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农业土壤中小型微塑料的时空空间演变来自长期使用猪的农业土壤

Zefang Zhu¹, Jinfeng Yang¹, Ning Liu¹

¹College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China; National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China; Monitoring and Experimental Station of Corn Nutrition and Fertilization in Northeast Region, Ministry of Agriculture of China, Shenyang 110866, China.

Environmental research

|May 17, 2025

概括

长期使用猪便可显著增加农业土壤中的小微塑料 (sMPs). 这些发现凸显了迫切需要解决有机肥污染的smps问题.

科学领域:

环境科学环境科学
土壤科学土壤科学
聚合物科学聚合物科学

背景情况:

有机肥对农业至关重要,但可能被小微塑料污染 (sMPs).
在长期施肥的土壤中了解sMP积累和转化是有限的.
在有扩大有机投入的农业土壤中对微型农产品市场动态的研究很少.

研究的目的:

测量和描述不同长期施肥方案下的土壤中的sMPs.
评估农业土壤中sMPs的时间和空间动态.
调查猪施加对土壤sMP污染的影响.

主要方法:

使用激光直接红外 (LDIR) 光谱仪用于sMP量化和表征.
分析了四种不同的施肥处理的土壤样本:没有肥料 (CK),猪 (M),NPK肥料和NPK和猪 (MNPK) 组合.
在44年的时间里 (1979-2023) 评估了sMP的丰度和组成.

主要成果:

猪的应用导致sMP丰富度的显著增加,到2023年达到21,376±1008个项目kg−1 (1979年增长了180%).
与对照组相比,含猪 (M和MNPK) 的土壤显示出较高的sMP度 (分别为7183±568和5557±329个项目kg-1).
随着土壤深度的增加,sMP的丰度通常会增加,30-100微米范围的颗粒构成了sMP总量的46%以上.

结论:

长期使用猪便会大大提高土壤中的sMP度.
修改土壤中的聚合物类型反映了在肥中发现的聚合物类型,这表明肥是主要来源.
增加的土壤sMP水平在农业系统中带来了越来越大的污染风险.

关键词:

长期的受精长期的受精微塑料是一种微塑料.猪便是猪便的一种.时间空间进化的进化.

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