Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118934
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dc.contributor.authorSANTOS, A. B. doseng
dc.contributor.authorSILVA, M. A. S. daeng
dc.contributor.authorSILVEIRA, P. M. daeng
dc.contributor.authorCARVALHO, G. D.eng
dc.contributor.authorSTONE, L. F.eng
dc.date.accessioned2020-01-17T18:07:25Z-
dc.date.available2020-01-17T18:07:25Z-
dc.date.created2020-01-17
dc.date.issued2019
dc.identifier.citationRevista Ceres, v. 66, n. 6, p. 422-430, nov./dez. 2019.eng
dc.identifier.issn2177-3491eng
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1118934-
dc.descriptionThe proper nitrogen management is required to achieve high irrigated rice yield. This study aimed to determine the rice response to nitrogen topdressing doses and calibrate the chlorophyll meter reading. Three experiments were conducted in a randomized block design. In the first experiment, five N rates (0, 30, 60, 90, and 120 kg ha-1) were evaluated as the first, and 30 kg ha-1 N as the second topdressing, which were combined with the application of 30 kg ha-1 N as the first and five N rates, as the second topdressing. The other experiments assessed the application of 30 kg ha-1 of N, as the first, and four N rates (0, 40, 80, and 120 kg ha-1), as the second topdressing. There was a response to N application, with maximum technical efficiency reaching 33 kg ha-1 in the first and between 40 and 50 kg ha-1 in the second topdressing. The chlorophyll meter was sensitive to estimate the amount of N to be applied in topdressing, using the nitrogen sufficiency index (NSI). To each percent unit of NSI below 95%, one should apply 10 kg ha-1 of N as the first and 2-3 kg ha-1 of N as the second topdressing.eng
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectNitrogen topdressingeng
dc.titleNitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice.eng
dc.typeArtigo de periódicoeng
dc.date.updated2020-02-13T11:11:11Z
dc.subject.thesagroOryza Sativaeng
dc.subject.thesagroNitrogênioeng
dc.subject.thesagroFertilizante Nitrogenadoeng
dc.subject.thesagroArroz Irrigadoeng
dc.subject.thesagroClorofilaeng
dc.subject.nalthesaurusRiceeng
dc.subject.nalthesaurusIrrigation managementeng
dc.subject.nalthesaurusNitrogen fertilizerseng
dc.subject.nalthesaurusChlorophylleng
dc.subject.nalthesaurusGrain yieldeng
riaa.ainfo.id1118934eng
riaa.ainfo.lastupdate2020-02-13 -02:00:00
dc.identifier.doi10.1590/0034-737X201966060003eng
dc.contributor.institutionALBERTO BAETA DOS SANTOS, CNPAF; MELLISSA ANANIAS SOLER DA SILVA, CNPAF; PEDRO MARQUES DA SILVEIRA, CNPAF; GLAUCILENE DUARTE CARVALHO, SECIMA, Goiânia-GO; LUIS FERNANDO STONE, CNPAF.eng
Appears in Collections:Artigo em periódico indexado (CNPAF)

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