Data/hora: 07/06/2024 08:39:20

Biblioteca(s): | Embrapa Amazônia Oriental.
Tipo da produção científica: | Capítulo em Livro Técnico-Científico
Data corrente: | 10/02/2014
Data da última atualização: | 19/10/2022
Autoria: | FRANZINI, V. I.; MENDES, F. L.; MURAOKA, T.; TREVISAM, A. R.; ADU-GYAMFI, J. J.
Afiliação: | VINICIUS IDE FRANZINI, CPATU; CPATU; CENA/USP; CENA/USP; International Atomic Energy Agency.
Título: | Biological nitrogen fixation efficiency in brazilian common bean genotypes as measured by 15N methodology.
Ano de publicação: | 2013
Fonte/Imprenta: | In: OPTIMIZING productivity of food crop genotypes in low nutrient soils. Vienna: FAO: IAEA, 2013.
Páginas: | p. 299-309.
Série: | (IAEA Tecdoc, 1721).
Idioma: | Inglês
Conteúdo: | Common bean (Phaseolus vulgaris L.) represents the main source of protein for the Brazilian and other Latin-American populations. Unlike soybean, which is very efficient in fixing atmospheric N2 symbiotically, common bean does not dispense with the need for N fertilizer application, as the biologically fixed N (BNF) seems incapable to supplement the total N required by the crop. A experiment under controlled conditions was conducted in Piracicaba, Brazil, to assess N2 fixation of 25 genotypes of common bean (Phaseolus vulgaris L.). BNF was measured by 15N isotope dilution using a non-N2 fixing bean genotype as a reference crop. The common bean genotypes were grown in low (2.2 mg N kg-1 soil) or high N content soil (200 mg N kg-1 soil), through N fertilizer application, as urea-15N (31.20 and 1.4 atom % 15N, respectively). The bean seeds were inoculated with Rhizobium tropici CIAT 899 strain and the plants were harvested at grain maturity stage. The contribution of BNF was on average 75% of total plant N content, and there were differences in N fixing capacity among the bean genotypes. The most efficient genotypes were Horizonte, Roxo 90, Grafite, Aporé and Vereda, when grown in high N soil. None of the genotypes grown in low N soil was efficient in producing grains compared to those grown in high N soil, and therefore the BNF was not able to supply the total N demand of the bean crop.
Thesagro: | Feijão; Genótipo; Nitrogênio.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/96865/1/p299.pdf
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (49198-1) - UPC - PL - DD -  -  -  - DIS