MONITORING NITROGEN NUTRITION IN COTTON

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dc.contributor.authorRosolem, Ciro Antonio [UNESP]
dc.contributor.authorvan Mellis, Vanessa
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T13:20:09Z
dc.date.available2014-05-20T13:20:09Z
dc.date.issued2010-09-01
dc.description.abstractBoth N excess and deficiency may affect cotton yield and quality. It would therefore be useful to base the N management fertilization on the monitoring of the nutritional status. This study investigated the correlations among the following determination methods of the N nutritional status of cotton (Gossypium hirsutum L., var. Latifolia): chlorophyll readings (SPAD-502 (R), Minolta), specific-ion nitrate meter (Nitrate Meter C-141, Horiba-Cardy (R)), and laboratory analysis (conventional foliar diagnosis). Samples were taken weekly from two weeks before flowering to the fifth week after the first flower. The experiment was conducted on the Fazenda Santa Tereza, Itapeva, State of São Paulo, Brazil. The crop was fertilized with 40 kg ha(-1) N at planting and 0, 30, 60, 90, and 120 kg ha(-1) of side-dressed N. The range of leaf N contents reported as adequate for samples taken 80-90 days after plant emergence (traditional foliar diagnosis) may be used as reference from the beginning of flowering when the plant is not stressed. Specific-ion nitrate meter readings can be used as a nutritional indicator of cotton nutrition from one week after pinhead until the third week of flowering. In this case, plants are well-nourished when readings exceed 8,000 mg L(-1) NO(3)(-). The chlorophyll meter can also be used to estimate the nutritional status of cotton from the third week of flowering. In this case the readings should be above 48 in well-nourished plants.en
dc.description.affiliationUniv Estadual Paulista, USP, Dept Prod Vegetal, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationUSP, Acad Agron, Fac Ciencias Agron, Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, USP, Dept Prod Vegetal, BR-18603970 Botucatu, SP, Brazil
dc.format.extent1601-1607
dc.identifierhttp://dx.doi.org/10.1590/S0100-06832010000500013
dc.identifier.citationRevista Brasileira de Ciência do Solo. Vicosa: Soc Brasileira de Ciência do Solo, v. 34, n. 5, p. 1601-1607, 2010.
dc.identifier.doi10.1590/S0100-06832010000500013
dc.identifier.fileS0100-06832010000500013.pdf
dc.identifier.issn0100-0683
dc.identifier.lattes5720775873259528
dc.identifier.orcid0000-0003-2001-0874
dc.identifier.scieloS0100-06832010000500013
dc.identifier.urihttp://hdl.handle.net/11449/5532
dc.identifier.wosWOS:000285507000013
dc.language.isoeng
dc.publisherSociedade Brasileira de Ciência do Solo
dc.relation.ispartofRevista Brasileira de Ciência do Solo
dc.relation.ispartofjcr0.799
dc.relation.ispartofsjr0,679
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectfertilizeren
dc.subjectGossypium hirsutumen
dc.subjectfoliar diagnosisen
dc.subjectnutritional statusen
dc.titleMONITORING NITROGEN NUTRITION IN COTTONen
dc.typeArtigo
dcterms.rightsHolderSoc Brasileira de Ciência do Solo
unesp.author.lattes5720775873259528[1]
unesp.author.orcid0000-0003-2001-0874[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agronômicas, Botucatupt
unesp.departmentProdução e Melhoramento Vegetal - FCApt

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Botucatu - FCA - Faculdade de Ciências Agronômicas