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Assessment of potato peel and agro-forestry biochars supplementation on in vitro ruminal fermentation

2020-07-28Artigo científico Acesso aberto
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dc.contributor.authorRodrigues, Ana R. F.
dc.contributor.authorMaia, Margarida R. G.
dc.contributor.authorCabrita, Ana R. J.
dc.contributor.authorOliveira, Hugo M.
dc.contributor.authorBernardo, Maria
dc.contributor.authorLapa, Nuno
dc.contributor.authorFonseca, Isabel
dc.contributor.authorTrindade, Henrique
dc.contributor.authorPereira, José L.
dc.contributor.authorFonseca, António J. M.
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.pblPeerJ Inc.
dc.date.accessioned2020-12-22T05:17:19Z
dc.date.available2020-12-22T05:17:19Z
dc.date.issued2020-07-28
dc.descriptionUIDB/50006/2020 UIDB/04033/2020 grant ref. PDE/BDE/114434/2016 DL 57/2016 -Norma transitória.
dc.description.abstractBackground. The awareness of environmental and socio-economic impacts caused by greenhouse gas emissions from the livestock sector leverages the adoption of strategies to counteract it. Feed supplements can play an important role in the reduction of the main greenhouse gas produced by ruminants-methane (CH4). In this context, this study aims to assess the effect of two biochar sources and inclusion levels on rumen fermentation parameters in vitro. Methods. Two sources of biochar (agro-forestry residues, AFB, and potato peel, PPB) were added at two levels (5 and 10%, dry matter (DM) basis) to two basal substrates (haylage and corn silage) and incubated 24-h with rumen inocula to assess the effects on CH4 production and main rumen fermentation parameters in vitro. Results. AFB and PPB were obtained at different carbonization conditions resulting in different apparent surface areas, ash content, pH at the point of zero charge (pHpzc), and elemental analysis. Relative to control (0% biochar), biochar supplementation kept unaffected total gas production and yield (mL and mL/g DM, pD0.140 and pD0.240, respectively) and fermentation pH (p D 0.666), increased CH4 production and yield (mL and mL/g DM, respectively, pD0.001) and ammonia-N (NH3-N, pD0.040), and decreased total volatile fatty acids (VFA) production (p < 0.001) and H2 generated and consumed (p ≤ 0.001). Biochar sources and inclusion levels had no negative effect on most of the fermentation parameters and efficiency. Acetic.propionic acid ratio (pD0.048) and H2 consumed (pD0.019) were lower with AFB inclusion when compared to PPB. Biochar inclusion at 10% reduced H2 consumed (p < 0.001) and tended to reduce total gas production (pD0.055). Total VFA production (pD0.019), acetic acid proportion (pD0.011) and H2 generated (pD0.048) were the lowest with AFB supplemented at 10%, no differences being observed among the other treatments. The basal substrate affected most fermentation parameters independently of biochar source and level used. Discussion. Biochar supplementation increased NH3-N content, iso-butyric, iso-valeric and valeric acid proportions, and decreased VFA production suggesting a reduced energy supply for microbial growth, higher proteolysis and deamination of substrate N, and a decrease of NH3-N incorporation into microbial protein. No interaction was found between substrate and biochar source or level on any of the parameters measured. Although AFB and PPB had different textural and compositional characteristics, their effects on the rumen fermentation parameters were similar, the only observed effects being due to AFB included at 10%. Biochar supplementation promoted CH4 production regardless of the source and inclusion level, suggesting that there may be other effects beyond biomass and temperature of production of biochar, highlighting the need to consider other characteristics to better identify the mechanism by which biochar may influence CH4 production.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent211748
dc.identifier.doi10.7717/peerj.9488
dc.identifier.issn2167-8359
dc.identifier.otherPURE: 26410486
dc.identifier.otherPURE UUID: e5f9d2f3-74dc-4ae9-967d-efe069863f57
dc.identifier.otherScopus: 85095759660
dc.identifier.otherPubMed: 33194323
dc.identifier.otherPubMedCentral: PMC7394066
dc.identifier.otherWOS: 000552899800002
dc.identifier.otherORCID: /0000-0001-7862-7477/work/85620954
dc.identifier.otherORCID: /0000-0002-5823-6636/work/164706174
dc.identifier.urihttp://hdl.handle.net/10362/109142
dc.identifier.urlhttps://www.scopus.com/pages/publications/85095759660
dc.language.isoeng
dc.peerreviewedyes
dc.subjectAgro-forestry biochar
dc.subjectEnteric methane
dc.subjectPotato peel biochar
dc.subjectRumen fermentation
dc.subjectSupplementation level
dc.subjectGeneral Neuroscience
dc.subjectGeneral Biochemistry,Genetics and Molecular Biology
dc.subjectGeneral Agricultural and Biological Sciences
dc.titleAssessment of potato peel and agro-forestry biochars supplementation on in vitro ruminal fermentationen
dc.typejournal article
degois.publication.titlePeerJ
degois.publication.volume8
dspace.entity.typePublication
rcaap.rightsopenAccess

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