Management and cost of urea application in maize grown in northern Paraná state, Brazil

• Autor(a) principal: Pissinati, Aline
• Data de Publicação: 2013
• Outros Autores: de Oliveira, Mariana Alves, Pissinati, Aniele, Moreira, Adônis
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/927

 Urea is the most widely used nitrogen fertilizer in maize. In this study, we aimed to evaluate the agronomic performance of maize under different rates and forms of N application and to identify the economic efficiency provided by this crop in relation to this type of fertilizer. To this end, we conducted a field experiment in a Eutroferric Dark Red Latosol (Oxisol) using the maize cultivar AG 8021. Nine treatments were tested comprising the application of 40, 80, 120, 160, 200, and 240 kg ha–¹ of N (urea) as topdressing; 80 and 120 kg ha–¹ of N as topdressing and incorporated into the soil; and a control treatment containing only the N from the compound at sowing. We assessed the components of production, yield, and economic analysis of urea maximum efficiency with respect to crop yield. The different rates of N used – both as topdressing and incorporated – improved the production and yield components of maize. Nitrogen application rates of 120 kg ha–¹ as topdressing and of 80 kg ha–¹ incorporated into the soil presented greater economic efficiency.