Growth, radiation use efficiency, and canopy reflectance of wheat and corn grown under elevated ozone and carbon dioxide atmospheres

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Remote Sensing of Environment

DOI:https://doi.org/10.1016/0034-4257(95)00208-1· OSTI ID:227854

Rudorff, B F.T. ^[1]; Mulchi, C L ^[2]; Daughtry, C S.T.; Lee, E H ^[3]

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1. National Inst. for Space Research, Sao Jose dos Campos (Brazil). Div. of Remote Sensing
2. Univ. of Maryland, College Park, MD (United States). Dept. of Agronomy
3. Agricultural Research Service, Beltsville, MD (United States). Climate Stress Lab.

Estimates of increases in future agricultural production in response to increases in carbon dioxide (CO{sub 2}) concentrations in the atmosphere are often based on the beneficial physiological effect of CO{sub 2} enrichment on plant growth, especially in C{sub 3} plants. However, these estimates fail to consider the negative impact of ozone (O{sub 3}) air pollution on crop production. Increases in tropospheric concentrations of both gases, CO{sub 2} and O{sub 3}, have been observed over the past century, and both are predicted to continue to increase at even higher rates in the near future to levels when they may have a significant impact on agricultural production. Field studies with wheat (Triticum aestivum L.) in 1991 and 1992, and corn (Zea mays L.) in 1991 were conducted using open-top chambers to mimic atmospheric concentrations of CO{sub 2} ({approximately} 500 {micro}L{sup {minus}1} CO{sub 2}) and O{sub 3} ({approximately} 40 nL L{sup {minus}1} O{sub 3} above ambient air [O{sub 3}] during 7 h day{sup {minus}1}, 5 days week{sup {minus}1}) that are predicted to occur at the Earth`s surface during the first half of the 21st century. Wheat and corn (C{sub 3} vs. C{sub 4}) produced clearly different responses to CO{sub 2} enrichment, but similar responses to O{sub 3} exposure. In what, O{sub 3} exposure led to reduced grain yield, biomass, and radiation use efficiency (RUE, phytomass production per unit of energy received); in both years; but reduction in accumulated absorbed photosynthetically active radiation (AAPAR) was observed only in 1991. Conversely, CO{sub 2} enrichment produced greater grain yield, dry biomass, and RUE.

• OSTI ID: 227854
• Journal Information: Remote Sensing of Environment, Journal Name: Remote Sensing of Environment Journal Issue: 2 Vol. 55; ISSN RSEEA7; ISSN 0034-4257
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
AIR POLLUTION
BIOLOGICAL EFFECTS
CANOPIES
CARBON DIOXIDE
ECOLOGICAL CONCENTRATION
EXPOSURE CHAMBERS
INHIBITION
MAIZE
OZONE
PRODUCTIVITY
REMOTE SENSING
SOLAR RADIATION
TOXICITY
WHEAT