Data/hora: 23/09/2024 21:50:33

Biblioteca(s): 	Embrapa Arroz e Feijão; Embrapa Meio-Norte.	
Data corrente: 	12/04/2007	
Data da última atualização: 	06/02/2023	
Autoria: 	LEITE, L. F. C.; MENDONÇA, E. S.; MACHADO, P. L. O. de A.	
Afiliação: 	LUIZ FERNANDO CARVALHO LEITE, CPAMN; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPAF.	
Título: 	Influence of organic and mineral fertilisation on organic matter fractions of a Brazilian Acrisol under maize/common bean intercrop.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Australian Journal of Soil Research, Austrália, v. 45, n. 1, p. 25-32, 2007.	
ISSN: 	0004-9573	
Idioma: 	Inglês	
Conteúdo: 	In 1984, a field experiment was initiated in Coimbra, State of Minas Gerais, Brazil, involving the combination of 3 levels of mineral fertilisers at control (0); 10 kg N/ha, 15 kg P/ha, and 17 kg K/ha (MF1); 20 kg N/ha, 30 kg P/ ha, and 34 kg K/ha (MF2); and 2 levels of organic compost at control ( 0) and 40 m(3)/ha (OC) in a maize/common bean intercrop. Soil samples were collected (0-0.10 and 0.10-0.20 m) in 2000 to evaluate the impact of mineral and organic compost on total carbon (TOC) and nitrogen (TN) stocks and on organic carbon pools of a Ferric Acrisol (Chromosol in the Australian Soil Classi. cation). Additional soil samples were collected from an adjacent site covered by secondary Atlantic Forest as a reference. The conversion of forest to agriculture caused a reduction in most of TOC, TN, and microbial biomass carbon, free-light fraction carbon (C-LF), and non-labile carbon. The carbon pools in cultivated plot were enhanced by the addition of compost alone. At both depths, TOC and TN stocks were higher (P < 0.05) in the MF2+ OC than MF2 treatment. Compared to soils that have received mineral fertiliser alone or combined with compost, the stocks of labile organic carbon, TN, and CLF were significantly affected (P < 0.05) by the sole application of compost.	
Palavras-Chave: 	Carbon index; Ecossistema tropical; Labile organic carbon; Light fraction carbon; Tropical ecosystems.	
Thesagro: 	Nitrogênio; Plantio Direto; Solo.	
Thesaurus Nal: 	cropping systems; humic substances; microbial biomass.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra
X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Meio-Norte (CPAMN)	
Exemplares: 	CPAMN - (21529-1) - UPC - AP - PP - 11/08 -  - 2008.00011 - DIS
CNPAF - (24799-1) - UPC - AP - DD - 2007 -  - 2007 - DIS