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Biodegradable Microplastic-Driven Change in Soil pH Affects Soybean Rhizosphere Microbial N Transformation Processes
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-07-18 , DOI: 10.1021/acs.jafc.4c04206 Jianling Wang 1 , Weitao Liu 1 , Aurang Zeb 1 , Qi Wang 1 , Fan Mo 1 , Ruiying Shi 1 , Yuebin Sun 2 , Fayuan Wang 3
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-07-18 , DOI: 10.1021/acs.jafc.4c04206 Jianling Wang 1 , Weitao Liu 1 , Aurang Zeb 1 , Qi Wang 1 , Fan Mo 1 , Ruiying Shi 1 , Yuebin Sun 2 , Fayuan Wang 3
Affiliation
The potential impacts of biodegradable and nonbiodegradable microplastics (MPs) on rhizosphere microbial nitrogen (N) transformation processes remain ambiguous. Here, we systematically investigated how biodegradable (polybutylene succinate, PBS) MPs and nonbiodegradable (polyethylene, PE) MPs affect microbial N processes by determining rhizosphere soil indicators of typical Glycine max (soybean)-soil (i.e., red and brown soils) systems. Our results show that MPs altered soil pH and dissolved organic carbon in MP/soil type-dependent manners. Notably, soybean growth displayed greater sensitivity to 1% (w/w) PBS MP exposure in red soil than that in brown soil since 1% PBS acidified the red soil and impeded nutrient uptake by plants. In the rhizosphere, 1% PBS negatively impacted microbial community composition and diversity, weakened microbial N processes (mainly denitrification and ammonification), and disrupted rhizosphere metabolism. Overall, it is suggested that biodegradable MPs, compared to nonbiodegradable MPs, can more significantly influence the ecological function of the plant–soil system.
中文翻译:
可生物降解微塑料驱动的土壤 pH 值变化影响大豆根际微生物氮转化过程
可生物降解和不可生物降解的微塑料 (MP) 对根际微生物氮 (N) 转化过程的潜在影响仍然不明确。在这里,我们通过确定典型大豆(大豆)-土壤(即红土和棕壤)系统的根际土壤指标,系统地研究了可生物降解(聚丁二酸丁二酯,PBS)MP和不可生物降解(聚乙烯,PE)MP如何影响微生物氮过程。我们的结果表明,MP 以 MP/土壤类型依赖的方式改变土壤 pH 值和溶解有机碳。值得注意的是,红壤中大豆生长对 1% (w/w) PBS MP 暴露的敏感性高于棕壤,因为 1% PBS 使红土酸化并阻碍植物对养分的吸收。在根际,1% PBS 对微生物群落组成和多样性产生负面影响,削弱微生物氮过程(主要是反硝化和氨化),并扰乱根际代谢。总体而言,与不可生物降解的 MP 相比,可生物降解的 MP 可以更显着地影响植物-土壤系统的生态功能。
更新日期:2024-07-18
中文翻译:
可生物降解微塑料驱动的土壤 pH 值变化影响大豆根际微生物氮转化过程
可生物降解和不可生物降解的微塑料 (MP) 对根际微生物氮 (N) 转化过程的潜在影响仍然不明确。在这里,我们通过确定典型大豆(大豆)-土壤(即红土和棕壤)系统的根际土壤指标,系统地研究了可生物降解(聚丁二酸丁二酯,PBS)MP和不可生物降解(聚乙烯,PE)MP如何影响微生物氮过程。我们的结果表明,MP 以 MP/土壤类型依赖的方式改变土壤 pH 值和溶解有机碳。值得注意的是,红壤中大豆生长对 1% (w/w) PBS MP 暴露的敏感性高于棕壤,因为 1% PBS 使红土酸化并阻碍植物对养分的吸收。在根际,1% PBS 对微生物群落组成和多样性产生负面影响,削弱微生物氮过程(主要是反硝化和氨化),并扰乱根际代谢。总体而言,与不可生物降解的 MP 相比,可生物降解的 MP 可以更显着地影响植物-土壤系统的生态功能。