【摘要】 因微塑料在不同农田土壤中对温室气体排放的影响存在差异，故认识其差异对农田温室气体排放控制有重要意义。根据稻田和旱地2种农田土壤类型，选取聚氨酯微塑料开展室内培养实验，探究不同环境条件下农田温室气体排放的差异。结果表明，在稻田土壤中，添加微塑料可促进CO₂和CH₄的排放，而对N₂O排放的影响较小；在旱地土壤中，添加微塑料可减少CH₄排放，促进CO₂和N₂O的排放。微塑料对不同农田温室气体排放的影响差异，主要与土壤条件变化引起的游离碳、氮组分和微生物活动有关。该研究有助于改善和控制农业种植活动中的温室气体排放，并有针对性的提出治理措施。更多还原

【Abstract】 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 CO₂and 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.更多还原