研究报告

  • 鄢紫薇,张秀玲,林杉,王玺,王峰,杨倩,徐晗,胡荣桂.微塑料污染和蚯蚓活动对黄棕壤温室气体排放的影响[J].环境科学学报,2022,42(5):416-424

  • 微塑料污染和蚯蚓活动对黄棕壤温室气体排放的影响
  • Effects of microplastics pollution and earthworm activity on greenhouse gas emissions from yellow brown soil
  • 基金项目:国家重点研发计划项目(No.2017YFD0200106); 武汉市科技计划项目(No.2020020601012284)
  • 作者
  • 单位
  • 鄢紫薇
  • 华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,武汉 430070
  • 张秀玲
  • 华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,武汉 430070
  • 林杉
  • 华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,武汉 430070
  • 王玺
  • 华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,武汉 430070
  • 王峰
  • 湖北省生态环境科学研究院,武汉 430072
  • 杨倩
  • 湖北工业大学湖北流域生态文明建设研究中心,武汉 430068
  • 徐晗
  • 华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,武汉 430070
  • 胡荣桂
  • 华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,武汉 430070
  • 摘要:为明确蚯蚓暴露于不同量聚丙烯(PP)微塑料后对土壤CO2、N2O排放的影响,采用湖北当阳橘园土壤,进行室内培养试验,设置了5个处理:对照(CK)、接种蚯蚓(E)、接种蚯蚓并添加低量聚丙烯(0.25%干土重m/m, M1+E)、接种蚯蚓并添加中量聚丙烯(2%干土重m/m,M2+E)和接种蚯蚓并添加高量聚丙烯(7%干土重m/m,M3+E).结果表明:接种蚯蚓可以显著增加土壤CO2、N2O的排放,相比未接种蚯蚓(CK)处理,土壤的CO2、N2O累积排放量分别增加了4.17、1.79倍,且接种蚯蚓显著提高了土壤pH.而微塑料添加后显著降低了土壤CO2、N2O排放,其中,接种蚯蚓并添加高量微塑料对土壤的CO2、N2O排放抑制效果最明显,分别降低了16.99%、27.28%.微塑料的添加会显著降低蚯蚓生物量,低、中、高量微塑料处理下蚯蚓生物量损失值较仅接种蚯蚓增加了29%、48%、102%.该研究可为理解微塑料污染及蚯蚓活动对土壤温室气体排放的影响提供理论依据.
  • Abstract:In order to clarify the effects of earthworms with different amounts of polypropylene (PP) microplastics exposure on soil CO2 and N2O emissions, an incubation experiment was conducted using orange garden soil. Five treatments were set up: Control (CK), earthworm inoculation (E), earthworm inoculation combined with the low amount of polypropylene addition (0.25% dry soil weight m/m, M1+E), earthworm inoculation combined with the medium amount of polypropylene addition (2% dry soil weight m/m, M2+E), earthworm inoculation combined with the high amount of polypropylene addition (7% dry soil weight m/m, M3+E). The results showed that pure earthworm inoculation significantly increased soil CO2 and N2O emission by 4.17 and 1.79 times, respectively, and the soil pH was significantly increased by pure earthworm inoculation. However, the addition of microplastics significantly reduced soil CO2 and N2O emission, the reduction by earthworm inoculation and the high amount of polypropylene addition (M3+E) was most, this treatment decreased soil CO2 and N2O emission by 16.99% and 27.28%, respectively. Compared with pure earthworm inoculation, the addition of microplastics significantly reduced the earthworm biomass, and the loss of earthworm biomass increased by 29%, 48%, and 102% under low, medium, and high amount of microplastics, respectively. This study provides a theoretical basis for understanding the effects of microplastics pollution and earthworm activities on soil greenhouse gas emissions.

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