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Showing 1 to 4 of 4 for “"15N stable isotope"”.
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The role of denitrification in the nitrogen cycle of New England salt marshes
… measurements of nitrogen gas (N2) fluxes and a 15N stable isotope tracer to determine the contribution of denitrification to salt marsh sediment N cycling. Denitrification in salt marsh tidal creekbottoms is a major sink for groundwater nitrate of terrestrial origin. I studied creekbottom …
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The Contribution of Spawning Pacific-salmon to Nitrogen Fertility and Vegetation Nutrition during Riparian Primary Succession on an Expansive Floodplain of a Large River
… and after salmon runs. Natural abundance of 15N was used as a tracer of salmon-N. </p> <p>We found that new alluvial deposits were N-poor, containing < 200 kg-N ha-1 (to 10cm). However, soil-N increased more than 10X within 30 years and soils were N-rich henceforth. Net N-mineralization on …
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The Contribution of Spawning Pacific-salmon to Nitrogen Fertility and Vegetation Nutrition during Riparian Primary Succession on an Expansive Floodplain of a Large River
… and after salmon runs. Natural abundance of 15N was used as a tracer of salmon-N. </p> <p>We found that new alluvial deposits were N-poor, containing < 200 kg-N ha-1 (to 10cm). However, soil-N increased more than 10X within 30 years and soils were N-rich henceforth. Net N-mineralization on …
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Nitrogen release, tree uptake, and ecosystem retention in a mid-rotation loblolly pine plantation following fertilization with 15N-enriched enhanced efficiency fertilizers
Nitrogen is the most frequently limiting nutrient in southern pine plantations. Previous studies found that only 10 to 25% of applied urea fertilizer N is taken up by trees. Enhanced efficiency fertilizers could increase tree uptake efficiency by controlling the release of N and/or stabilize N. …