Acta Botánica Venezuelica
versión impresa ISSN 0084-5906
Resumen
GORDON, Elizabeth y FEO, Yasmira. Nitrogen dynamics in an herbaceous wetland (Miranda state, Venezuela) dominated by Hymenachne amplexicaulis. Acta Bot. Venez. [online]. 2009, vol.32, n.2, pp.311-332. ISSN 0084-5906.
The effect of seasonal changes in water depth in an herbaceous, permanently waterlogged wetland on the nitrogen concentration of Hymenachne amplexicaulis is reported (Miranda State, Venezuela). The soils nitrogen concentration increased from February to December. Nitrogen mean concentration was higher on dead aboveground biomass, followed by leaves, inflorescences and stems. Total nitrogen was lower on December and higher on August. Net absorption and N-use efficiency of leaves and stems showed different behaviors study period. Seasonal changes of water depth influenced concentration, absorption and nitrogen-use efficiency by the grass H. amplexicaulis.
Palabras clave : Hymenachne amplexicaulis; nitrogen; Venezuela; wetlands.