Ileal true digestibility of amino acids in wheat milling by-products for pigs

Autor:	Sabine Van Cauwenberghe, François Gatel, Catherine Jondreville, F. Grosjean, Jan van den Broecke
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Methionine Bran Lysine Biology Amino acid Residue (chemistry) chemistry.chemical_compound Biochemistry chemistry Animal Science and Zoology Food science Threonine Digestion Wheat middlings
Zdroj:	Annales de Zootechnie. 49:55-65
ISSN:	1297-9651 0003-424X
DOI:	10.1051/animres:2000108
Popis:	Ten batches of wheat milling by-products - 3 of wheat middlings (WM), 4 of wheat feed (WF), 3 of wheat bran (WB) - were analysed and studied for their protein and amino acid ileal true digestibility (ITD). Each batch was tested on four castrated male pigs weighing between 35 and 95 kg, and fitted with an end-to-end ileo-rectal anastomosis. In all types of by-products, lysine and threonine were among the least digestible amino acids, whereas methionine was among the most digestible ones. N and all amino acids ITD decreased significantly ( P < 0.05) from WM to WF and to WB. In WM, the average N, lysine, threonine and methionine ITD values were 93.6, 90.8, 90.4 and 95.1%, respectively. They decreased to 85.5, 86.6, 83.3 and 91.5%, respectively in WF and down to 70.1, 68.3, 68.4 and 78.9%, respectively in WB. N and all amino acids ITD was predicted according to either the ratio of the feedstuff fibre to amino acid concentrations, or the proportion of total N bound to the NDF (neutral detergent fibre) residue, or both. For most amino acids, the use of CF (crude fibre), ADF (acid detergent fibre) or ADL (acid detergent lignin) as fibre criteria provided accurate equations with coefficient of determination higher than 90%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ee0c3ce0383f97723ff876f6f0245c5 https://doi.org/10.1051/animres:2000108 Zobrazit plný text záznamu