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dc.contributor.authorLOPES, M. N.pt_BR
dc.contributor.authorLACERDA, C. F. dept_BR
dc.contributor.authorCÂNDIDO, M. J. D.pt_BR
dc.contributor.authorPOMPEU, R. C. F. F.pt_BR
dc.contributor.authorSILVA, R. G. dapt_BR
dc.contributor.authorLOPES, J. W. B.pt_BR
dc.contributor.authorFERNANDES, F. R. B.pt_BR
dc.contributor.authorBEZERRA, F. M. L.pt_BR
dc.date.accessioned2011-09-02T11:11:11Zpt_BR
dc.date.available2011-09-02T11:11:11Zpt_BR
dc.date.available2011-09-02T11:11:11Zpt_BR
dc.date.created2011-09-02pt_BR
dc.date.issued2011pt_BR
dc.identifier.citationRevista Brasileira de Zootecnia, v. 40, n. 9, p. 1862-1869, 2011.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/899510pt_BR
dc.descriptionThe objective of this study was to evaluate gas exchange in the massai grass during establishment and regrowth cycles in a greenhouse, using five nitrogen (N) fertilization levels. A completely randomized split-plot design of five nitrogen levels (0; 150; 300; 450 and 600 mg N?dm-3 of soil) was employed with the N levels as plots, and the cycles (establishment, regrowth 1 and 2) as subplots, evaluated with five replicates. We evaluated leaf transpiration (E), leaf temperature (TFOL), leaf photosynthesis rate (A), leaf carbon dioxide concentration (Ci), stomatal conductance (gs), photosynthesis/transpiration ratio (A/E), photosynthesis/conductance ratio (A/gs), chlorophyll relative index (CRI), and nitrogen sufficiency index (NSI). Growth cycles influenced all physiological characteristics, except for NSI. N fertilization levels affected TFOL, A, CRI and NSI variables, whereas for gs, E, Ci, A/E and A/gs it did not occur. A increased from 6.38 to 10.33 μmol?m-2. s-1, at levels 0 and 600 mg N?dm-3 of soil, respectively. Gas exchange in the massai grass was favored by nitrogen fertilization, since the cycles amended these characteristics of the grass.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectFortalezapt_BR
dc.subjectVariedade Massaipt_BR
dc.subjectCearápt_BR
dc.titleGas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2019-09-23T11:11:11Zpt_BR
dc.subject.thesagroPanicum maximumpt_BR
dc.subject.thesagroPastagempt_BR
dc.subject.thesagroGramínea forrageirapt_BR
dc.subject.nalthesaurusChlorophyllpt_BR
dc.subject.nalthesaurusPhotosynthesispt_BR
dc.subject.nalthesaurusBrazilpt_BR
riaa.ainfo.id899510pt_BR
riaa.ainfo.lastupdate2019-09-23 -03:00:00pt_BR
dc.contributor.institutionMarcos Neves Lopes, Universidade Federal do Ceará - UFC, Fortaleza, CE.; Claudivan Feitosa de Lacerda, UFC, Fortaleza, CE.; Magno José Duarte Cândido, UFC. Fortaleza, CE.; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; Rodrigo Gregório da Silva, Instituto Federal de Educação, Ciência e Tecnologia - IFCE, Campus Avançado do Tauá, CE.; José Wellington Batista Lopes, UFC, Fortaleza, CE.; Francisco Ronaldo Belém Fernandes, UFC, Fortaleza, CE.; Francisco Marcus Lima Bezerra, UFC, Fortaleza, CE.pt_BR
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