Foliar nitrogen dynamics in Liquidambar styraciflua saplings: response to nitrogen fertilization

摘要: The nitrogen (N) content of mature leaves and recently abscised representing different crown positions sweetgum (Liquidambar styraciflua L.) saplings was measured to (i) quantify the effects N fertilization on seasonal distribution foliar N, (ii) determine if availability affected relationship between leaf per unit area (NA) light exposure, (iii) project proportion incorporated into developing that could be supplied by reabsorbed from senescing during growing season. Fertilizer approximately doubled pool increased NA at all levels. generally base top tree acropetally along branch. Fertilization elevated for a given exposure level slope relationship. Litter season across plots. Fertilized trees more foliage than controls. Whereas falling ...