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Hop dry matter yield and cone quality responses to amino acid and potassium-rich foliar spray applications

2021Journal article Open access
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dc.contributor.authorAfonso, Sandra
dc.contributor.authorArrobas, Margarida
dc.contributor.authorMorais, Jorge Sá
dc.contributor.authorRodrigues, M.A.
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2021-11-22T15:11:40Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2021-11-22T15:11:40Z
dc.date.issued2021
dc.description.abstractThe use of amino acid and K-rich foliar sprays was evaluated in a commercial hop field in North-eastern Portugal. Four applications of an amino acid-rich foliar spray were performed in place of a second side dress N application of “70 kg N ha−1, which is usually applied by the farmer. The K-rich foliar spray was applied once at the cone developing stage as a supplement to the farmer’s fertilization plan. The amino acid-enriched foliar spray maintained crop dry matter yield at the levels of the control treatment and increased cone alpha-acids concentration (41.8% in 2018 and 9.3% in 2019). Foliar K did not increase cone dry matter yield, cone size or bitter acid concentration. Tissue K concentration was not significantly affected by foliar treatments whereas the application of K seemed to increase N uptake, with leaves and stems being the predominant allocation tissues. Both foliar treatments increased leaf and stem Mg concentrations. The results seem to emphasize the importance of amino acids in the biosynthesis of bitter acids, while K and Zn seemed to play an important secondary role, maybe related to N metabolism and its reduction into amino acids. The concentrations of total phenols in cones and leaves were lower in the foliar treatments in comparison to the control, and the higher values registered in leaves. In this study, the use of amino acids as a foliar spray provided an interesting result, since they maintained cone dry matter yield and increased cone bitter acid concentration with reduced N use.en_EN
dc.description.sponsorshipThe authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support by national funds FCT/MCTES to CIMO (UID/AGR/00690/2020) and Sandra Afonso doctoral scholarships (BD/116593/2016).
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationAfonso, Sandra; Arrobas, Margarida; Morais, Jorge S.á.; Rodrigues, M. Ângelo (2021). Hop dry matter yield and cone quality responses to amino acid and potassium-rich foliar spray applications. Journal of Plant Nutrition. ISSN 0190-4167. 44:14, p. 2042-2056en_EN
dc.identifier.doi10.1080/01904167.2021.1889597en_EN
dc.identifier.issn0190-4167
dc.identifier.urihttp://hdl.handle.net/10198/24277
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.relationUID/AGR/00690/2020
dc.relationProdução de lúpulo nacional: uma estratégia para a sustentabilidade
dc.subjectAlpha and beta-acidsen_EN
dc.subjectfoliar fertilizationen_EN
dc.subjecthop dry matter yielden_EN
dc.subjecthop qualityen_EN
dc.subjectHumulus lupulusen_EN
dc.titleHop dry matter yield and cone quality responses to amino acid and potassium-rich foliar spray applicationsen_EN
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleProdução de lúpulo nacional: uma estratégia para a sustentabilidade
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_NORTE/SFRH%2FBD%2F116593%2F2016/PT
oaire.fundingStreamPOR_NORTE
person.familyNameAfonso
person.familyNameArrobas
person.familyNameMorais
person.familyNameRodrigues
person.givenNameSandra
person.givenNameMargarida
person.givenNameJorge Sá
person.givenNameManuel Ângelo
person.identifier2791107
person.identifier.ciencia-idEE17-E2A7-CA4D
person.identifier.ciencia-id971C-B85B-1EC0
person.identifier.ciencia-id6E11-BDED-4CB3
person.identifier.ciencia-id371D-DF0D-8D68
person.identifier.orcid0000-0002-2464-8464
person.identifier.orcid0000-0002-4652-485X
person.identifier.orcid0000-0002-5367-1129
person.identifier.ridHNC-5440-2023
person.identifier.ridO-1721-2016
person.identifier.scopus-author-id56033752100
person.identifier.scopus-author-id8575728800
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
relation.isAuthorOfPublication53395c17-bdda-4f8d-ad73-728075e51889
relation.isAuthorOfPublicationd057ae6b-331c-4980-967d-0ce4fe1bcf8a
relation.isAuthorOfPublicationc2ed0055-91c1-4bf5-acb3-d9a99296d9a2
relation.isAuthorOfPublication43621353-fa11-4559-9b24-27eba5ad3de0
relation.isAuthorOfPublication.latestForDiscoveryc2ed0055-91c1-4bf5-acb3-d9a99296d9a2
relation.isProjectOfPublication5292a067-5512-49bd-b6f9-d4d6dd1352ba
relation.isProjectOfPublication.latestForDiscovery5292a067-5512-49bd-b6f9-d4d6dd1352ba

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