Received July 14, 1992,Revised , Accepted , Available online

Volume 5,1993,Pages 470-480

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A synchronous observation of field microclimate parameters using a method of infrared analysis with additional air channel and circuit systems is introduced in this paper.The concentration and the flux density of CO2 in wheat field and maize field were studied.The data in several years were calculated using aerodynamic method and satisfactory results were obtained.Relation of CO2 flux to global radiation,net radiation,turbulent exchange coefficient and wind velocity were also analyzed and discussed integrated with practical aspects.

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