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Variation of almond yield, biometry, α-tocopherol levels, and antioxidant properties with nitrogen fertilization

2018Journal article Open access
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dc.contributor.authorAires, Alfredo
dc.contributor.authorMorais, Maria Cristina
dc.contributor.authorBarreales, David
dc.contributor.authorRodrigues, M.A.
dc.contributor.authorRibeiro, A.C.
dc.contributor.authorGonçalves, Berta C.C.
dc.contributor.authorSilva, A.P.
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2019-02-04T16:58:34Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2019-02-04T16:58:34Z
dc.date.issued2018
dc.description.abstractA two years’ experiment (2015–2016) was set in a factorial design in which the effect of two application forms of nitrogen (N) (soil and soil + foliar spray) in different doses (0, 25, 50, and 100 kg N ha-1) on almond (Prunus dulcis Mill. cv. “Masbovera”) was evaluated. Kernel yield, biometric properties, phytochemicals, and antioxidant activities were assessed. The results showed that almond kernel yield increases with an increment in N rate doses and was positively correlated with kernel weight and thickness, and negatively with fruit weight. The levels of α-tocopherol and total polyphenol content were higher with lower N doses (25 and 50 kg N ha–1). The antioxidant activities were positively correlated with polyphenol content. Based on our results, excessive N rates over 50 kg/ha depreciate the levels of α-tocopherol, total polyphenols, and antioxidant bioactivities of kernels. Practical applications Almond is an important nut (dry) fruit that contains high levels of α-tocopherol, moderate levels of polyphenols, and high antioxidant activities, all responsible for their claimed health-promoting properties. Almond trees are known by their alternate behavior in which kernel yield and levels of phytochemicals and other compounds are highly variable between years. This article studies the usage of a sustainable nitrogen fertilization program toward a reduction of their alternate behavior, preserving and promoting their antioxidant properties and their levels of phytochemicals, particularly α-tocopherol and polyphenols. Our findings may provide a useful guide for adequate nitrogen fertilization program toward a better almond kernel qualityen_EN
dc.description.sponsorshipThe authors acknowledge the financial support of INTERACT project— “Integrative Research in Environment, Agro‐Chains and Technology,” no. NORTE‐01‐0145‐FEDER‐000017, in its line of research entitled ISAC, co‐financed by the European Regional Development Fund (ERDF) through NORTE 2020 (North Regional Operational Program 2014/2020). The author Alfredo Aires acknowledges the financial support of BPD/UTAD/INTERACT/ISAC/189/2016 scholarship, under the same project. The authors also acknowledge the sup‐ port of European Investment Funds by FEDER/COMPETE/POCI— Operational Competitiveness and Internationalization Programme, under Project POCI‐01‐0145‐FEDER‐006958 and National Funds by FCT—Portuguese Foundation for Science and Technology, under the project UID/AGR/04033/2013. The authors also acknowledge the financial support of European Agricultural and Rural development fund (FEADER) under the Project “Estratégias Integradas para o aumento da produtividade da amendoeira em Trás‐os‐Montes nº 54611, and by Portuguese State through the “Medida 4.1. Cooperação para a Inovação do programa PRODER ‐ Programa de Desenvolvimento Rural.”
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationAires, Alfredo; Morais, Maria Cristina; Barreales, David; Rodrigues, Manuel Ângelo; Ribeiro, António Castro; Gonçalves, Berta; Silva, Ana Paula (2018). Variation of almond yield, biometry, α-tocopherol levels, and antioxidant properties with nitrogen fertilization. Journal of Food Biochemistry. ISSN 0145-8884. 42, p.en_EN
dc.identifier.doi10.1111/jfbc.12685en_EN
dc.identifier.issn0145-8884
dc.identifier.urihttp://hdl.handle.net/10198/18643
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.relationCentre for the Research and Technology of Agro-Environmental and Biological Sciences
dc.subjectAlmondsen_EN
dc.subjectAntioxidantsen_EN
dc.subjectFertilizersen_EN
dc.subjectNitrogenen_EN
dc.subjectPhytonutrientsen_EN
dc.titleVariation of almond yield, biometry, α-tocopherol levels, and antioxidant properties with nitrogen fertilizationen_EN
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for the Research and Technology of Agro-Environmental and Biological Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FAGR%2F04033%2F2013/PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameBarreales
person.familyNameRodrigues
person.familyNameRibeiro
person.givenNameDavid
person.givenNameManuel
person.givenNameAntónio C.
person.identifier.ciencia-idFA16-8DE7-6968
person.identifier.ciencia-id371D-DF0D-8D68
person.identifier.ciencia-id9D19-E833-BE97
person.identifier.orcid0000-0002-8425-0167
person.identifier.orcid0000-0002-5367-1129
person.identifier.orcid0000-0002-8280-9027
person.identifier.ridO-1721-2016
person.identifier.scopus-author-id57202136257
person.identifier.scopus-author-id35270106800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
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relation.isAuthorOfPublication43621353-fa11-4559-9b24-27eba5ad3de0
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relation.isProjectOfPublication.latestForDiscovery7abf1426-8d8b-4027-a2fc-92442b719ad0

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