Changes in chemical composition in male turkeys during growth
| Autor: | J. van Milgen, V. Rivera-Torres, Jean Noblet |
|---|---|
| Přispěvatelé: | TECHNA, AgroParisTech, Systèmes d'élevage, nutrition animale et humaine (SENAH), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA) |
| Rok vydání: | 2010 |
| Předmět: |
Male
Turkeys Weight Gain 03 medical and health sciences Nutrient Animal science medicine Animals ALLOMETRIE Amino Acids Chemical composition 030304 developmental biology 2. Zero hunger chemistry.chemical_classification 0303 health sciences 0402 animal and dairy science Proteins COMPOSITION CORPORELLE 04 agricultural and veterinary sciences General Medicine Feathers 040201 dairy & animal science Amino acid chemistry [SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies Feather visual_art visual_art.visual_art_medium Energy density Body Composition Animal Science and Zoology Composition (visual arts) Allometry medicine.symptom Weight gain |
| Zdroj: | Poultry Science Poultry Science, Poultry Science Association, 2011, 90 (1), pp.68-74. ⟨10.3382/ps.2010-00633⟩ |
| ISSN: | 0032-5791 |
| Popis: | International audience; In growing animals, requirements for many nutrients (and energy) are determined by the retention of these nutrients. During growth, this retention changes in an absolute way and also between nutrients and energy, resulting in changing nutrient requirements. The objective of this study was to describe the changes in chemical composition in male growing turkeys. The serial slaughter technique was used to determine the composition of amino acids, lipid, ash, and water in feather-free body (FFB) and feathers in male turkeys offered feed ad libitum from 1 to 15 wk of age. Allometric relations were used to describe changes in body composition. The feather content in the body decreased from 6% at 1 wk of age to less than 3% at 15 wk of age. The water and protein content in FFB decreased with increasing FFB mass, with allometric scalars (b) of, respectively, 0.967 and 0.970, whereas the lipid content increased with increasing FFB mass (b = 1.388). The water, protein, and ash content in fat-free FFB was constant and represented, respectively, 71.6, 24.2, and 4.2% of the fat-free FFB mass. The amino acid content of FFB protein was relatively constant and only the Cys content decreased between 1 and 15 wk of age, whereas the Ile content increased. Feathers were mostly composed of protein, and the protein content did not change during growth. During growth, the Lys, Met, Trp, His, Tyr, Asp, and Glu contents in feather protein decreased, whereas the Cys, Val, and Ser contents increased. The contribution of feathers to whole-body amino acid retention ranged from 5% for His to 33% for Cys. On average, the weight gain of FFB contained 21.3% protein and 12.7% lipid, corresponding to an energy content of 10.1 kJ/g. The weight gain of feathers contained 87.4% protein, corresponding to an energy content of 20.4 kJ/g. The results of the present study can be used in a factorial approach to determine nutrient requirements in growing turkeys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|