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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

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2024

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Ma, Kai
Fu, Yanmei

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National Natural Science Foundation of China: 32201341

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Plant Biology. Wiley. 2024, 26(2), pp. 223-231. ISSN 1435-8603. eISSN 1438-8677. Available under: doi: 10.1111/plb.13612

Zusammenfassung

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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570 Biowissenschaften, Biologie

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ISO 690MA, Kai, Yanmei FU, Yanjie LIU, 2024. The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition. In: Plant Biology. Wiley. 2024, 26(2), pp. 223-231. ISSN 1435-8603. eISSN 1438-8677. Available under: doi: 10.1111/plb.13612
BibTex
@article{Ma2024-01-10effec-69159,
  year={2024},
  doi={10.1111/plb.13612},
  title={The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition},
  number={2},
  volume={26},
  issn={1435-8603},
  journal={Plant Biology},
  pages={223--231},
  author={Ma, Kai and Fu, Yanmei and Liu, Yanjie}
}
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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.</dcterms:abstract>
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