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Title: FREE-AIR CO2 ENRICHMENT OF SORGHUM: ENERGY BALANCE AND EVAPOTRANSPIRATION

Author
item Kimball, Bruce
item TRIGGS, J - UNIV OF ARIZONA
item Pinter Jr, Paul
item Wall, Gerard - Gary
item OTTMAN, M - UNIV OF ARIZONA
item LEAVITT, S - UNIV OF ARIZONA
item MATTHIAS, A - UNIV OF ARIZONA
item BROOKS, T - UNIV OF ARIZONA

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/23/2000
Publication Date: 11/15/2000
Citation: Kimball, B.A., Triggs, J.M., Pinter Jr, P.J., Wall, G.W., Ottman, M.J., Leavitt, S.W., Matthias, A.D., Brooks, T.J. 2000. Free-air co2 enrichment of sorghum: energy balance and evapotranspiration. Agronomy Abstracts. CD ROM !03-Kimball30125-P.

Interpretive Summary:

Technical Abstract: Field-grown grain sorghum [Sorghum bicolor (L.) Moench] was exposed to CO2 concentrations enriched to 200 umol/mol above ambient (ca. 370 umol/mol) using free-air CO2 enrichment (FACE) apparatus. Half of each main CO2 plot received ample water, while the other half received a deficit amount thereby exposing the plants to severe drought. Measurements were made of net radiation, canopy temperature, air temperature, soil heat flux, and wind speed. Energy balance components, including evapotranspiration were calculated from the data and comparisons made among the plots.