Internal cycling of nitrate in soils of a mature coniferous forest

Gross rates of N mineralization, immobilization, and nitrification were measured by ^1^5N isotope dilution in a 10-yr-old conifer plantation and in a mature conifer forest. Gross rates revealed nutrient cycling characteristics that differ from expectations based on more common measures of net rates....

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Veröffentlicht in:	Ecology (Durham) 1992-08, Vol.73 (4), p.1148-1156
Hauptverfasser:	Davidson, Eric A., Hart, Stephen C., Firestone, Mary K.
Format:	Artikel
Sprache:	eng
Schlagworte:	560300 > Chemicals Metabolism & Toxicology Animal and plant ecology Animal, plant and microbial ecology BIOLOGIA DEL SUELO Biological and medical sciences BIOLOGIE DU SOL BOSQUE DE CONIFERAS CALIFORNIA CALIFORNIE CHEMICAL REACTIONS CICLO BIOGEOQUIMICO CIENCIA DEL SUELO Coniferales CONIFEROUS FORESTS CONIFERS CYCLE BIOGEOCHIMIQUE CYCLING ECOLOGICAL CONCENTRATION Ecology ENVIRONMENTAL SCIENCES Forest ecology Forest ecosystems FOREST SOILS FORESTS FORET RESINEUSE Fundamental and applied biological sciences. Psychology Gases Grassland soils ISOTOPE APPLICATIONS ISOTOPE DILUTION ISOTOPE LABELING ISOTOPES LIGHT NUCLEI MICROBIAL ACTIVITIES MICROORGANISME MICROORGANISMOS MICROORGANISMS Mineral soils MINERALISATION MINERALIZACION MINERALIZATION NITRATE NITRATES NITRATOS NITRIFICACION NITRIFICATION NITROGEN 15 NITROGEN COMPOUNDS NITROGEN CYCLE NITROGEN ISOTOPES NUCLEI ODD-EVEN NUCLEI OXYGEN COMPOUNDS PINOPHYTA PLANTS RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT SCIENCES DU SOL SOIL BIOLOGY Soil ecology Soil microorganisms SOIL PROPERTIES SOIL SCIENCES SOILS SOL DE FORET STABLE ISOTOPES SUELO FORESTAL Synecology TECHNIQUE DES TRACEURS TECNICAS DE TRAZADORES Terrestrial ecosystems TRACER TECHNIQUES TRACER TECHNIQUES 540220 > Environment, Terrestrial-- Chemicals Monitoring & Transport-- (1990-) Trees
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Beschreibung
Zusammenfassung:	Gross rates of N mineralization, immobilization, and nitrification were measured by ^1^5N isotope dilution in a 10-yr-old conifer plantation and in a mature conifer forest. Gross rates revealed nutrient cycling characteristics that differ from expectations based on more common measures of net rates. Although net mineralization rates were somewhat higher in the young forest than in the old forest, gross mineralization rates in the old forest were 2-3 times as high as gross mineralization rates in the young forest, indicating more rapid turnover of inorganic-N pools in the old forest. Net mineralization rates were
ISSN:	0012-9658 1939-9170
DOI:	10.2307/1940665