Effects of the oversized microplastic pollution layer on soil aggregates and organic carbon at different soil depths

Liu, Shuo; Niu, Shi-Hua; Xiang, Lei; Liao, Xindi; Xing, Si-Cheng

doi:10.1016/j.jhazmat.2023.131014

Cited by 23 publications

(8 citation statements)

References 45 publications

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“…Although PCL did not influence specific root length, it can reduce overall plant growth because of its impact on both physical and chemical pathways. These include alterations in soil structure, chemical changes (e.g., overproduction of reactive oxygen species), a reduction in metabolic activity, and influence on soil functional gene expression (Fortun a et al 2022;Tamayo-Belda et al 2022;Liu et al 2023). For example, PCL increased soil aggregate content while reducing soil organic carbon content (Liu et al 2023).…”

Section: Discussionmentioning

confidence: 99%

“…These include alterations in soil structure, chemical changes (e.g., overproduction of reactive oxygen species), a reduction in metabolic activity, and influence on soil functional gene expression (Fortun a et al 2022;Tamayo-Belda et al 2022;Liu et al 2023). For example, PCL increased soil aggregate content while reducing soil organic carbon content (Liu et al 2023). Soil aggregates are critical to shaping soil structure, influencing soil porosity, and thereby affecting plant root growth (Wang et al 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Soil aggregates are critical to shaping soil structure, influencing soil porosity, and thereby affecting plant root growth (Wang et al 2022). Liu et al (2023) found that PCL downregulated expression of the crucial carbon metabolism gene coxL and suppressed carbon metabolism genes in host bacteria to soil organic carbon, leading to a decrease in soil organic carbon content. Reduced soil organic carbon negatively impacts plant growth and productivity (Murphy 2015), which may be another reason for the impact of PCL on E. sativa growth.…”

Section: Discussionmentioning

confidence: 99%

“…For example, PCL increased soil aggregate content while reducing soil organic carbon content (Liu et al . 2023). Soil aggregates are critical to shaping soil structure, influencing soil porosity, and thereby affecting plant root growth (Wang et al .…”

Section: Discussionmentioning

confidence: 99%

“…2022; Liu et al . 2023). For example, PCL increased soil aggregate content while reducing soil organic carbon content (Liu et al .…”

Section: Discussionmentioning

confidence: 99%

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The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition

Ma,

Fu,

Liu

2024

Plant Biol J

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Microplastics pollution of agricultural soil is a global environmental concern because of its potential risk to food security and human health. Although many studies have tested the direct effects of microplastics on growth of Eruca sativa Mill., little is known about whether these effects are regulated by fertilization and weed competition in field management practices. Here, we performed a greenhouse experiment growing E. sativa as target species in a three‐factorial design with two levels of fertilization (low versus. high), two levels of weed competition treatments (weed competition versus no weed competition) and five levels of microplastic treatments (no microplastics, Polybutylene adipate‐co‐terephthalate [PBAT], Polybutylene succinate [PBS], Polycaprolactone [PCL] or Polypropylene [PP]). Compared to the soil without microplastics, PBS and PCL reduced aboveground biomass and leaf number of the E. sativa. PBS also resulted in increased root allocation and thicker roots in E. sativa. In addition, fertilization significantly mitigated the negative effects of PBS and PCL on aboveground biomass of E. sativa, but weed competition significantly promoted these effects. Although fertilization alleviated the negative effect of PBS on aboveground biomass, such alleviation became weaker under weed competition than when E. sativa grew alone. The results indicate that the effects of specific polymer types on E. sativa growth could be regulated by fertilization, weed management, and even their interactions. Therefore, reasonable on‐farm management practices may help in mitigating the negative effects of microplastics pollution on E. sativa growth in agricultural fields.

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Section: Discussionmentioning

confidence: 99%