Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1021311
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dc.contributor.authorPAULA NETO, A.pt_BR
dc.contributor.authorFAVARIN, J. L.pt_BR
dc.contributor.authorREIS, A. R. dospt_BR
dc.contributor.authorTEZOTTO, T.pt_BR
dc.contributor.authorALMEIDA, R. E. M. dept_BR
dc.contributor.authorLAVRES JUNIOR, J.pt_BR
dc.contributor.authorGALLO, L. A.pt_BR
dc.contributor.otherANA PAULA NETO, ESALQ; JOSE LAERCIO FAVARIN, ESALQ; ANDRE RODRIGUES DOS REIS, UNESP; TIAGO TEZOTTO, ESALQ; RODRIGO ESTEVAM MUNHOZ DE ALMEIDA, CNPASA; JOSE LAVRES JUNIOR, CENA; LUIZ ANTONIO GALLO, ESALQ.pt_BR
dc.date.accessioned2015-08-04T11:11:11Zpt_BR
dc.date.available2015-08-04T11:11:11Zpt_BR
dc.date.created2015-08-04pt_BR
dc.date.issued2015pt_BR
dc.identifier.other265pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1021311pt_BR
dc.descriptionCoffee plants require high application rates of nitrogen (N) to produce coffee beans. However, information regarding plant N uptake and assimilation under intensive high-technology cultivation systems is scarce, a situation which restrains the maximizing productivity with minimal N rates. The aim of this study was to evaluate N assimilation enzymes such as nitrate reductase (EC 1.6.6.1), glutamine synthetase (EC 6.3.1.2), urease (EC 3.5.1.5), and N compounds of coffee plants during a phenological cycle in response to N applied by fertigation. Our study was carried out with 7-year-old trees of Coffea arabica L., under a center pivot sprinkler irrigation and fertigation system, with five N rates (0, 200, 400, 600, and 800 kg ha−1) applied to the coffee field. The results of the present study suggest that both N metabolism enzymes, and the content of nitrate and ammonium in coffee were directly related to the phenological cycle. The N fertigation rates are correlated with the N and amino acid contente. Nitrate reductase and urease showed higher activities before anthesis and during grain filling. Glutamine synthetase showed highest activities during rapid grain expansion. The data also indicate that there is merit in gaining greater understanding of N metabolism in coffee plants grown under high-intensive systems. There is therefore merit in conducting further research on how monitoring the N assimilation enzymes might be used to improve fertilizer management of coffee in commercial orchards.pt_BR
dc.description.uribitstream/item/127447/1/CNPASA2015-1.pdfpt_BR
dc.languageenpt_BR
dc.language.isoengeng
dc.publisherTheoretical and Experimental Plant Physiology, v. 27, n. 1, p. 41-50, Mar. 2015.pt_BR
dc.relation.ispartofEmbrapa Pesca e Aquicultura - Artigo em periódico indexado (ALICE)pt_BR
dc.titleNitrogen metabolism in coffee plants in response to nitrogen supply by fertigation.pt_BR
dc.typeArtigo em periódico indexado (ALICE)pt_BR
dc.date.updated2017-10-13T11:11:11Zpt_BR
dc.subject.thesagroCafépt_BR
dc.subject.thesagroNitrogêniopt_BR
dc.subject.thesagroUréiapt_BR
dc.subject.thesagroCoffea Arábica.pt_BR
dc.subject.nalthesaurusFertigationpt_BR
dc.subject.nalthesaurusGlutamate-ammonia ligase.pt_BR
dc.ainfo.id1021311pt_BR
dc.ainfo.lastupdate2017-10-13 -03:00:00pt_BR
dc.identifier.doi10.1007/s40626-014-0030-2pt_BR
Appears in Collections:Artigo em periódico indexado (CNPASA)

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