The effects of microplastics on greenhouse gas(GHG)emissions vary across different types of agricultural soils,and understanding these variations is crucial for controlling GHG emissions in agricultural fields.In this study,we selected polyurethane microplastics for indoor incubation experiments in two types of agricultural soils:paddy soil and dryland soil.Our aim was to investigate the differences in GHG emissions under different environmental conditions.The results indicated that in paddy soil,the addition of microplastics initially increased CO2 and CH4 emissions,while the impact on N2O emissions was minimal.In contrast,in dryland soil,microplastics reduced CH4 emissions but slightly increased CO2 and N2O emissions.The observed differences in GHG emissions were primarily associated with variations in free carbon and nitrogen fractions,microbial activities induced by changes in soil conditions.These findings can aid in developing strategies to mitigate GHG emissions from agricultural activities by proposing targeted management measures.
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