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Olive response to potassium applications under different water regimes and cultivars

2018Journal article Open access
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dc.contributor.authorFerreira, Isabel Q.
dc.contributor.authorArrobas, Margarida
dc.contributor.authorMoutinho-Pereira, José
dc.contributor.authorCorreia, Carlos M.
dc.contributor.authorRodrigues, M.A.
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2019-02-04T17:00:17Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2019-02-04T17:00:17Z
dc.date.issued2018
dc.description.abstractAlthough potassium (K) is a macronutrient few studies have evaluated the response of olive tree to K fertilization. In this work results of two field and two pot K fertilizer experiments are presented. One of the field trials was conducted in a commercial young olive grove. The second was conducted in a plantation purposely established for this study. In the two fieldand thefirst potexperiment,theK supply was the single variation factor. The second pot experiment was arranged as a factorial with two K rates, two water regimes and two cultivars (‘Arbequina’ and ‘Cobranc¸osa’). K supply did not increase olive tree growth or yield. Accumulated olive yield in the first field experiment, for instance, varied from 2.46 and 2.84 kg tree-1, respectively in K treated and untreated plants. K supply increased the shoot/root ratio (1.6–2.0 from the control to the most fertilized treatment) and the concentration of K in roots (2.9–11.2 g kg-1) to a greater extent than in leaves (7.0–11.9 g kg-1), suggesting that shoots are a priority sink for K and roots may store the nutrient as a reserve. Plant water status and chlorophyll a fluorescence were not significantly affected by K applications. Plants suffering from water stress yielded less phytomass (40.2–56.4 g pot-1, respectively in control and well-watered plants) and showed higher K concentrations in leaves (14.2–11.6 g kg-1) and lower in roots (4.9–6.8 g kg-1) which is probably due to the reduction of K uptake from the dry soil. ‘Cobranc¸osa’ appeared to be more tolerant to water stress than ‘Arbequina’. These experiments showed a poor response of olive tree to K fertilization. Considering that K is usually applied by farmers every year, it seems that further studies on K fertilizationin olive are needed in order to adjust K fertilizer rates to crop needs.en_EN
dc.description.sponsorshipThe authors are grateful to the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financial support to CIMO (UID/AGR/00690/2013). The work was also funded by the 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). For authors integrated in the CITAB research centre, it was further financed by the FEDER/ COMPETE/POCI—Operational Competitiveness and Internationalization Programme, under Project POCI-01-0145- FEDER-006958, and by National Funds of FCT–Portuguese Foundation for Science and Technology, under the Project UID/ AGR/04033/2013.
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationFerreira, Isabel Q.; Arrobas, Margarida; Moutinho-Pereira, José; Correia, Carlos; Rodrigues, M.A. (2018). Olive response to potassium applications under different water regimes and cultivars. Nutrient Cycling in Agroecosystems. ISSN 1385-1314. 112, p. 387-401en_EN
dc.identifier.doi10.1007/s10705-018-9954-2en_EN
dc.identifier.issn1385-1314
dc.identifier.urihttp://hdl.handle.net/10198/18656
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.relationNORTE-01-0145-FEDER-000017
dc.relationPOCI-01-0145-FEDER-006958
dc.subjectChlorophyll a fluorescenceen_EN
dc.subjectLeaf water statusen_EN
dc.subjectOJIP testen_EN
dc.subjectOlea europaeaen_EN
dc.subjectSoil K statusen_EN
dc.titleOlive response to potassium applications under different water regimes and cultivarsen_EN
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F04033%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F00690%2F2013/PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameArrobas
person.familyNameRodrigues
person.givenNameMargarida
person.givenNameManuel Ângelo
person.identifier.ciencia-id971C-B85B-1EC0
person.identifier.ciencia-id371D-DF0D-8D68
person.identifier.orcid0000-0002-4652-485X
person.identifier.orcid0000-0002-5367-1129
person.identifier.ridO-1721-2016
person.identifier.scopus-author-id8575728800
person.identifier.scopus-author-id35270106800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
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relation.isAuthorOfPublication.latestForDiscovery43621353-fa11-4559-9b24-27eba5ad3de0
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