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	Provedor de dados PAB (1) Rev. Bras. Ciênc. Solo (1) Autor Maia,Suelen Cristina Mendonça (2) Soratto,Rogério Peres (2) Almeida,Adriana Queiroz de (1) Freitas,Lucas Barbosa de (1) Liebe,Suzane Maria (1) Nastaro,Beatriz (1) Mais... Palavra-chave Phaseolus vulgaris (2) Relative chlorophyll index (2) Chlorophyll (1) Chlorophyll meter (1) Diagnostic leaf (1) Nitrogen fertilization (1) Nitrogen sufficiency index (1) Nitrogen use efficiency (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (1) 2012 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Criteria for topdressing nitrogen application to common bean using chlorophyll meter PAB Maia,Suelen Cristina Mendonça; Soratto,Rogério Peres; Liebe,Suzane Maria; Almeida,Adriana Queiroz de. Abstract: The objective of this work was to establish the diagnostic leaf and the nitrogen sufficiency index (NSI) values most appropriate to estimate N requirement by the 'Pérola' common bean (Phaseolus vulgaris), based on chlorophyll meter monitoring. The diagnostic leaf was defined in an experiment with five N rates, and up to four sampling dates of the diagnostic leaves were evaluated (first, second, and third completely expanded leaves from the apex). The NSI was established in two crop seasons, under six N managements: M1, 40 kg ha-1 N at sowing + 80 kg ha-1 10 days after emergence (DAE) + 80 kg ha-1 20 DAE (reference rate); M2, 20 kg ha-1 at sowing + 40 kg ha-1 10 DAE + 40 kg ha-1 20 DAE (recommended rate); M3, 20 kg ha-1 at sowing + 30 kg ha-1 when... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Diagnostic leaf; Nitrogen fertilization; Nitrogen sufficiency index; Nitrogen use efficiency; Relative chlorophyll index. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000700512 The nitrogen sufficiency index underlying estimates of nitrogen fertilization requirements of common bean Rev. Bras. Ciênc. Solo Maia,Suelen Cristina Mendonça; Soratto,Rogério Peres; Nastaro,Beatriz; Freitas,Lucas Barbosa de. Chlorophyll determination with a portable chlorophyll meter can indicate the period of highest N demand of plants and whether sidedressing is required or not. In this sense, defining the optimal timing of N application to common bean is fundamental to increase N use efficiency, increase yields and reduce the cost of fertilization. The objectives of this study were to evaluate the efficiency of N sufficiency index (NSI) calculated based on the relative chlorophyll index (RCI) in leaves, measured with a portable chlorophyll meter, as an indicator of time of N sidedressing fertilization and to verify which NSI (90 and 95 %) value is the most appropriate to indicate the moment of N fertilization of common bean cultivar Perola. The experiment was carried out in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Chlorophyll; Relative chlorophyll index; Chlorophyll meter. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100019 Registros recuperados: 2 Primeira ... 1 ... Última

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