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Effects of fire on soil nitrogen dynamics and microbial biomass in savannas of Central Brazil. Repositório Alice
NARDOTO, G.B.; BUSTAMANTE, M.M. da C..
The objective of this work was to study the effects of fire on net N mineralization and soil microbial biomass in burned and unburned cerrado stricto sensu sites. The study was carried out from April 1998 to April 2000. The pH values were significantly higher in the burned site while soil moisture content was significantly higher in the unburned site (P<0.05). The soil C/N ratio was 22/1 and the available NO3-N ranged between 1.5 and 2.8 mg kg-1 dry weight. However, the NH4-N concentration ranged between 3 and 34 mg kg-1 dry weight in the burned site and between 3 and 22 mg kg-1 dry weight in the unburned site. The NH4-N increased after fire, but no significant changes were observed for NO3-N (P<0.05). The NO3-N accumulation occurred in short periods...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Nitrogen mineralization; Nitrification; Inorganic compounds; Burning; Mineralização do nitrogênio; Nitrificação; Composto inorgânico; Queimada.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/109187
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