| Registro completo |
| Provedor de dados: |
Scientia Agricola
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| País: |
Brazil
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| Título: |
Grain yield, efficiency and the allocation of foliar N applied to soybean canopies
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| Autores: |
Oliveira,Silas Maciel de
Pierozan Junior,Clovis
Lago,Bruno Cocco
Almeida,Rodrigo Estevam Munhoz de
Trivelin,Paulo Cesar Ocheuze
Favarin,José Laércio
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| Data: |
2019-07-01
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| Ano: |
2019
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| Palavras-chave: |
Glycine max (L.) Merr
Foliar N fertilization
15N tracer
Foliar application
Nitrogen recovery efficiency
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| Resumo: |
ABSTRACT: Soybean [Glycine max (L.) Merr.] grain yield is closely associated with the level of optimal nitrogen (N) supply, especially during the reproductive stages. Foliar fertilization with low rates of N have been considered as a strategy for furnishing additional N and enhancing grain yields. Field studies using 15N tracer were conducted over two growing seasons to investigate the impact of foliar N fertilization on grain yield, plant N content, the amount of N derived from fertilizer (NDFF) and N recovery efficiency (NRE). Four foliar N rates (0, 1300, 2600 and 3900 g ha−1) were supplied by two equal split applications at the R1 and R3 stages. Foliar N fertilization of soybean canopies did not affect grain yield, grain N content, shoot N content nor plant N content. Total NDFF was increased from 0.7 to 2.0 kg ha−1 across the N rates. Nonetheless, NRE was unaffected by foliar N fertilization, which averaged 53 %. Soybean plants allocated the same amount of N fertilizer to both grains and shoots. No significant effects of low rate foliar N fertilization were registered on soybean grain yield nor plant N content, despite considerable N fertilizer recovery by plant organs.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400305
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| Editor: |
São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
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| Relação: |
10.1590/1678-992x-2017-0395
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| Formato: |
text/html
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| Fonte: |
Scientia Agricola v.76 n.4 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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