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微塑料对土系统中的光合作用碳分配及其在土壤微生物群体的利用的影响

Zhi'e Hu¹, Mouliang Xiao², Jialing Wu³

¹State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo 315211, China.

Journal of hazardous materials

|January 19, 2024

概括

微塑料 (MP) 显著改变了大米植物分配碳的方式,减少了根吸收和增加了在米土壤中的微生物碳利用. 这会影响土壤的碳循环.

科学领域:

环境科学环境科学
土壤科学土壤科学
生态生态学生态生态学

背景情况:

微塑料 (MP) 是普遍存在的环境污染物.
它们对大米田系统中碳分配的影响尚不清楚.
研究MP对植物土壤碳动态的影响对于生态系统健康至关重要.

研究的目的:

量化聚乙烯 (PE) 和聚乙烯 (PVC) 微塑料对大米中的光合作用碳分配的影响.
确定微塑料如何影响土壤微生物利用植物衍生的碳.
评估大米生态系统中碳循环的后果.

主要方法:

使用13C-CO2脉冲标记来追踪大米土壤系统中的碳流.
应用不同度的PE和PVC微塑料 (0.01%和1%w/w).
在植物组织,土壤有机碳和微生物生物质 (PLFA) 中分析了13C的分布,标记后24小时.

主要成果:

微塑料处理使大米根中的光合作用碳减少了30-54%.
PVC微塑料显著增加了土壤有机碳中的13C (4.3-4.7倍).
微塑料改变了对微生物群落的碳分配,特别是在特定条件下显著增加了真菌PLFA (175-197%).

结论:

微塑料破坏了在米土壤中植物衍生的碳的分配.
MPs增强了微生物的碳利用,特别是真菌,影响了土壤的碳捕获.
这些发现强调了微塑料在改变米生态系统碳循环中的重要作用.

关键词:

(13)CO(2) 脉冲标签的使用情况.脂脂肪酸是一种脂脂肪酸.子体的位置子体的位置土壤有机碳土壤有机碳

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