Data/hora: 31/05/2024 16:33:56

Biblioteca(s): 	Embrapa Amazônia Oriental.	
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