Biomass production and nutrient responses of ponderosa pine to long-term elevated CO/sub 2/ concentrations

Conference · Sun Jun 01 04:00:00 EDT 1986

OSTI ID:5493779

Fried, J S; Surano, K A; Daley, P F; Shinn, J H; Anderson, P

Ponderosa pine saplings and seedlings were continuously exposed to elevated CO/sub 2/ concentrations of ambient, and ambient +75, +150, and +300 ppm in open-top chambers for 27 months. Saplings responded by reducing above ground biomass production. Although potassium concentration in both saplings and seedlings diminished as CO/sub 2/ concentration increased, no nutrients appeared to become limiting to growth as a result of elevated CO/sub 2/. Concentrations of Ca, Mg, and Zn in the saplings at different concentrations of CO/sub 2/ mirrored root densitites, indicating that an increase in root density at +150 ppm may account for greater nutrient concentrations observed in that tree. 17 refs., 6 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA); California Univ., Berkeley (USA). Dept. of Forestry and Resource Management
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5493779
• Report Number(s): UCRL-94281; CONF-8606147-2; ON: DE86014435
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METALS
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHRONIC EXPOSURE
CONIFERS
ELEMENTS
GREENHOUSE EFFECT
GROWTH
METALS
OXIDES
OXYGEN COMPOUNDS
PINES
PLANT GROWTH
PLANTS
POTASSIUM
SEEDLINGS
TREES