Data/hora: 08/06/2024 12:44:48

Provedor de dados: | 42
País: | Brazil
Título: | Corn grain yield and 15N-fertilizer recovery as a function of urea sidedress timing
Autores: | SCHONINGER,EVANDRO L.; VILLALBA,HUGO A. GONZÁLEZ; BENDASSOLLI,JOSÉ ALBERTINO; TRIVELIN,PAULO CESAR O.
Data: | 2018-12-01
Ano: | 2018
Palavras-chave: | 15N isotope; Nitrogen fertilization; Nitrogen volatilization; Zea mays.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703299
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201820170432
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.90 n.4 2018
Fonte: | info:eu-repo/semantics/openAccess