Accession and cycling of elements in a coastal stand ofPinus radiata D. Don in New Zealand |
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Authors: | T. G. Baker P. D. Hodgkiss G. R. Oliver |
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Affiliation: | (1) Forest Research Insitute, New Zealand Forest Service, Private Bag, Rotorua, New Zealand;(2) Present address: School of Botany, University of Melbourne, 3052 Parkville, Victoria, Australia |
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Abstract: | Summary The accession and cycling of elements in a 14-year-old coastal stand ofPinus radiata D. Don was measured for one year. The element contents (mg m–2 year–1) of bulk precipitation and throughfall respectively were: NO3–N 41, 12; NH4–N 133, 154; organic-N 157, 396; Na 4420, 9700; K 387, 2900; Ca 351, 701; Mg 486, 1320. Of the increase in element content of rainwater beneath the forest canopy 20% (NH4–N), 70% (organic-N), 3% (Na), 90% (K), 20% (Ca) and 30% (Mg) was attributed to leaching; the remainder to washing of aerosols filtered from the atmosphere by the vegetation. The canopy absorbed approximately 40 mg m–2 year–1 of NO3–N. Litterfall was the major pathway for the above-ground biogeochemical cycle of N (93%), Ca (96%) and Mg (74%), and leaching was the major (73%) pathway for K. |
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Keywords: | Aerosols Bulk precipitation Coastal Cycling Elements Filtering Leaching Literfall Nutrients Pinus radiata Throughfall |
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