Economic analysis of source and rates nitrogen fertilization in second corn crop in no-till system

• Autor(a) principal: Souza, Juliana Aparecida
• Data de Publicação: 2016
• Outros Autores: Moreira, Adônis, buzetti, Salatier
• 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/1921

The nitrogen (N) is the most required nutrient to crop corn (Zea mays L.), however there are few studies on its use in second harvest crops. . This work aim to determinate the economical viability of the usage of several sources and rates of nitrogen in the productivity of second corn crop in no-till system. The experiment was developed in in an Oxisol, in agricultural years of 2007 and 2008. The treatments were composed of three N sources [Ammonium sulfonitrate with nitrification inhibitor (ASN + I), ammonium sulfate (AS), and urea] in five N rates (0, 50, 100, 150 and 200 kg ha-1), totally applied in the coverage, in six leaf stage (V6). For the economical analysis were considered the N fertilization costs and the yield additions provided by the N fertilization handling for each relative treatment. Although the nitrogen fertilization provided increase in productivity of second crop corn in no-till system not always the increase was sufficient to cover the costs and provide profitability. The cover nitrogen fertilization at rate the 100 and 150 kg ha-1 of N as SA or ureia provided good profitability in the second corn crop in no-till system.