Predicting feed digestibility from NIRS analysis of pig faeces

Bastianelli Denis, Bonnal Laurent, Jaguelin-Peyraud Y., Bocquier François, Noblet J.. 2015. Predicting feed digestibility from NIRS analysis of pig faeces. Animal (Cambridge), 9 (5) : 781-786.

Matériel d'accompagnement : 1 fichier "Supplementary materials" (1 p.)

Quartile : Q1, Sujet : AGRICULTURE, DAIRY & ANIMAL SCIENCE / Quartile : Q1, Sujet : VETERINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Digestibility is a key parameter in the evaluation of feeds; however, the measurements on animals require heavy experimental trials, which are hardly feasible when large numbers of determinations are required - for example, in genetic studies. This experiment aimed at investigating the possibility to predict digestibility from NIRS spectra measured on faeces. A total of 196 samples were available from a digestibility experiment investigating the effects of age and genetic background of Large White pigs fed the same diet, rich in fibre (NDF=21.4% DM). Digestibility of dry matter (dDM), organic matter (dOM), nitrogen content (dN), energy (dE) and apparent digestible energy content (ADE) were calculated, as well as total N content of faeces (N). The faeces samples were submitted to reflectance NIRS analysis after freeze-drying and grinding. Calibration errors and validation errors were, respectively, 0.08 and 0.13% DM for total N in faeces, 0.97% and 1.08% for dDM, 0.79% and 1.04% for dOM, 1.04% and 1.47% for dN, 0.87% and 1.12% for dE and 167 and 213 kJ/kg DM for ADE. These results indicate that NIRS can account for digestibility differences due to animal factors, with an acceptable accuracy. NIRS appears to be a promising tool for large-scale evaluations of digestibility. It could also be used for the study of digestibility of different feeds, after appropriate calibration based on a wide range of feed types.

Mots-clés Agrovoc : porcin, nutrition animale, digestibilité, valeur nutritive, traitement des aliments, fèces, Réflectance, réflectométrie, spectrométrie, spectroscopie infrarouge

Classification Agris : L02 - Alimentation animale
Q51 - Technologie des aliments pour animaux

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Bastianelli Denis, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0002-6394-5920
• Bonnal Laurent, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0001-5038-7432
• Jaguelin-Peyraud Y., INRA (FRA)
• Bocquier François, INRA (FRA)
• Noblet J., INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/575775/)

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