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- W2075123064 abstract "Environmental effects on the CO2 flux (Fc) and CO2—water flux ratio (CWFR) of alfalfa (Medicago sativa L.) were studied using micrometeorological techniques. The study was conducted in the east central Great Plains of North America. Fc was dependent on solar radiation, turbulent mixing and air temperature. The response of Fc to increasing irradiance was described by a diminishing returns curve. Increasing turbulent mixing caused a reduction in the boundary-layer resistance to CO2 transfer and increased light penetration into the canopy; both factors caused Fc to increase. Under high irradiance, Fc decreased with increasing air temperature in the range 23–32°C. This effect was due to both soil plus root and dark respiration increasing with air temperature. Fc was not limited by plant water potentials ranging between −7 and −17 bar. That alfalfa is relatively drought-tolerant is indicated by the fact that no significant stomatal closure seemed to have occurred at water potentials as low as −17 bars. CWFR was correlated with net radiation. Sensible heat advection, however, reduced CWFR since this additional source of energy contributed only to evapotranspiration." @default.
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- W2075123064 date "1981-01-01" @default.
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- W2075123064 title "Environmental effects on the CO2 flux and CO2—Water flux ratio of Alfalfa" @default.
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- W2075123064 doi "https://doi.org/10.1016/0002-1571(81)90042-x" @default.
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