A nationwide assessment of microplastic abundance in agricultural soils: The influence of plastic crop covers within the United Kingdom

IF 3.7 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Plants People Planet Pub Date : 2023-08-30 DOI:10.1002/ppp3.10430
Samuel J. Cusworth, W. Davies, M. McAinsh, C. Stevens
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Abstract

Agricultural soils are substantial receptors of plastic pollution. Plastic crop covers, a facet of agriplastics, may represent an important contribution to microplastic load in agricultural soils. The authors present a nationwide study of agricultural soils in the United Kingdom, comparing microplastic load between sites where plastic crop covers are and are not used for carrot and potato production. Sites where plastic crop covers were used received a higher microplastic load compared with sites where no plastic crop cover was used. The effects of microplastic pollution are largely unknown, requiring further research to determine the impact on soil, crop and human health. Agricultural soils are substantial receptors of plastic pollution, with agriplastics potentially making an important contribution to the overall microplastic load to agricultural soils. The intensive use and mismanagement of plastic crop covers, particularly plastic mulch films, nets and fleeces, represent a pollution pathway. In this study, we have analysed the microplastic concentrations in agricultural soils in 324 samples from 108 sites across the United Kingdom, where carrots or potatoes were grown, using a combined digestion and density separation method. Microplastics were stained with Nile Red and quantified using fluorescence microscopy. Microplastic concentrations ranged from 1320 to 8190 particles kg−1, with a mean of 3680 ± 129.1 particles kg−1. Where no plastic crop covers were used for potato and carrot production, a mean of 2667 ± 84.1 particles kg−1 were detected. At sites where plastic crop covers were used in the past 10 years, a mean of 4689 ± 147.1 particles kg−1 were recorded. There was a significant difference in microplastic abundance between sites where plastic crop covers were and were not used (p ≤ 0.001), confirming that plastic crop covers are an important source of microplastics to agricultural soils. Further studies are needed to investigate microplastic occurrence in the environment to better understand their impact on soil, crops and human health.
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农业土壤中微塑料丰度的全国评估:英国塑料作物覆盖的影响
农业土壤是塑料污染的主要受体。塑料作物覆盖,农用塑料的一个方面,可能是农业土壤中微塑料负荷的重要贡献。这组作者提出了一项对英国农业土壤的全国性研究,比较了种植塑料作物覆盖和不种植胡萝卜和土豆的地区的微塑料负荷。与没有使用塑料作物覆盖的地点相比,使用塑料作物覆盖的地点收到了更高的微塑料负荷。微塑料污染的影响在很大程度上是未知的,需要进一步研究以确定对土壤、作物和人类健康的影响。农业土壤是塑料污染的重要受体,农用塑料可能对农业土壤的总体微塑料负荷做出重要贡献。塑料作物覆盖物的大量使用和管理不善,特别是塑料地膜、网和羊毛,是一种污染途径。在这项研究中,我们使用消化和密度分离相结合的方法,分析了来自英国108个种植胡萝卜或土豆的地点的324个样本中农业土壤中的微塑料浓度。微塑料用尼罗红染色,荧光显微镜定量。微塑料浓度范围为1320至8190颗粒kg - 1,平均值为3680±129.1颗粒kg - 1。在马铃薯和胡萝卜生产中未使用塑料作物覆盖的地区,平均检测到2667±84.1颗粒kg−1。在过去10年使用塑料作物覆盖物的地点,平均记录到4689±147.1颗粒kg−1。在使用和未使用塑料作物覆盖的地点之间,微塑料丰度存在显著差异(p≤0.001),证实塑料作物覆盖是农业土壤微塑料的重要来源。需要进一步研究微塑料在环境中的出现情况,以更好地了解它们对土壤、作物和人类健康的影响。
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来源期刊
CiteScore
9.90
自引率
5.90%
发文量
81
审稿时长
12 weeks
期刊介绍: Plants, People, Planet aims to publish outstanding research across the plant sciences, placing it firmly within the context of its wider relevance to people, society and the planet. We encourage scientists to consider carefully the potential impact of their research on people’s daily lives, on society, and on the world in which we live. We welcome submissions from all areas of plant sciences, from ecosystem studies to molecular genetics, and particularly encourage interdisciplinary studies, for instance within the social and medical sciences and chemistry and engineering.
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