Meta Analysis
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Tier 1
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Systematic review or meta-analysis. Synthesizes findings across many studies. Strongest evidence.
Environmental Sources
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National-scale distribution of micro(meso)plastics in farmland soils across China: Implications for environmental impacts
Journal of Hazardous Materials2021
152 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 70
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Defu He,
Defu He,
Xiaoting Zhang,
Xiaoting Zhang,
Yongming Luo
Defu He,
Yingxin Chen,
Jiani Hu,
Jiani Hu,
Yingxin Chen,
Jiani Hu,
Defu He,
Yalin Zhang,
Wei Gao,
Wei Gao,
Wei Gao,
Wei Gao,
Xiaoting Zhang,
Xiaoting Zhang,
Xiaoting Zhang,
Xiaoting Zhang,
Xiaoting Zhang,
Jiani Hu,
Yongming Luo
Yongming Luo
Defu He,
Yong Sik Ok,
Yalin Zhang,
Yong Sik Ok,
Defu He,
Yongming Luo
Yingxin Chen,
Yalin Zhang,
Yongming Luo
Xiaoting Zhang,
Defu He,
Defu He,
Yongming Luo
Defu He,
Defu He,
Yongming Luo
Defu He,
Yongming Luo
Yongming Luo
Yongming Luo
Yingxin Chen,
Wei Gao,
Wei Gao,
Wei Gao,
Xiaoting Zhang,
Xiaoting Zhang,
Yong Sik Ok,
Yong Sik Ok,
Jiani Hu,
Jiani Hu,
Jiani Hu,
Yong Sik Ok,
Defu He,
Defu He,
Yongming Luo
Jiani Hu,
Jiani Hu,
Yong Sik Ok,
Yong Sik Ok,
Xiaoting Zhang,
Yalin Zhang,
Yalin Zhang,
Xinyu Li,
Yong Sik Ok,
Yongming Luo
Yong Sik Ok,
Yingxin Chen,
Defu He,
Yongming Luo
Yingxin Chen,
Yingxin Chen,
Defu He,
Yongming Luo
Jiani Hu,
Yongming Luo
Jiani Hu,
Jiani Hu,
Defu He,
Defu He,
Yongming Luo
Wei Gao,
Wei Gao,
Yongming Luo
Xiaoting Zhang,
Yongming Luo
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yongming Luo
Defu He,
Defu He,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yingxin Chen,
Defu He,
Defu He,
Defu He,
Xiaoting Zhang,
Yongming Luo
Yongming Luo
Yongming Luo
Wei Gao,
Defu He,
Yong Sik Ok,
Yong Sik Ok,
Yalin Zhang,
Yong Sik Ok,
Yong Sik Ok,
Defu He,
Yong Sik Ok,
Yongming Luo
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Defu He,
Yong Sik Ok,
Yongming Luo
Yong Sik Ok,
Yongming Luo
Defu He,
Yongming Luo
Yongming Luo
Yongming Luo
Yongming Luo
Yongming Luo
Yongming Luo
Defu He,
Defu He,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yongming Luo
Yongming Luo
Defu He,
Defu He,
Defu He,
Defu He,
Yongming Luo
Yongming Luo
Yongming Luo
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yongming Luo
Yongming Luo
Yongming Luo
Yongming Luo
Defu He,
Defu He,
Yongming Luo
Defu He,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yong Sik Ok,
Yongming Luo
Yong Sik Ok,
Yongming Luo
Summary
Farmland soils across 30 sites in China contained an average of 358 microplastic items/kg, with concentrations higher in arid northern regions; meta-analysis showed that while current soil levels are generally below minimum effective concentrations for harming crops and soil enzymes, they are approaching those thresholds.
Microplastics (MPs) pollution is increasingly appreciated as a significant environmental issue, however, the large-scale pattern of MPs in farmland soils and its associated environmental impacts are unknown. This study investigated a national-scale distribution of micro(meso)plastics (MMPs) in the soil of 30 farmlands across China. The abundance of MMPs in soils was 25.56-2067.78 items kg, with a mean of 358.37 items kg, i.e. 6.79 mg kg or 0.0007% after mass conversion. MPs accounted for 93.1% of MMPs, the abundance varied greatly among different regions, high in arid or semi-arid north but relatively low in mild southwest regions. Major MPs included polypropylene, polyethylene, and polyester, tending to decrease in abundance from surface to deeper soil layers. Further, meta-analysis revealed that MPs exposure influenced bulk density, soil enzymes including fluorescein diacetate hydrolase (FDAse) and urease, and crop biomass, and minimum effective concentrations (MEC) were in the range of 0.0040-10%. We found that actual abundance in the national-scale soils was lower than MEC, but partly overlapped or close, which implies various degrees of environmental impacts. These findings disclose the national-scale pollution pattern of MPs in farmlands and its latent risks to soil environments and crop growth.