feed ingredients assessed herein. In general, using cecectomized adult roosters proved to be a reliable technique to assess the digestibility of feed ingredients used in poultry diets.

Digestible indispensable amino acid scores of animal and plant ingredients potentially used in dog diet formulation: how this protein quality metric is affected by ingredient characteristics and reference amino acid profile

“… Reference of nutritional data (amino acid profile, crude protein content, amino acid digestibility) for each ingredient; I, Cramer et al, 2007 ; G, Rojas and Stein, 2012 ; R, Faber et al, 2010 ; U, Bailey et al, 2020 ; H, NRC, 2012 ; P, CVB Feed Table, 2016 ; K, Sauvant et al, 2004 ; O, Mathai et al, 2017 ; X, Gottlob et al, 2006 ; M, Oba et al, 2019 ; V, Kerr et al, 2019 ; T, Zhang et al, 2015 ; S, Woyengo et al, 2015 ; Y, Park et al, 2020 ; J, Leme et al, 2019 ; W, Kong and Adeola, 2014 . AM, adult maintenance (using 110 kcal/kg 0.75 for FEDIAF); EG, early growth (NRC, 4 to 14 wk of age; FEDIAF, less than 14 wk of age); LG, late growth (NRC and FEDAF, greater than 14 wk of age), GR, growth and reproduction (AAFCO only).…”

“… Reference of nutritional data (amino acid profile, crude protein content, amino acid digestibility) for each ingredient; I, Cramer et al, 2007 ; G, Rojas and Stein, 2012 ; R, Faber et al, 2010 ; U, Bailey et al, 2020 ; H, NRC, 2012 ; P, CVB Feed Table, 2016 ; K, Sauvant et al, 2004 ; O, Mathai et al, 2017 ; X, Gottlob et al, 2006 ; M, Oba et al, 2019 ; V, Kerr et al, 2019 ; T, Zhang et al, 2015 ; S, Woyengo et al, 2015 ; Y, Park et al, 2020 ; J, Leme et al, 2019 ; W, Kong and Adeola, 2014 . …”

“… Reference of nutritional data (amino acid profile, crude protein content, amino acid digestibility) for each ingredient; H, NRC, 2012 ; B, Lee et al, 2020 ; K, Sauvant et al, 2004 ; C, Cervantes-Pahm et al, 2014 ; D, Cotten et al, 2016 ; E, Almeida et al, 2011 ; J, Leme et al, 2019 ; P, CVB Feed Table, 2016 ; O, Mathai et al, 2017 ; W, Kong and Adeola, 2014 ; F, Grosjean et al, 2000 . …”

Use of corn distillers dried grain with solubles in broilers feed

“…Diets were isonutritives taking the nutritional composition recommendations of Rostagno et al (2017) and considering the bromatological DDGS analysis (Table 1). Amino-acid content was based on Leme et al (2019).…”