Data/hora: 07/06/2024 08:06:04

Biblioteca(s): 	Embrapa Pecuária Sudeste.	
Data corrente: 	04/12/2008	
Data da última atualização: 	30/08/2013	
Autoria: 	MOREIRA, A.; TEXEIRA, W. G.; MARTINS, G. C.	
Afiliação: 	Adônis Moreira, CPPSE; Wenceslau G. Teixeira, CPAA; Gilvan Coimbra Martins, CPAA.	
Título: 	Extractants and availability of micronutrients in Central Amazonian Dark Earth soil.	
Ano de publicação: 	2008	
Fonte/Imprenta: 	In: INTERNATIONAL CONFERENCE ON BIOCHAR INITIATIVE, 2., 2008, Newcastle. Abstract... Newcastle: Newcastle upon Tyne, 2008. v.1. p.1.	
Idioma: 	Inglês	
Conteúdo: 	Amazonian Dark Earths (ADE) are di:[ferentiated from surrounding soils by their darker colour, bigher pH, organic matter, P, Ca and Mg, but does not studies about micronutrients available. The objective of this work was to compare extractants solutions (Mehlich I and DTPA-TEA) evaluating the availability of Cu, Fe, Mn and Zn in ADE soils with higher fertility occurring inscattered patches throughout the Amazonian called Terra Preta do Índio (TPI). Three replicates of sixteen samples of different depths were taken from ten archeology sites, and tive representatives soils classes of the region (Oxisol, Inceptsol, ultisol, Entisol and Spodsol) were used. The DTP A- TEA solution extracted more Cu and Fe available, while Meh1ich 1 solution extracted more Mn and Zn available. In the edaphoclimatic conditions studies the mehlich 1 extractant showed better sensibility than DTP A- TEA extractants. The best coefficients between extractants were observed with: Cu (DTPA-TEA), Fe (Meh1ich 1 and DTPA-TEA), Mn and Zn (Mehlich 1). The use of ranges higher, middle and lower originary in others regions can lead to incorrect interpretation of diagnoses on availability ofthe micronutrients in ADE soils (Table 1).	
Palavras-Chave: 	Dark earth; Extractants; Micronutrients: Amazonian.	
Thesaurus Nal: 	soil.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pecuária Sudeste (CPPSE)	
Exemplares: 	CPPSE - (18096-1) - UPC - RA - -- - PROCI-2008.00160 - MOR - 2008.00160 - DIS