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

Glauber José de Castro Gava, Mauro Wagner de Oliveira, Marcelo de Almeida Silva, Elisangela Marques Jerônimo, Juliana Cristina Sodário Cruz, Paulo Cesar Ocheuze Trivelin

Abstract


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.


Keywords


Zea mays; Nitrogen fertilizer; Isotope technique



DOI: http://dx.doi.org/10.5433/1679-0359.2010v31n4p851

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433 / 1679-0359
E-mail:  semina.agrarias@uel.br
Este obra está licenciado com uma Licença  Creative Commons Atribuição-NãoComercial 4.0 Internacional