Nutrient translocation in the outer canopy and understory of an eastern deciduous forest

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · For. Sci.; (United States)

OSTI ID:5761285

Luxmoore, R J; Grizzard, T; Strand, R H

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/.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5761285
• Journal Information: For. Sci.; (United States), Journal Name: For. Sci.; (United States) Vol. 27:3; ISSN FOSCA
• Country of Publication: United States
• Language: English

Related Subjects

550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
ALKALI METALS
ALKALINE EARTH METALS
CALCIUM
COMPUTERIZED SIMULATION
DISSOLUTION
ELEMENTS
FORESTS
KINETICS
LEACHING
LEAVES
MAGNESIUM
METALS
NITROGEN
NONMETALS
PHOSPHORUS
PLANTS
POTASSIUM
PRODUCTIVITY
SEASONAL VARIATIONS
SEPARATION PROCESSES
SIMULATION
SODIUM
SPECIES DIVERSITY
STIMULATION
TRANSLOCATION
TREES
VARIATIONS