Data/hora: 28/05/2024 05:13:56

Biblioteca(s): 	Embrapa Amazônia Ocidental.	
Data corrente: 	31/10/2007	
Data da última atualização: 	11/01/2008	
Autoria: 	DÜNISCH, O.; LIMA, V. C.; SEEHANN, G.; DONATH, J.; MONTÓIA, V. R.; SCHWARZ, T.	
Afiliação: 	Institute for Wood Biology and Wood Protection; Universidade Federal do Paraná; Otto Henneberg; Bolsista-CPAA.	
Título: 	Retention properties of wood residues and their potential for soil amelioration.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Wood Science and Technology, v. 41, n. 2, p. 169-189, fev. 2007.	
Idioma: 	Inglês	
Conteúdo: 	The particle size distribution, the nutrient content and the sorption behaviour of six solid wood and ash/charcoal residues collected in three wood-processing companies in Germany and Brazil were investigated in order to elucidate the potential of these residues for the development of new products for soil amelioration. The absorption of N, P, and K by the residues and the leaching of nutrients from impregnated samples were studied in the laboratory at substrate temperatures of 20 and 300°C. The release of elements by the impregnated samples and the sorption behaviour of ash/charcoal incorporated in the soil were also studied in the field on a temperate site (Hamburg, 53°32'N 09°59'E), on a subtropical site (Ivaí, 25°15'S 50°45'W), and on a tropical site (Aripuanã, 10°09'S 59°26'W). Under laboratory conditions the solid wood residues absorbed 2.0?9.1% of the N, 0.1?0.4% of the P, and 1.0?8.5% of the K available in the impregnation solution. At a temperature of 20°C, selected sieve fractions of the ash/charcoal residues absorbed up to twice as much as N and up to 100 times more K than the treated wood residues. The absorption of N, P, and K to the ash/charcoal residues increased significantly at a substrate temperature of 300°C compared to a substrate temperature of 20°C. In absolute numbers, the leaching of N, P, and K from the impregnated ash/charcoal residues was in the range of the release by the impregnated solid wood residues, whilst the relative rate of nutrient leaching was strongly reduced. The field experiments confirmed the results obtained in the laboratory and indicated that ash/charcoal residues are suitable raw materials for the development of new products for soil amelioration, in particular for application under humid climate conditions.	
Palavras-Chave: 	Alemanha; Brasil; Resíduo de madeira; Retenção.	
Thesagro: 	Solo.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Amazônia Ocidental (CPAA)	
Exemplares: 	CPAA - (18152-1) - ADD - SP - -- - S8508 -  - S8508 - DIS