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Title Nutrient translocation in the outer canopy and understory of an eastern deciduous forest
Creator/Author Luxmoore, R.J. ; Grizzard, T. ; Strand, R.H.
Publication Date1981 Sep 01
OSTI IdentifierOSTI ID: 5761285
DOE Contract NumberW-7405-ENG-26
Other Number(s)CODEN: FOSCA
Resource TypeJournal Article
Resource RelationFor. Sci. ; Vol/Issue: 27:3
Research OrgOak Ridge National Lab., TN
Subject550500 -- Metabolism; ;CALCIUM-- TRANSLOCATION;MAGNESIUM-- TRANSLOCATION;NITROGEN-- TRANSLOCATION;PHOSPHORUS-- TRANSLOCATION;POTASSIUM-- TRANSLOCATION;SODIUM-- TRANSLOCATION;TRANSLOCATION-- SEASONAL VARIATIONS; COMPUTERIZED SIMULATION;FORESTS;KINETICS;LEACHING;LEAVES;PRODUCTIVITY;SPECIES DIVERSITY;STIMULATION;TREES
Related SubjectALKALI METALS;ALKALINE EARTH METALS;DISSOLUTION;ELEMENTS;METALS;NONMETALS;PLANTS;SEPARATION PROCESSES;SIMULATION;VARIATIONS
Description/Abstract The translocation of nutrients into and out of outer canopy leaves of ten eastern deciduous forest species was calculated from the temporal patterns of foliar nutrient pools sampled through a growing season.^The calculations accounted for average chemical leaching effects due to rainfall.^There were no significant differences in translocation rate between species within the evergreen, understory, or overstory-deciduous tree groups.^Evergreen species had lower translocation rates than deciduous trees.^Translocation rates into leaves of deciduous species showed a very rapid increase during spring; however, by late May, foliar phosphorus was being translocated at a slow rate back to stems.^ A similar trend was established for nitrogen by mid-June.^An internal storage pool is suggested as the major source of foliar nitrogen during the spring flush since a simulation of nitrogen uptake from soil could only account for one-fourth of the quantity of nitrogen transported to leaves by the end of May.^Simulation further showed that trace levels of soluble nitrogen (0.01 ppm) in soil were sufficient to supply a deciduous forest with an estimated nitrogen uptake of 100 kg N ha/sup -1/ year/sup -1/.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 505-518
System Entry Date2001 May 13

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