Data/hora: 23/09/2024 15:51:12

Biblioteca(s): 	Embrapa Agrobiologia.	
Data corrente: 	13/01/1999	
Data da última atualização: 	13/01/1999	
Autoria: 	IBIJBIJEN, J.; URQUIAGA, S.; ISMAILI, M.; ALVES, B. J. R.; BODDEY, R. M.	
Título: 	Effect of arbuscular mycorrhizas on uptake of nitrogen by Brachiaria arrecta and Sorghum vulgare from soils labelled for several years with 15N.	
Ano de publicação: 	1996	
Fonte/Imprenta: 	New Phytologist, Cambridge, v. 133, p. 487-494, 1996.	
Idioma: 	Inglês	
Conteúdo: 	A pot experiment was conducted under glasshouse conditions to investigate the effect of the inoculation of arbuscular mycorrhizal (AM) fungi on the growth and N uptake of two graminaceous plants: Brachiaria arrecta (Hack. ex. Th. Dur & Schinz) Stent and Sorghum vulgare (Pers.) growing in four fumigated soils which had been labelled for several years with 15N. The four soils had different chemical characteristics, especially in their P availability. The levels of root colonization by AM fungi were inversely related to the P concentration in these soils. Positive responses to AM fungal inoculation were observed for all the yield parameters except in the soil with the highest P availability (40 ug P g-1 soil, extractant Mehlich-1). In the other three soils, AM fungal inoculation of both crops increased N accumulation by between 17 and 46%, but the 15N enrichment of the N absorbed was significantly lower in the mycorrhizal plants than in those not colonized by mycorrhizal fungi. This suggests that some of the N absorbed from the soil by the mycorrhizal roots was derived from N sources other than the mineral N.  	
Palavras-Chave: 	Brachiaria arrecta; VAM.	
Thesagro: 	Absorção; Micorriza; Nutriente; Sorghum Vulgare.	
Thesaurus Nal: 	nutrient uptake; vesicular arbuscular mycorrhizae.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Agrobiologia (CNPAB)	
Exemplares: 	CNPAB - (24362-1) - UPC - AP - -- -  -  - 22203 - DIS