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Nutritional evaluation of nitrogen and potassium fertilization of carob tree under dry-farming conditions

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dc.contributor.authorCorreia, P. J.
dc.contributor.authorCorreia, Maribela Pestana
dc.contributor.authorDomingos, I.
dc.contributor.authorMartins Loução, M. A.
dc.date.accessioned2016-01-11T15:10:53Z
dc.date.available2016-01-11T15:10:53Z
dc.date.issued2008
dc.description.abstractThe aim of this work was to assess how potassium (K) and nitrogen (N) fertilization might affect the variation of leaf and fruit nutrient concentrations in carob tree (Ceratonia siliqua L.) under low precipitation. A field study was conducted in 1997, 1998, and 1999 in a calcareous soil. Four fertilization treatments were tested: no fertilizer (C), 0.8kg N tree(-1) (N treatment), 0.83kg K tree(-1) (K treatment), and 0.80kg N tree(-1) plus 0.83kg K tree(-1) (NK treatment). During the hydrological cycle 1998/1999, only 250mm of rain were recorded. Because of this, from 1998 to 1999 a decrease in the concentrations of mobile nutrients N, phosphorus (P), and K and an increase in calcium (Ca), iron (Fe), and manganese (Mn) were observed in leaves. The application of N led to higher leaf N concentration compared with other treatments. This response allowed the establishment of a linear model that relates soil plant analysis development (SPAD) readings with leaf N concentrations (r(2)=0.55; P < 0.05). Compared with leaves, fruits showed similar amounts of N and P; less Ca, Mg, Fe, and Mn; and high concentrations of K. Fertilization did not change considerably the mineral composition of fruits, and because of large variation among trees, yield was similar for all treatments.
dc.identifier.doihttps://dx.doi.org/10.1080/00103620701879075
dc.identifier.issn0010-3624
dc.identifier.otherAUT: PCO01134; FPE00387;
dc.identifier.urihttp://hdl.handle.net/10400.1/7416
dc.language.isoeng
dc.peerreviewedyes
dc.publisherTaylor & Francis Inc.
dc.relation.isbasedonP-004-2VA
dc.titleNutritional evaluation of nitrogen and potassium fertilization of carob tree under dry-farming conditions
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage666
oaire.citation.startPage652
oaire.citation.titleCommunications in soil science and plant analysis
oaire.citation.volume39
person.familyNameCorreia
person.givenNamePedro José
person.identifier.ciencia-id2E15-3704-0F55
person.identifier.orcid0000-0003-4927-1189
person.identifier.scopus-author-id7006210686
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication19507d4e-50e3-4dfa-b5b0-b8703a86d8ee
relation.isAuthorOfPublication.latestForDiscovery19507d4e-50e3-4dfa-b5b0-b8703a86d8ee

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