Effects of open-top chambers on Valencia' orange trees. [Citrus sinensis]

Journal Article · · Journal of Environmental Quality; (United States)

OSTI ID:5387989

Olszyk, D M ^[1]; Takemoto, B K ^[2]; Kats, G; Dawson, P J; Morrison, C L; Preston, J W; Thompson, C R ^[3]

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1. Environmental Protection Agency, Corvallis, OR (United States)
2. California Air Resources Board, Sacramento (United States)
3. Univ. of California, Riverside (United States)

Open-top field chambers are the most widely used technology for evaluating the impacts of air pollutants on vegetation. This study was conducted to evaluate the long-term effects of chambers on Valencia orange trees (Citrus sinensis (L.) Osbeck). The trees were exposed to ambient ozone (O{sub 3}) for 51 months in large (4.3-m diam. by 2.9-m high) nonfiltered open-top chambers (NF) and in ambient air without chambers (AA). Results suggest that the yield increases for NF compared to AA trees could, in part, be accounted for by decreased flux of O{sub 3} into leaves (based on decreased O{sub 3} exposure and leaf conductance). However, other factors, i.e., increased tree growth, altered leaf C allocation, and lack of wind stress occurring only in chambers, likely contributed to higher NF tree yields.

• OSTI ID: 5387989
• Journal Information: Journal of Environmental Quality; (United States), Vol. 21:1; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
EXPOSURE CHAMBERS
EVALUATION
FRUIT TREES
PLANT GROWTH
OZONE
BIOLOGICAL EFFECTS
WIND
GROWTH
PLANTS
TREES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology