Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1060196
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dc.contributor.authorCHAVES, A. R. de M.pt_BR
dc.contributor.authorSILVA, D. J.pt_BR
dc.contributor.authorAIDAR, S. de T.pt_BR
dc.contributor.authorSANTOS, L. M.pt_BR
dc.contributor.authorPRADO, K. A. C. dept_BR
dc.contributor.authorCOSTA, B. R. S.pt_BR
dc.date.accessioned2017-02-16T22:51:20Z-
dc.date.available2017-02-16T22:51:20Z-
dc.date.created2017-01-09pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationComunicata Scientiae, v. 7, n. 3, p. 362-371, 2016.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1060196pt_BR
dc.descriptionThe nutrients availability can lead to changes on grapevines physiological behavior, which results in a great importance of studies regarding the application of potassium doses. The aim of this research was to evaluate the ecophysiological behavior of grapevine cultivar ?Syrah? growing under different potassium doses by fertigation, according to the determination of gas exchange, chlorophyll a, fluorescence and pigments index. Five years old plants, grafted on ?Paulsen 1103? rootstock, in a trellis system and planted at the Bebedouro Experimental Field, located in Petrolina, PE, Brazil, were evaluated. The experiment was composed by five potassium doses (0, 20, 40, 80 and 160 kg ha-1), applied by fertigation. The potassium sources were potassium sulfate, potassium nitrate and potassium chloride. The evaluations of the ecophysiologyical parameters were performed at four different times (07am, 10am, 1pm and 3pm) throughout the day on the flowering stage and the first and second fruit growth stages, determining gas exchange and chlorophyll a fluorescence and the pigments index was evaluated at the same grapevines leaves one time. Considering each evaluation period, it was observed that, according to the magnitude of the results for gas exchange, chlorophyll a fluorescence and pigments index, is not possible to indicate the best potassium dose. The climatic conditions during each period of evaluation influenced most the eco-physiological variables than the applied potassium doses, while the changes on pigments index were due to leaves development during the plant cycle.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectFluorescência da clorofilapt_BR
dc.subjectVale do São Franciscopt_BR
dc.subjectEcofisiológiapt_BR
dc.subjectChlorophyll a fluorescencept_BR
dc.titlePotassium doses on the ecophysiological characteristics of Syrah grapevine grown at São Francisco River Valley, Brazil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-02-16T22:51:20Zpt_BR
dc.subject.thesagroUvapt_BR
dc.subject.thesagroFisiologia vegetalpt_BR
dc.subject.thesagroFotossíntesept_BR
dc.subject.thesagroPotássiopt_BR
dc.subject.thesagroVitis Viniferapt_BR
dc.subject.nalthesaurusPhotosynthesispt_BR
riaa.ainfo.id1060196pt_BR
riaa.ainfo.lastupdate2017-02-16pt_BR
dc.identifier.doi10.14295/CS.v7i3.1764pt_BR
dc.contributor.institutionAGNALDO RODRIGUES DE MELO CHAVES, CPATSA; DAVI JOSE SILVA, CPATSA; SAULO DE TARSO AIDAR, CPATSA; LUCIANA MARTINS SANTOS, UPE; KARINNE ALBUQUERQUE CAMPOS DE PRADO, UPE; BRUNO RICARDO SILVA COSTA.pt_BR
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