Organic fertilizer and irrigation water are the primary sources of microplastics in the facility soil, Beijing
文献类型： 外文期刊
作者： Guo, Sen 1 ; Zhang, Jiajia 1 ; Liu, Jiawei 1 ; Guo, Ning 3 ; Zhang, Lei 3 ; Wang, Shengtao 3 ; Wang, Xuexia 1 ; Zhao, Meng 1 ; Zhang, Baogui 2 ; Chen, Yanhua 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China
2.China Agr Univ, Coll Land Sci & Technol, Beijing 100193, Peoples R China
3.Beijing Cultivated Land Construct & Protect Ctr, Beijing 100029, Peoples R China
关键词： Microplastic; Facility agriculture soil; Distribution characteristic; Ecological risk; Potential source
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）
ISSN： 0048-9697
年卷期： 2023 年 895 卷
页码：
收录情况： SCI
摘要： The large-scale utilization of plastic products in agricultural facility production has resulted in considerable accumulation of microplastics in the soil. However, there is a lack of systematic research on the accumulation and distribution of microplastics in facility agriculture. This study examined the presence of microplastics in the 15 representatives of Beijing facility agriculture soil in five districts with different planting years, and assessed the potential pollution risks. The abundance of microplastics in soil layers at a depth of 0-10, 10-20, and 20-30 cm was 896.5 & PLUSMN; 80.0 (range, 160-2120), 630.6 & PLUSMN; 47.0 (180-1340), and 445.3 & PLUSMN; 47.0 (80-1480) items/kg, respectively. Overall, the microplastics were primarily fiber-shaped (72.2 %), white (75.9 %), 1-2 mm in size (37.9 %), and composed of polypropylene and polyethene. The risk assessment indices of the microplastics in the 0-10, 10-20, and 20-30 cm soil layers were 272.1, 289.5, and 291.6, respectively, representing a risk level of 4 in each case. Using the conditional fragmentation model, we found that the microplastics in facility soil featured low stability and small sizes, and their primary sources were organic fertilizer and irrigation water. The number of mulching years, irrigation method, and the amount of organic fertilizer applied, influenced the accumulation of microplastics in the facility soil. This study provides scientific evidence supporting the pollution levels and need for risk control related to microplastics in facility soils.
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