Abstract
This article presents the measurement results of CO2 and heat fluxes using the eddy covariance system between an old-age spruce forest and the atmosphere. It further examines daily and seasonal courses of CO2 net exchange, ecosystem respiration, and gross photosynthesis. A close relationship has been established between the average daily CO2 net exchange and net radiation over the course of a year. The efficiency of water use relative to organic matter production in the spruce forest has been calculated.
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