Effects of acid rain on plant microbial associations in California. Research report (final)

Technical Report · Fri Apr 13 04:00:00 EST 1984

OSTI ID:6238188

Harris, D; Paul, E A

The effects of simulated acid rain of pH 5.6 to 3.0, with ionic composition similar to that found in California, on Trifolium repens, Lupinus densiflorus and L. benthamii grown in two soils were tested. The interactions of treatment intensity, soil type, phosphorus uptake and mycorrhizal influences on growth, carbon fixation and allocation and nitrogen fixation were determined. Acidic treatments generally decreased plant growth, nodulation and nitrogenase activity. The exposure of plants to a large number of simulated rainfall conditions of shorter duration did not result in the negative growth effects. Plants adequately supplied with P, either as fertilizer or by mycorrhizal fungi, were much more resistant to conditions caused by acidic precipitation and in some cases growth increases were found.

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 6238188
• Report Number(s): PB-84-242122
• 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.
ACID RAIN
AIR POLLUTION
ATMOSPHERIC PRECIPITATIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
CARBON 14
CARBON DIOXIDE FIXATION
CARBON ISOTOPES
ELEMENTS
ENZYME ACTIVITY
EVEN-EVEN NUCLEI
FERTILIZERS
FUNGI
GROWTH
HERBS
ISOTOPES
LIGHT NUCLEI
MYCORRHIZAS
NITROGEN FIXATION
NONMETALS
NUCLEI
PHOSPHORUS
PLANT GROWTH
PLANTS
POLLUTION
RADIOISOTOPES
RAIN
RESPIRATION
SOILS
YEARS LIVING RADIOISOTOPES