Reducing the impact of feedstuff transport by a better utilization of plant wastes for livestock: a way to improve meat quality?

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dc.check.opt-outNot applicableen
dc.check.reasonThis thesis is due for publication or the author is actively seeking to publish this materialen
dc.contributor.advisorKerry, Joseph P.en
dc.contributor.advisorO'Grady, Michaelen
dc.contributor.advisorAlessandro, Prioloen
dc.contributor.advisorLuciano, Giuseppeen
dc.contributor.authorSalami, Saheed A.
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2019-01-14T09:46:34Z
dc.date.issued2019
dc.date.submitted2019
dc.description.abstractThe effect of feeding plant by-products (cardoon meal (CM), dried corn gluten feed (CGF), corn (CDGS) and wheat (WDGS) distillers’ grains with solubles, and citrus pulp (DCP)) on the quality of meat from ruminant animals (lambs and beef cattle) was investigated. The first experiment examined the response of rumen function to diets rich in phenolic compounds (i.e. tannins), which are secondary metabolites prevalent in several plant by-products. Concentrate diet supplemented with 4% of two hydrolysable (chestnut and tara) and condensed (mimosa and gambier) tannin extracts did not impair ruminal fermentation traits and microbiome in lambs. The second and third experiments indicated that replacement of 15% dehydrated alfalfa with CM did not influence lamb performance and carcass traits. Feeding CM promoted ruminal biohydrogenation of fatty acids (FA) through a modulation of the rumen bacterial community and consequently, reduced the proportion of t-11 18:1 and c-9,t-11 conjugated linoleic acid (CLA) in lamb meat. Moreover, dietary CM did not influence the oxidative stability of lamb meat whereas a phenolic-rich CM extract reduced lipid oxidation in an ovine muscle model system. The fourth, fifth and sixth experiments assessed the quality indices of beef from grass silage-fed steers offered concentrate supplements in which barley/soybean meal was replaced with varying levels of CGF (25%, 50% and 75%), CDGS and WDGS (80%), and DCP (40% and 80%), respectively. The inclusion of up to 75% CGF improved the FA profile of beef by decreasing the proportion of C14:0 and increasing CLA, C18:3 n-3, C20:5 n-3 and C22:5 n-3 without negatively influencing the shelf-life and eating quality of beef. Dietary CDGS or WDGS increased the proportion of CLA and total polyunsaturated fatty acids (PUFA) in beef but decreased beef shelf-life by increasing lipid oxidation and discolouration in fresh beef patties stored in modified atmosphere packs (80% O2:20% CO2). The inclusion of up to 80% DCP improved the FA profile of beef by increasing the percentage of CLA and PUFA in beef without compromising the oxidative stability and consumer acceptability of beef.en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Version
dc.format.mimetypeapplication/pdfen
dc.identifier.citationSalami, S. A. 2019. Reducing the impact of feedstuff transport by a better utilization of plant wastes for livestock: a way to improve meat quality? PhD Thesis, University College Cork.en
dc.identifier.endpage352en
dc.identifier.urihttps://hdl.handle.net/10468/7289
dc.language.isoenen
dc.publisherUniversity College Corken
dc.rights© 2019, Saheed Ayodeji Salami.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectAnimal dieten
dc.subjectRuminal biohydrogenationen
dc.subjectFatty acidsen
dc.subjectBeefen
dc.subjectLamb meaten
dc.subjectOxidative stabilityen
dc.thesis.opt-outfalse
dc.titleReducing the impact of feedstuff transport by a better utilization of plant wastes for livestock: a way to improve meat quality?en
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhDen
ucc.workflow.supervisormichael.ogrady@ucc.ie
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