Department of Agricultural Chemistry, Chonnam National University, Gwangju, 61186, South Korea.
Department of Agricultural Chemistry, Chonnam National University, Gwangju, 61186, South Korea; Department of Agricultural and Biological Chemistry, Chonnam National University, Gwangju, 61186, South Korea.
Chemosphere. 2023 Oct;339:139660. doi: 10.1016/j.chemosphere.2023.139660. Epub 2023 Jul 26.
The presence of microplastics in agricultural soils has emerged as a significant environmental concern due to their persistent nature. Microplastics of different properties (i.e., types, shapes, size, concentration) are present in the environment, but the studies on the effect of microplastics having different properties are limited. Thus, this study investigated the effects of different microplastics (low-density polyethylene (LDPE) fragments, polyvinyl chloride (PVC) fragments, and LDPE fiber) in soil on the growth of lettuce (Lactuca sativa L.). Pot tests were carried out to study the effect of a range of microplastic concentrations and different shapes and types of microplastics in soil on the lettuce growth. The different growth parameters such as lettuce weight, lengths, and chlorophyll contents were measured and compared. The results showed that the adverse effects of the microplastics on the lettuce growth increased with increasing microplastic concentration. The effects of LDPE fragments and fibers on the root weights and the chlorophyll contents were microplastic shape-dependent. Also, the effects of LDPE fragments and PVC fragments on the shoot and root weights and the chlorophyll contents were microplastic type-dependent. Among the three microplastics studied, LDPE fragments tend to have greater effects on the lettuce growth than the other microplastics. Overall, the results show that the effects of microplastics on different growth parameters of lettuce can be shape- and/or type-dependent. The presence of microplastics having different properties make the understanding the effects of microplastics on plants difficult, and this necessitates further studies.
由于其持久性，农业土壤中存在的微塑料已成为一个重要的环境关注点。不同特性（即类型、形状、大小、浓度）的微塑料存在于环境中，但关于具有不同特性的微塑料的影响的研究有限。因此，本研究调查了不同微塑料（低密度聚乙烯（LDPE）碎片、聚氯乙烯（PVC）碎片和 LDPE 纤维）在土壤中对生菜（Lactuca sativa L.）生长的影响。进行了盆栽试验以研究土壤中不同浓度的微塑料和不同形状和类型的微塑料对生菜生长的影响。测量并比较了生菜重量、长度和叶绿素含量等不同生长参数。结果表明，微塑料对生菜生长的不利影响随着微塑料浓度的增加而增加。LDPE 碎片和纤维对根重和叶绿素含量的影响与微塑料形状有关。此外，LDPE 碎片和 PVC 碎片对茎叶重和叶绿素含量的影响与微塑料类型有关。在所研究的三种微塑料中，LDPE 碎片对生菜生长的影响似乎大于其他两种微塑料。总体而言，研究结果表明，微塑料对生菜不同生长参数的影响可能与形状和/或类型有关。不同特性的微塑料的存在使得理解微塑料对植物的影响变得困难，这需要进一步的研究。
