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	Provedor de dados Gayana Botánica (2) Autor Boeckx,Pascal (2) Cleemput,Oswald van (2) Vervaet,Hilde (1) Palavra-chave Acidification (1) Cycling (1) Drinking water (1) Emission (1) Eutrophication (1) Forest soil (1) Greenhouse effect (1) Nitric oxide (1) Nitrogen (1) Nitrogen loss (1) Nitrous oxide (1) Ozone (1) Mais... Tipo do documento Journal article (2) Ano 2005 (2) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION Gayana Botánica Boeckx,Pascal; Vervaet,Hilde; Cleemput,Oswald van. Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or combustion (e.g. NOx from traffic). However, knowledge about N2O and NO exchange between forests and the atmosphere is scarce. The aim of this study was to determine N2O and NO emission rates from a deciduous forest in Belgium, receiving a high N-deposition (ca. 40 kg N ha-1 yr-1). In April 2000, the NO emission from the forested location was 17.3 (± 1.2) and 17.05 (± 0.7) ng NO-N m-2 s-1, respectively, for the soil including the organic layer and the mineral... Tipo: Journal article Palavras-chave: Emission; Forest soil; Nitrogen; Cycling; Nitric oxide; Nitrous oxide. Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003 ALTERATION OF NITROGEN CYCLING BY AGRICULTURAL ACTIVITIES, AND ITS ENVIRONMENTAL AND HEALTH CONSEQUENCES Gayana Botánica Cleemput,Oswald van; Boeckx,Pascal. The food demands of the increasing world population puts pressure on land use and N availability. In this paper an overview is given of the different N cycling processes affected by agricultural activities. Of the amount of N added to the soil, about half is removed from the field as harvested crop, while the remainder of the N is incorporated into soil organic matter or is lost to other parts of the environment. During the last decades there has been much research on environmental consequences of agricultural activities, mainly on emission of gaseous N compounds (NH3, NO, N2O and N2), but also on N leaching, runoff and erosion. Study of the factors controlling loss of N is complex because of their multiplicity and mutual interactions. More recently... Tipo: Journal article Palavras-chave: Acidification; Drinking water; Eutrophication; Greenhouse effect; Nitrogen loss; Ozone. Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200005 Registros recuperados: 2 Primeira ... 1 ... Última

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