Phytomass production and nitrogen accumulation in maize cultivated with different doses of 15N-urea

• Autor(a) principal: Gava, Glauber José de Castro
• Data de Publicação: 2010
• Outros Autores: Oliveira, Mauro Wagner de, Silva, Marcelo de Almeida, Jerônimo, Elisangela Marques, Cruz, Juliana Cristina Sodário, Trivelin, Paulo Cesar Ocheuze
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/7594
• topic: Zea mays; Nitrogen fertilizer; Isotope technique; Zea mays; Adubação nitrogenada; Técnica isotópica

This work aimed to study the possible alterations in production, accumulation of the vegetative phytomass and nitrogen efficiency use of the maize crop, in different doses of N applied in the fertilization, by using the technique of isotopic dilution of 15N. The completely randomized block experimental design was adopted, with 5 treatments and 4 replicates., The following treatments were constituted in the doses in covering: 0, 50, 100, 150 and 200 kg ha-1 of N, with fertilization of N-urea, respectively. Comparisons among the treatments had been run for crop productivity; nitrogen accumulation for the plant, and use of the nitrogen of the urea-15N for the crop. The increase of the dose of N-fertilizer resulted in increase of the dry matter mass, of the dry matter yield crop tax, of the productivity and accumulation of N in the maize plants.