Data/hora: 20/06/2024 19:29:01

Biblioteca(s): | Embrapa Soja.
Data corrente: | 08/09/2017
Data da última atualização: | 10/01/2018
Autoria: | SATURNO, D. F.; CEREZINI, P.; SILVA FILHO, P. M. da; OLIVEIRA, A. B. de; OLIVEIRA, M. C. N. de; HUNGRIA, M.; NOGUEIRA, M. A.
Afiliação: | DIOGO FERNANDO SATURNO, UEL; PAULA CEREZIN, UEL; PEDRO MOREIRA DA SILVA FILHO, CNPSO; ARNOLD BARBOSA DE OLIVEIRA, CNPSO; MARIA CRISTINA NEVES DE OLIVEIRA, CNPSO; MARIANGELA HUNGRIA DA CUNHA, CNPSO; MARCO ANTONIO NOGUEIRA, CNPSO.
Título: | Mineral nitrogen impairs the biological nitrogen fixation in soybean of determinate and indeterminate growth types.
Ano de publicação: | 2017
Fonte/Imprenta: | Journal of Plant Nutrition, v. 40, n. 12, p. 1690-1701, 2017.
ISSN: | 1532-4087
DOI: | http://dx.doi.org/10.1080/01904167.2017.1310890
Idioma: | Inglês
Conteúdo: | Soybean (Glycine max Merrill) crop production in Brazil relies mainly on biological nitrogen fixation (BNF) for nitrogen (N) supply. Recent adoption of indeterminate growth-type genotypes has raised doubts on the need for supplemental mineral N that might negatively affect the BNF. We assessed the effects of mineral N on BNF attributes of soybean genotypes grown in central and southern Brazil. Genotypes were inoculated with Bradyrhizobium sp. and/or received mineral N in three sets of experiments. In the first set, two genotypes received increasing rates of mineral N in nutrient solution, which consistently reduced the BNF. In the second set, mineral N applied at sowing and/or topdressing reduced nodulation and ureides-N in determinate and indeterminate growth-type genotypes. In the third set, mineral N applied at R5.3 stage, foliar or as topdressing, did not increase grain yield in four field experiments. Mineral N impaired BNF irrespective of the growth type and had on effect on grain yield.
Palavras-Chave: | Fixação biológica de nitrogênio.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (38073-1) - UPC - AP - DD -  -  -  - DIS