Consulta: subjectFacets:"Nitrogen sufficiency index"
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Data/hora: 03/06/2024 04:35:56

Criteria for topdressing nitrogen application to common bean using chlorophyll meter
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: 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