Data/hora: 11/06/2024 17:00:19

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	03/09/2007	
Data da última atualização: 	13/02/2015	
Autoria: 	ORTIZ-CEBALLOS, A. I.; PEÑA-CABRIALES, J. J.; FRAGOSO, C.; BROWN, G. G.	
Afiliação: 	Angel I. Ortiz-Ceballos, Universidad Veracruzana - Laboratorio de Biotecnología y Ecología Aplicada; Juan J. Peña-Cabriales, CINVESTAV - Departamento de Biotecnología y Bioquímica; Carlos Fragoso, Instituto de Ecologia - Departamento de Biologia de Suelos; George G. Brown, Embrapa Florestas.	
Título: 	Mycorrhizal colonization and nitrogen uptake by maize: combined effect of tropical earthworms and velvetbean mulch.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Biology and Fertility of Soils, v. 44, p. 181-186, Oct. 2007.	
DOI: 	10.1007/s00374-007-0193-y	
Idioma: 	Inglês	
Notas: 	Publicado online.	
Conteúdo: 	Earthworms and mulch can have positive or negative effects on mycorrhizae (fungus-roots) and N uptake by plants. In the present experiment, maize plants were grown under greenhouse conditions with or without tropical earthworms (Balanteodrilus pearsei) and mulch of velvetbean (Mucuna pruriens var. utilis). The formation of vesicles and hyphae of arbuscular-mycorrhizal (AM) fungi in roots and N uptake by maize plants was measured at harvest. The addition of earthworms and velvetbean reduced AM root colonization. Earthworms had no effect on plant root or shoot biomass. In the absence of velvetbean, earthworms reduced AM colonization, but when velvetbean was present, this effect disappeared. The addition of velvetbean mulch, on the other hand, had an effect on plant biomass (above- and belowground) and a positive effect on AM fungal colonization of roots in presence of worms, but a negative effect when worms were absent. When both M. pruriens and B. pearsei were added, shoot and root biomass and N concentrations increased. Vesicle formation was related to velvetbean mulch decomposition as well as the higher N concentration in maize roots. Management of mulch–earthworm interactions may be of value, particularly in low-input and organic agricultural systems, and deserves further investigation.	
Thesagro: 	Micorriza; Minhoca; Nitrogênio.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (41665-1) - UPC - AP - DD -  -  -  - DIS