Digestibility of diets with passion fruit by-product estimated through external and internal markers in dairy heifers

• Published in: Acta scientiarum. Animal sciences Vol. 43; no. 1; p. e50241
• Main Authors: de Figueiredo, Mercia Regina Pereira, de Oliveira Simoes Saliba, Eloisa, Barbosa, Geraldo Sergio Carneiro, Colodo, Juliana Cristina Nogueira, de Oliveira Almanca, Rebeca Agnes, Moreira, Guilherme Rocha
• Format: Journal Article
• Language: English; Portuguese
• Published: Maringa Universidade Estadual de Maringa 2021; Editora da Universidade Estadual de Maringá - EDUEM; Editora da Universidade Estadual de Maringá (Eduem)
• Subjects: Byproducts; Carbon monoxide; Chromium; Chromium oxides; Diet; Dietary fiber; Digestibility; Dry matter; fecal recovery; in situ; passion fruit by-product; total collection; Feces; Fruits; Lignin; Markers; Nanoparticles; Nutrients; Passion fruit; Titanium dioxide; VETERINARY SCIENCES; Brasil; fecal recovery; total collection; passion fruit by-product; in situ
• ISSN: 1806-2636; 1807-8672; 1807-8672
• DOI: 10.4025/actascianimsci.v43i1.50241

This study examined the influence of the external markers chromium oxide (CO), titanium dioxide (TD), isolated, purified and enriched lignin (LIPE®) and isolated, purified, enriched lignin in nanoparticles (NANOLIPE®) as well as the internal markers indigestible dry matter (iDM), indigestible neutral detergent fiber (iNDF) and indigestible acid detergent fiber (iADF) in diets with inclusion of passion fruit by-product for dairy heifers on the estimation of fecal output and nutrient digestibility. Sixteen Holstein × Zebu crossbred heifers at an average live weight of 363 ± 28 kg were randomly distributed in a completely randomized design where they received diets in which Tifton 85 (Cynodon sp.) hay was replaced with passion fruit by-product (0, 12, 24 and 36%, as-fed basis). The CO, LIPE®, NANOLIPE® and iNDF markers did not differ from the total collection method (p > 0.05) in the estimation of fecal output and nutrient digestibility. The TD and iDM markers overestimated, while iADF underestimated fecal output. Under the presented conditions, we recommend using the CO, LIPE®, NANOLIPE® and iNDF markers to estimate fecal output and nutrient digestibility in diets with inclusion of passion fruit by-product for dairy heifers.