Data/hora: 03/06/2024 14:23:42

Biblioteca(s): 	Embrapa Agrobiologia.	
Data corrente: 	18/09/1996	
Data da última atualização: 	18/09/1996	
Autoria: 	VLASSAK, K.; VANDERLEYDEN, J.; FRANCO, A. A.	
Título: 	Competition and persistence of Rhizobium tropici and Rhizobium etli in tropical soil during successive bean (Phaseolus vulgaris L.) cultures.	
Ano de publicação: 	1996	
Fonte/Imprenta: 	Biology and Fertility of Soils, Berlin, v. 21, n. 1-2, p. 61-68, 1996.	
Idioma: 	Inglês	
Conteúdo: 	Strains of Rhizobium tropici IIB, CIAT899 and F98.5, both showing good N2 fixation, and a R. etli strain W16.3SB wre introduced into a field which had no history of bean culture. Plant dilution estimates showed that in the presence of its host (Phaseolus vulgaris cv. Carioca) during the cropping seasons and the subsequent fallow summer periods, the bean rhizobial populations increased from less than 30 to 10 elevado a tres g-1 dry soil after 1 year and to 10 elevado a quatro g-1 dry soil after 2 years. In the 1st year crop, the inoculated strains occupied most of the nodules, which resulted in a higher nodulation and C2H2 reduction activity. Without reinoculation for the second and third crops, however, little R. tropici IIB was recovered from the nodules and the bean population consisted mainly of R. etli, R. leguminosarum bv. phaseoli, and R. tropici IIA. Reinoculation with our superior R. tropici IIB occupying the main part of the nodules and a possible effect on nodulation and C2H2 reduction activity, but reintroduction of the inoculant strain in the third season did not have any effect.	
Palavras-Chave: 	Bean; BNF; FBN; Fixacao biologica de nitrogênio; Nitrogen fixing bacteria; Seed.	
Thesagro: 	Feijão; Inoculação; Phaseolus Vulgaris; Semente.	
Thesaurus Nal: 	inoculation methods; Rhizobium etli; Rhizobium tropici.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Agrobiologia (CNPAB)	
Exemplares: 	CNPAB - (24301-1) - UPC - AP - -- -  -  - 22150 - DIS