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传统和可生物降解微塑料对玉米土壤生态系统的影响:地面上方和地下

Ziqiang Liu¹, Zhenzhen Wu¹, Yirui Zhang¹

¹Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China; Department of Ecology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.

Journal of hazardous materials

|July 25, 2024

概括

生物降解塑料,如聚烯 (PCL) 显著损害玉米土壤生态系统,减少植物生长和土壤酶活性. 传统的微塑料显示出最小的影响,质疑农业中可生物降解替代品的安全性.

科学领域:

农业生态系统科学农业生态系统科学
环境科学环境科学
土壤科学土壤科学

背景情况:

在农业生态系统中积累的微塑料 (MP) 构成环境和健康风险.
与传统MP相比,生物降解MP的生态影响仍然不清楚.
了解这些影响对于可持续的农业实践至关重要.

研究的目的:

为了比较传统的 (聚乙烯 [PE],聚烯 [PP]) 和可生物降解的 (聚二酸盐/丁烯四甲酸盐 [PBAT],聚烯 [PCL]) MPs 在玉米土壤微观世界中的生态效应.
评估MPs对植物生产,土壤酶活动以及微生物社区结构和功能的影响.

主要方法:

微观宇宙实验是使用玉米土壤生态系统进行的.
传统的 (PE,PP) 和生物降解的 (PBAT,PCL) MPs被添加到0%,1%和5% (w/w) 的度中.
分析了植物生产,土壤酶活动,细菌和真菌社区多样性和网络复杂性.

主要成果:

聚烯酸 (PCL) 的MPs大大降低了植物产量 (73.6-75.2%) 和土壤酶活动 (71.5-95.3%).
传统的MP (PE,PP和PBAT) 对植物生产的影响是微不足道的.
可生物降解的MP通常降低了细菌和真菌的α多样性,改变了网络复杂性,影响因MP类型和度而异.

结论:

可生物降解的MP,特别是PCL,通过抑制微生物活动,可以显著损害农业生态系统的多功能性.
这些发现引发了人们对传统塑料在农业中被生物可降解替代品广泛取代的担忧.
需要进一步的研究来评估农业土壤中可生物降解的MP的长期生态后果.

关键词:

可生物降解的微塑料传统的微塑料是一种微塑料.生态系统的健康微生物社区的微生物社区.土壤生物化学土壤生物化学

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