Greenhouse gas emissions during composting inevitably cause environmental pollution. This study investigated the effects of 10 % vermiculite of four particle sizes (<1.5 mm, 1.5–3 mm, 3–5.5 mm and 5.5–8 mm) on greenhouse gas emissions during vermicomposting of corn stover and cow dung. The results revealed that vermiculite reduced CH4 and N2O emissions but increased CO2 emissions. Vermiculite with a particle size of 3–5.5 mm presented the greatest environmental benefits, increasing cumulative CO2 emissions by 19 % and reducing CH4 and N2O emissions by 49 % and 62 %, respectively. A negative correlation was found between the specific surface area of vermiculite and cumulative greenhouse gas emissions (r = −0.7949). Furthermore, vermiculite intensified microbial interactions and accelerated microbial community succession. These results have important implications for understanding how vermiculite regulates greenhouse gas emissions and microbial mechanisms during the vermicomposting process.

中文翻译：

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蛭石改变了蚯蚓堆肥中的温室气体排放和微生物群落演替：粒度调查


堆肥过程中的温室气体排放不可避免地会造成环境污染。本研究调查了四种粒径（<1.5 mm、1.5-3 mm、3-5.5 mm 和 5.5-8 mm）的 10% 蛭石对玉米秸秆和牛粪蚯肥过程中温室气体排放的影响。结果表明，蛭石减少了 CH4 和 N2O 排放，但增加了 CO2 排放。粒径为 3-5.5 毫米的蛭石具有最大的环境效益，累积二氧化碳排放量增加了 19%，CH4 和 N2O 排放量分别减少了 49% 和 62%。发现蛭石的比表面积与累积温室气体排放量呈负相关 （r = −0.7949）。此外，蛭石加强了微生物相互作用并加速了微生物群落的演替。这些结果对于了解蛭石如何在蚓粪堆肥过程中调节温室气体排放和微生物机制具有重要意义。