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	Provedor de dados Chilean J. Agric. Res. (1) PAB (1) RChHN (1) Autor BOERNER,R.E.J (1) Bustamante,Mercedes Maria da Cunha (1) DECKER,KELLY L.M (1) Hirzel,Juan (1) Nardoto,Gabriela Bielefeld (1) Undurraga,Pablo (1) Walter,Ingrid (1) Mais... Palavra-chave Nitrogen mineralization (3) Nitrification (2) Aerobic incubation (1) Burning (1) Chilean Andes (1) Inorganic compounds (1) Leaf lifespan (1) Nutrient availability (1) Poultry litter (1) Soil carbon (1) Volcanic soil (1) Mais... Tipo do documento Journal article (2) Info:eu-repo/semantics/article (1) Ano 2010 (1) 2003 (2) País Chile (2) Brazil (1) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Effects of fire on soil nitrogen dynamics and microbial biomass in savannas of Central Brazil PAB Nardoto,Gabriela Bielefeld; Bustamante,Mercedes Maria da Cunha. 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: Info:eu-repo/semantics/article Palavras-chave: Nitrogen mineralization; Nitrification; Inorganic compounds; Burning. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000800008 Elevation and vegetation influences on soil properties in Chilean Nothofagus forests RChHN DECKER,KELLY L.M; BOERNER,R.E.J. We measured net nitrogen mineralization, net nitrification, proportional nitrification, and total inorganic nitrogen, available phosphorus, and soil organic carbon in five Andean forested stands in an attempt to resolve the relative influence of elevation and forest canopy composition on soil organic matter and nutrient dynamics in this ecosystem type. Our five forested study sites were within a contiguous Nothofagus forest that ranged from 1,280 to 1,700 m elevation in the central Chilean Andes. The five sites consisted of three single species stands, one each of the low elevation deciduous N. obliqua, the evergreen N. dombeyi, or the high elevation deciduous N. pumilio, as well as two mixed evergreen-deciduous stands. There was no statistically... Tipo: Journal article Palavras-chave: Chilean Andes; Leaf lifespan; Nitrogen mineralization; Nitrification; Soil carbon. Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300003 Nitrogen Mineralization and Released Nutrients in a Volcanic Soil Amended with Poultry Litter Chilean J. Agric. Res. Hirzel,Juan; Undurraga,Pablo; Walter,Ingrid. Optimum application rates of poultry litter (PL) spread out on the farmer´s field is a valuable source of available plant nutrients. The aim of this study was to compare the effect of two rates of PL and conventional fertilization (CF) on N mineralization and P, K, Zn, and Cu availability in an Andisol from Southern Chile under controlled conditions. Aerobic incubation was carried out for a 16-wk period. N mineralization rates were higher (61.5%) with the two PL treatments than with conventional fertilizer (23%). CF was associated with high N availability prior to the start of incubation and slight immobilization during the first week, perhaps due to a more rapid conversion of urea into NH4 which was then temporarily immobilized by the microbial biomass.... Tipo: Journal article Palavras-chave: Aerobic incubation; Poultry litter; Nitrogen mineralization; Nutrient availability; Volcanic soil. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100012 Registros recuperados: 3 Primeira ... 1 ... Última

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