Effects of ozone on the regrowth and energy reserves of a ladino clover-tall fescue pasture
A ladino clover and tall fescue pasture was established in September 1983 to determine the impact of ozone and available soil moisture on plants grown in open-top field chambers and exposed for 12 h daily to ozone (O{sub 3}) from April through October in 1984 and 1985. Samples were removed periodically to measure above- and below-ground biomass and energy reserves of the clover and fescue. At the final harvest, clover was the dominant species in below-ambient O{sub 3} while fescue was the dominant species at ambient and above-ambient O{sub 3} concentrations. Ladino clover shoot and root biomass was reduced by O{sub 3} for all harvest when compared to clover grown in the charcoal-filtered-air. Statistically-significant O{sub 3} effects were observed on clover shoots prior to roots. For most harvests, the energy reserves of ladino clover roots were suppressed by increasing O{sub 3} concentrations. Clover shoot starch levels were not greatly affected by O{sub 3} or moisture.
- Research Organization:
- North Carolina State Univ., Raleigh, NC (USA)
- OSTI ID:
- 7011747
- Report Number(s):
- PB-90-216359/XAB
- Resource Relation:
- Other Information: Pub. in Jnl. of Applied Ecology 25, 659-681(1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CLOVER
PLANT GROWTH
GRASS
OZONE
TOXICITY
AIR POLLUTION
INHIBITION
MOISTURE
ROOTS
SEASONAL VARIATIONS
TABLES
GROWTH
LEGUMINOSAE
LILIOPSIDA
MAGNOLIOPHYTA
MAGNOLIOPSIDA
PLANTS
POLLUTION
VARIATIONS
560300* - Chemicals Metabolism & Toxicology