| 基于Meta分析的微塑料特性对土壤有机碳及其组分的影响 |
| 摘要点击 250 全文点击 13 投稿时间：2025-04-07 修订日期：2025-08-04 |
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| 中文关键词 微塑料（MPs） 生物可降解微塑料（B-MPs） 土壤有机碳组分 Meta分析 混合效应模型 |
| 英文关键词 microplastics（MPs） biodegradable microplastics（B-MPs） soil organic carbon fraction Meta-analysis mixed-effects model |
| DOI 10.13227/j.hjkx.202504086 |
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| 中文摘要 |
| 近年来微塑料（MPs）对土壤有机碳（SOC）及其组分的潜在影响引起了广泛关注. 然而现有研究往往侧重于单一MPs特性对单一SOC组分的影响，难以揭示MPs多种特性对不同SOC组分之间相互转化的影响机制. 采用Meta分析方法，对2017年至2025年5月间发表的51篇文献846个案例数据进行了整合分析，利用R语言随机效应模型和混合效应模型系统评估了MPs特性（类型、质量分数和粒径）对SOC及其组分的影响. 结果显示，添加MPs使SOC、溶解性有机碳（DOC）、微生物生物量碳（MBC）和矿物结合态有机碳（MAOC）组分含量分别显著增加25.14%、30.42%、31.90%和62.50%，对土壤颗粒态有机碳（POC）和高锰酸钾易氧化有机碳（POXC）含量没有显著影响. MAOC含量的增加反映了MPs对土壤有机碳长期存留和稳定性具有潜在促进作用. MPs质量分数与其对SOC、DOC、MBC和MAOC含量影响的效应值显著正相关，与POXC负相关；而MPs粒径与其对SOC、DOC和POXC含量影响的效应值显著负相关，与MAOC正相关. MPs对稳定性有机碳组分（MAOC）与活性有机碳组分（POC和POXC）含量影响的组间差异表明MPs可能促进了活性有机碳组分向稳定性有机碳组分的转化. 研究从SOC组分互相转化的角度，分析了添加MPs后土壤有机碳组分含量的变化特征，有助于探究MPs对土壤碳循环过程的复杂影响机制. |
| 英文摘要 |
| The potential effects of microplastics （MPs） on soil organic carbon （SOC） and its components have attracted much attention in recent years. However， existing research tends to focus on the study of the effect of a single MPs characteristic on a single SOC component， and it is difficult to reveal the mechanism of the effect of multiple MPs characteristics on the inter-transformation among SOC components. Therefore， in this study， the Meta-analysis method was used to integrate and analyze 846 case data from 51 publications published between 2017 and May 2025， and the effects of MPs characteristics （type， mass fraction， and particle size） on SOCs and their fractions were systematically evaluated using the R language random-effects model and the mixed-effects model. The results showed that the addition of MPs significantly increased the content of soil organic carbon （SOC）， dissolved organic carbon （DOC）， microbial biomass carbon （MBC）， and mineral-bound organic carbon （MAOC） fractions by 25.14%， 30.42%， 31.90%， and 62.50%， respectively， while no significant effect was observed on the content of particulate organic carbon （POC） and permanganate-oxidizable organic carbon （POXC）. The increase in MAOC content reflected the potential contribution of MPs to the long-term retention and stability of SOC. The mass fraction of MPs was significantly positively correlated with its effect size on SOC， DOC， MBC， and MAOC concentrations， but significantly negatively correlated with its effect size on POXC， whereas the particle size of MPs was significantly negatively correlated with its effect size on SOC， DOC， and POXC， and positively correlated with its effect size on MAOC. Between-group differences in the effects of MPs on the content of stable organic carbon fractions （MAOC） versus reactive organic carbon fractions （POC and POXC） suggest that MPs may facilitate the conversion of reactive organic carbon fractions to stable organic carbon fractions. This study analyzed the characteristics of the changes in soil organic carbon content after the addition of MPs from the perspective of the mutual transformation of soil organic carbon components， which helps to explore the complex mechanism of the influence of MPs on the soil carbon cycle process. |
