[Objective] The soil respiration characteristics in terraced fields under different film mulching conditions in the loess area were studied

in order to provide scientific basis for exploring reasonable agricultural plastic film mulching measures of soil carbon cycle.[Methods] The study set up three treatments for experiments:bare land

white film land and black film land.[Results] ① The daily variation of soil respiration rate of corn fields with different film mulching conditions showed a single-peak curve trend

and the daily average value was as follows:black film land>white film land>bare land

and the soil respiration rate of different mulching treatments was significantly different. ② The change of soil respiration rate of the white film land and the black film land in different months was as follows:July > May > March > September > November. The change of soil respiration rate of the bare land in different months was as follows:July > March > September > May > November. The soil respiration activity in summer was very intense

and the soil respiration rate in different months of different film mulching conditions was significantly different. ③ The annual soil CO2 emissions from the soil of different mulching films were as follows:black film land>white film land>bare land

and the annual CO2 emissions from soil in summer and autumn were higher than those in spring and winter. ④ The soil respiration rate of different film-mulched corn fields had a good correlation with the surface temperature and 5 cm soil temperature

and both showed extremely significant correlations. The 5 cm soil temperature of the film-mulched corn field had a higher impact on the soil respiration rate than the surface temperature

and vice versa in bare land.[Conclusion] Under different mulching conditions

the soil moisture content from the surface to the deep layer changes in an S-shaped curve. The soil moisture in 0-60 cm soil layer was significantly lower in bare land than in the other two film-mulched land. Soil respiration rate and CO2 release of soil respiration increased under different mulching conditions

which could effectively improve the soil carbon cycle environment of terraced land in loess area.