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Spatiotemporal modelling of the quality and ripening of two cultivars of "Algarve Citrus" orchards at different edaphoclimatic conditions

2021-02Journal article Restricted access
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dc.contributor.authorCavaco, Ana M.
dc.contributor.authorCruz, Sandra P.
dc.contributor.authorAntunes, M. Dulce
dc.contributor.authorGuerra, Rui
dc.contributor.authorPires, Rosa
dc.contributor.authorAfonso, Andreia M.
dc.contributor.authorBrazio, António
dc.contributor.authorSilva, Leonardo
dc.contributor.authorLucas, Marcia Rosendo
dc.contributor.authorDaniel, Mariana
dc.contributor.authorPanagopoulos, Thomas
dc.date.accessioned2021-09-08T10:58:09Z
dc.date.available2021-09-08T10:58:09Z
dc.date.issued2021-02
dc.description.abstractAlgarve Citrus are non-climacteric Protected Geographical Indication (PGI) commodities. They are harvested with minimal levels of juice content (>35 %), soluble solids content (SSC) (>10 %) and maturation index (MI) (>8), as required by the respective PGI normative reference. These internal quality attributes (IQA) are usually determined in small samples of fruit collected from the orchards close to harvest. This study aimed to use geostatistics to help predict the optimal harvest date (OHD) of two sweet orange (Citrus sinensis (L.) Osbeck) cultivars, namely, 'Newhall', and 'Valencia Late', at two different edaphoclimatic conditions observed in the locations of Quarteira, at the coast, and Paderne, near a mountainous area. Two orchards of 0.5-0.7 ha per cultivar were chosen and a total of 25 trees were georeferenced within each orchard, comprising 100 sampling points/trees. Firmness, juice content, SSC and MI of fruit were determined through time. In general, the fruit grown in Quarteira showed higher SSC and MI and lower firmness values, ripening two months earlier than those grown in Paderne, although the full effect of the various edaphoclimatic factors on these results are not fully understood. However, geospatial modelling of ripening has shown a large variability within the orchards, with some IQA evolution patterns observed in some orchards and/or cultivars but not in the others. Specifically, 1) a negative correlation between the firmness and MI spatial patterns; 2) a variable decay rate of firmness, much faster in Paderne for 'Valencia Late'; 3) local minima in juice content, below 35 %, observed in restricted spatial areas and in specific time periods, and which were clearer in 'Newhall'. These local variations highlight the need for an optimized management based on geospatial modelling. For example, the variable decay rate of firmness must be taken into account during fruit harvest and postharvest handling. On the other side, the observation of localized plots with juice content below 35 % must be contextualized in the broader picture of the entire orchard which, in the present study, always had consistent temporal average level above 35 %. This study has provided evidence that fruit ripening variability should be considered in the site-specific orchard management of citrus to optimize their harvest date.
dc.description.sponsorshipFCT - Fundacao para a Ciencia e a Tecnologia, PortugalPortuguese Foundation for Science and Technology [UID/Multi/00631/2013]; NIBAP: Nucleo de Investigacao em Biotecnologia e Agricultura de Precisao [ALG-01-0247-FEDER-037303]; FCT - Fundacao para a Ciencia e a TecnologiaPortuguese Foundation for Science and Technology [DL 57/2016/CP1361/CT0031]
dc.description.sponsorshipALG-01-0247-FEDER-037303
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.postharvbio.2020.111386
dc.identifier.issn0925-5214
dc.identifier.urihttp://hdl.handle.net/10400.1/17044
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationCenter for Electronics, Optoelectronics and Telecommunications
dc.relationNot Available
dc.subjectGeostatistics
dc.subjectGeographic information system
dc.subjectOptimal
dc.subjectHarvest date
dc.subjectRipening spatial variability
dc.subjectSite-specific orchard management
dc.subject.otherAgriculture; Food Science & Technology
dc.titleSpatiotemporal modelling of the quality and ripening of two cultivars of "Algarve Citrus" orchards at different edaphoclimatic conditions
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCenter for Electronics, Optoelectronics and Telecommunications
oaire.awardTitleNot Available
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F00631%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/DL 57%2F2016/DL 57%2F2016%2FCP1361%2FCT0031/PT
oaire.citation.startPage111386
oaire.citation.titlePostharvest Biology and Technology
oaire.citation.volume172
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamDL 57/2016
person.familyNameCavaco Guerra
person.familyNameCruz
person.familyNameAntunes
person.familyNameGuerra
person.familyNamePires
person.familyNameGuedes da Silva Afonso
person.familyNameBrazio
person.familyNameMendes e Silva
person.familyNameDaniel
person.familyNamePanagopoulos
person.givenNameAna Margarida
person.givenNameSandra P.
person.givenNameMaria Dulce
person.givenNameRui
person.givenNameRosa
person.givenNameAndreia Melissa
person.givenNameAntónio
person.givenNameLeonardo
person.givenNameMariana
person.givenNameThomas
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person.identifier.scopus-author-id9736690000
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.rightsrestrictedAccess
rcaap.typearticle
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