Foliar nitrogen dynamics in co-existing evergreen and deciduous species in oak forest
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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