Influence of storage time and processing on chemical composition and in vitro ruminal fermentation of olive cake

Navarro Marcos, Carlos and Evan, T. de and Garcia Rebollar, Paloma and Blas Beorlegui, Juan Carlos de and Carro Travieso, Maria Dolores (2019). Influence of storage time and processing on chemical composition and in vitro ruminal fermentation of olive cake. "Journal of Animal Physiology and Animal Nutrition", v. 103 (n. 5); pp. 1303-1312. ISSN 0931-2439. https://doi.org/10.1111/jpn.13149.

Description

Title: Influence of storage time and processing on chemical composition and in vitro ruminal fermentation of olive cake
Author/s:
  • Navarro Marcos, Carlos
  • Evan, T. de
  • Garcia Rebollar, Paloma
  • Blas Beorlegui, Juan Carlos de
  • Carro Travieso, Maria Dolores
Item Type: Article
Título de Revista/Publicación: Journal of Animal Physiology and Animal Nutrition
Date: September 2019
ISSN: 0931-2439
Volume: 103
Subjects:
Freetext Keywords: crude olive cake; exhausted olive cake; gas production; in vitro ruminal fermentation; storage time
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Olive oil extraction generates olive cake (OC) that could be used in ruminant feeding. However, the chemical composition of OC is affected by multiple factors, being therefore highly variable. The objective of this study was to analyse the influence of storage time and further processing: crude, exhausted (subjected to a second oil extraction) and cyclone (obtained from a cyclone separator) on nutritive value of OC samples. Twelve samples (six crude and six exhausted) were obtained monthly from the same pond from 1 to 6 storage months, and nine samples (three crude, three exhausted and three cyclone) were obtained monthly from a different pond from 6 to 9 months storage. Chemical composition was analysed, and OC samples were fermented in vitro with sheep rumen fluid. Increasing storage time up to 6 months decreased sugars and total soluble polyphenols content but increased fibre content in OC. Dry matter effective degradability (DMED) decreased linearly (p < 0.001) by 35.9 and 45.5% as storage time augmented from 1 to 6 months for crude and exhausted OC, respectively. Crude OC had lower DMED values than exhausted OC (averaged values 0.255 and 0.294 g/g, respectively). Both potential production and rate of gas production were lower (p ≤ 0.018) in crude compared with exhausted OC, which was attributed to the high fat content of crude OC (≥86 g/kg dry matter). For samples stored longer than 6 months, cyclone had greater (p < 0.05) DMED than crude and exhausted OC (averaged values 0.207, 0.164 and 0.164 g/g, respectively). The results indicate that ruminal degradability of OC is reduced with advancing storage time, but only subtle changes were observed during the first two months. Cyclone showed greater degradability than crude and exhausted OC, but differences between crude and exhausted OC became negligible after five storage months.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2016-75322-C2-1-RSUBPOVICAPMª Dolores Carro TraviesoUso de subproductos agroindustriales en las dietas de pequeños rumiantes: valoración nutritiva, utilización digestiva, rendimientos productivos y calidad de los productos
Government of SpainAGL2014-56653-C3-1-RUnspecifiedUnspecifiedUnspecified

More information

Item ID: 63618
DC Identifier: http://oa.upm.es/63618/
OAI Identifier: oai:oa.upm.es:63618
DOI: 10.1111/jpn.13149
Official URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/jpn.13149
Deposited by: Memoria Investigacion
Deposited on: 13 Oct 2020 11:02
Last Modified: 13 Oct 2020 11:02
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