Nutritional value of crude and partially defatted olive cake in finishing pigs and effects on nitrogen balance and gaseous emissions

Ferrer, Pablo and Garcia Rebollar, Pilar and Cerisuelo, A. and Ibáñez Ruiz, Miguel Ángel and Rodríguez Cortés, Carlos Alberto and Calvet, Salvador and Blas Beorlegui, Juan Carlos de (2018). Nutritional value of crude and partially defatted olive cake in finishing pigs and effects on nitrogen balance and gaseous emissions. "Animal Feed Science and Technology", v. 236 ; pp. 131-140. ISSN 0377-8401. https://doi.org/10.1016/j.anifeedsci.2017.12.014.

Description

Title: Nutritional value of crude and partially defatted olive cake in finishing pigs and effects on nitrogen balance and gaseous emissions
Author/s:
  • Ferrer, Pablo
  • Garcia Rebollar, Pilar
  • Cerisuelo, A.
  • Ibáñez Ruiz, Miguel Ángel
  • Rodríguez Cortés, Carlos Alberto
  • Calvet, Salvador
  • Blas Beorlegui, Juan Carlos de
Item Type: Article
Título de Revista/Publicación: Animal Feed Science and Technology
Date: February 2018
ISSN: 0377-8401
Volume: 236
Subjects:
Freetext Keywords: Ammonia emission; Digestion efficiency; Methane emission; Nitrogen balance; Olive cake
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

By-products from the food industry can be valuable ingredients in animal feeds. One example is olive cake (OC), generated in large amounts by the olive oil industry, which contains oil with a high proportion of oleic acid and polyphenols. An experiment was performed using pigs to determine the nutritional value of crude (COC) and partially defatted (PDOC) olive cake, and to evaluate their effect on nutrient balance, slurry properties and potential ammonia (NH3) and methane (CH4) emissions. Five experimental feeds were designed; a basal diet and another four diets produced by substituting 100 or 200 g/kg of the basal diet with either COC or PDOC. Thirty finishing male pigs (76.1 ± 4.2 kg initial BW) were used in the experiment (6 animals/treatment). After a 14-day adaptation period, faeces and urine were collected separately for 7 days to measure nutrient digestibility and the excretory patterns of nitrogen. Potential NH3 and CH4 emissions were measured in reconstituted slurry samples over 11 and 100 days, respectively. The dry matter (DM), crude protein (CP), cellulose, starch and energy coefficients of total tract apparent digestibility (CTTAD) were negative and linearly (P < 0.05) affected by OC inclusion level. However, the type of OC did not influence any of the digestion efficiencies studied. The energy digestibility of the ingredients tested, estimated by substitution, were 0.479 ( ± 0.040, SEM) and 0.327 ( ± 0.049) for COC and PDOC, respectively. Overall, the results indicate a digestible energy (DE) value from COC and PDOC that account respectively for around 80 or 60% of the DE provided by barley grain in pigs. Faecal content of cellulose, polyphenols and gross energy (GE) increased linearly with OC inclusion, whereas ash content decreased. The total N content of urine decreased linearly with OC inclusion, but benzoic and hippuric acid contents increased, which resulted in lower pH values for the OC diets. The ratio between faecal and urine N excretion decreased from 2.48 in the basal diet to 1.01 on average in the 200 g/kg OC diets. As a result, increasing both COC and PDOC levels in diets resulted in lower NH3 emissions per volume of slurry and in a lower biochemical CH4 potential. Although slurry excretion increased with OC inclusion, daily NH3 emissions still decreased with increasing OC inclusion. However potential CH4 emissions per animal increased. A global perspective throughout the production chain is needed to assess the impact of including OC in pig diets on gaseous emissions.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2014-56653CoPigSalvador CalvetEfecto de la inclusión de subproductos en las emisiones de gases en los purines. Evaluación global de los impactos ambientales

More information

Item ID: 54577
DC Identifier: http://oa.upm.es/54577/
OAI Identifier: oai:oa.upm.es:54577
DOI: 10.1016/j.anifeedsci.2017.12.014
Official URL: https://www.sciencedirect.com/science/article/pii/S0377840117311604?via%3Dihub
Deposited by: Memoria Investigacion
Deposited on: 24 Apr 2019 11:31
Last Modified: 24 Apr 2019 11:31
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