Biological nitrogen fixation efficiency in brazilian common bean genotypes as measured by 15N methodology.
| dc.contributor | VINICIUS IDE FRANZINI, CPATU; CPATU; CENA/USP; CENA/USP; International Atomic Energy Agency. | |
| dc.creator | FRANZINI, V. I. | |
| dc.creator | MENDES, F. L. | |
| dc.creator | MURAOKA, T. | |
| dc.creator | TREVISAM, A. R. | |
| dc.creator | ADU-GYAMFI, J. J. | |
| dc.date | 2014-02-10T11:11:11Z | |
| dc.date | 2014-02-10T11:11:11Z | |
| dc.date | 2014-02-10 | |
| dc.date | 2013 | |
| dc.date | 2017-05-31T11:11:11Z | |
| dc.date.accessioned | 2026-06-30T23:37:34Z | |
| dc.description | 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. | |
| dc.format | p. 299-309. | |
| dc.identifier | In: OPTIMIZING productivity of food crop genotypes in low nutrient soils. Vienna: FAO: IAEA, 2013. | |
| dc.identifier | http://www.alice.cnptia.embrapa.br/alice/handle/doc/979298 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/386379 | |
| dc.language | eng | |
| dc.relation | (IAEA Tecdoc, 1721). | |
| dc.rights | openAccess | |
| dc.subject | Feijão | |
| dc.subject | Genótipo | |
| dc.subject | Nitrogênio | |
| dc.title | Biological nitrogen fixation efficiency in brazilian common bean genotypes as measured by 15N methodology. | |
| dc.type | Parte de livro |