Residual mulch-film characteristics affect heavy metal migration of different soil layers in the subtropical croplands of China☆
文献类型: 外文期刊
第一作者: Fei, Jiangchi
作者: Fei, Jiangchi;Zou, Tao;Geng, Mengjiao;Luo, Gongwen;Pang, Chunyu;Huang, Ying;Peng, Jianwei;Fei, Jiangchi;Zou, Tao;Geng, Mengjiao;Luo, Gongwen;Pang, Chunyu;Huang, Ying;Peng, Jianwei;Fei, Jiangchi;Jiang, Yuxin;Yang, Pinling
作者机构: Hunan Agr Univ, Coll Resources, Changsha 410128, Peoples R China;Natl Engn Lab Efficient Utilizat Soil & Fertilizer, Changsha 410128, Peoples R China;Chinese Acad Agr Sci, Beijing 100081, Peoples R China;Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China;Huaihua Meteorol Off, Huaihua 418000, Peoples R China
关键词: Subtropical China; Residual mulch film; Soil metals; New pollution migration
期刊名称:ENVIRONMENTAL POLLUTION ( 2023影响因子:7.6; 五年影响因子:8.3 )
ISSN: 0269-7491
年卷期: 2024 年 360 卷
收录情况: SCI
摘要: In recent years, as the abundance of residual mulch film (RMF) in agricultural soil continues to increase, whether the adsorption capacity of its surface affects the migration of heavy metals is a topic of current interest for scholars. Herein, this study investigated the distribution of RMF abundance and metal concentration in different soil layers of 75 plastic-mulching croplands in subtropical China; meanwhile, we also explored the associations of RMF characteristics with metal concentration. The results showed that land type, film mulching amount, and film mulching time were the main factors affecting RMF abundance, distribution, and particle size composition. The highest abundance of RMF was found in the garden soils (910 n center dot kg- 1) with more than 15 years mulching period and more than 19.5 kg hm- 2 of annual mulch amount. The lowest abundance of RMF was occurred in the group of field and conservation agricultural land (237 n center dot kg- 1). Moreover, the concentrations of metals in soil, especially Cd, Cr, Cu, and Pb, were closely related to the extent of RMF contamination in the soil environment. In the 0-10 cm and 10-20 cm soil layers, microplastic abundance exhibited a negative correlation with Cr and Cu concentrations and a positive correlation with Pb concentration. Based on the above findings, it is demonstrated that RMF significantly influences the mobility of metals in soil via adsorption processes, with potential synergistic effects between RMF and heavy metals posing a heightened risk to the soil environment.
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