Data/hora: 20/06/2024 20:21:08

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