Based on a long-term experiment, this paper investigated the CO2 flux in winter wheat growth season under different tillage measures, and simulated the correlation between the flux and soil temperature by regression method. The results indicated that under different tillage measures, the average CO2 emission rate in winter wheat growth season was in the order of moldboard plow tillage (F) > minimum tillage (X) > no-tillage (M), with the value being 343.69, 337.54 and 190.47 mg x m(-2) x h(-1), respectively. There was a significant exponential correlation between CO2 flux and soil temperature, which was most significant for the soil temperature at the depth of 10 cm under F, and relatively significant for the soil temperature at the depth of 10 and 20 cm under X and M. Simulating with the soil temperature at the depth of 10 cm, the CO2 flux in winter wheat growth season was estimated as 1.88 kg x m(-2) under F, 1.89 kg x m(-2) under X, and 1.03 kg x m(-2) under M.
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