Foliar nitrogen dynamics in co-existing evergreen and deciduous species in oak forest
Abstract
Changes in foliar nitrogen was observed monthly in an Oak forest where evergreen and deciduous species were existing, together in pairs, at a distance of one and half meter. Nitrogen concentration during bud-break was significantly higher (PO.05) for deciduous species compared to evergreen species (7.3% for deciduous and 6.4% for evergreen). Nitrogen concentration at senesced stage was significantly higher for evergreen species, compared to deciduous species (2.6% vs 1.8%). However, at mature stage this difference was significant only for overstory tree pair. Retranslocation of nitrogen mass at senesced leaf stage was higher in deciduous species than evergreen species (61.9% vs. 20.8%) indicating that inspite of extracting nutrients from the same microsite both the types of species have different nutrient conserving strategy.
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