| Registro completo |
| Provedor de dados: |
Anais da ABC (AABC)
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| País: |
Brazil
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| Título: |
Corn grain yield and 15N-fertilizer recovery as a function of urea sidedress timing
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| Autores: |
SCHONINGER,EVANDRO L.
VILLALBA,HUGO A. GONZÁLEZ
BENDASSOLLI,JOSÉ ALBERTINO
TRIVELIN,PAULO CESAR O.
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| Data: |
2018-12-01
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| Ano: |
2018
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| Palavras-chave: |
15N isotope
Nitrogen fertilization
Nitrogen volatilization
Zea mays
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| Resumo: |
Abstract Best fertilizer management practices such as adopting the right N sidedress timing can reduce N losses by volatilization, thus, raising N-fertilizer recovery and grain yield. To evaluate ammonia (N-NH3 ) losses, N-fertilizer recovery and grain yield as a function of urea sidedress timing in corn, a field study was conducted during the 2011-2012 and 2012-2013 growing seasons, adopting a complete randomized block design with four replications. Treatments consisted of urea sidedress timing (140 kg N ha-1) at V4, V6, V8, V10, and V12 growth stages, plus a control without sidedress N. The largest N losses by N-NH3 volatilization occurred when urea was applied at V10 or V12 growth stages, reaching losses of 35 and 41 % of the total applied N. Although climatic factors influences N-NH3 volatilization process, crop characteristics such as canopy development also seems to affect N-NH3 losses. Nitrogen application at V4 or V6 growth stages resulted in greater N-fertilizer recovery from urea sidedress, reaching values of 53 %. No increase in corn grain yield was observed with N application at different corn growth stages during the two growing seasons evaluated, most likely due to high N mineralization rates from the soil.
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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=S0001-37652018000703299
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| Editor: |
Academia Brasileira de Ciências
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| Relação: |
10.1590/0001-3765201820170432
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| Formato: |
text/html
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| Fonte: |
Anais da Academia Brasileira de Ciências v.90 n.4 2018
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| Direitos: |
info:eu-repo/semantics/openAccess
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