Corn grain yield and 15N-fertilizer recovery as a function of urea sidedress timing



Título del documento: Corn grain yield and 15N-fertilizer recovery as a function of urea sidedress timing
Revista: Anais da Academia Brasileira de Ciencias
Base de datos: PERIÓDICA
Número de sistema: 000435616
ISSN: 0001-3765
Autores: 1
2
3
3
Instituciones: 1Universidade do Estado de Mato Grosso, Campus Universitario de Nova Mutum, Nova Mutum, Mato Grosso. Brasil
2Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil
3Universidade de Sao Paulo, Centro de Energia Nuclear na Agricultura, Piracicaba, Sao Paulo. Brasil
Año:
Periodo: Dic
Volumen: 90
Número: 4
Paginación: 3299-3312
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés 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
Disciplinas: Agrociencias
Palabras clave: Gramíneas,
Fertilización,
Maíz,
Fertilizantes nitrogenados,
Rendimiento de grano,
Urea,
Zea mays
Keyword: Gramineae,
Fertilization,
Corn,
Nitrogen fertilization,
Grain yield,
Urea,
Zea mays
Texto completo: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703299&lng=en&nrm=iso&tlng=en