干旱区生态环境知识资源中心(Arid): Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang)

Arid

DOI	10.1016/j.envpol.2022.119162
	Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang)
	Liu, Hao; Wang, Xiyuan; Shi, Qingdong; Liu, Yuying; Lei, Haifeng; Chen, Yutong
通讯作者	Wang, XY
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2022
卷号	303
英文摘要	Although microplastic pollution in the soil environment is currently an important research topic, few studies have focused on farmland soil in arid regions. This study investigated the abundances, sizes, polymer compositions, and forms of microplastics across nine agricultural plots cultivated with maize, sunflower, and potato (three of each crop) plants to determine the influences of different cropping characteristics and agricultural practices. The study area was within the arid region of the Ulungur River basin in Qinghe County, Altay, Xinjiang, China. The main forms of microplastics were fragments and fibers, and polyethylene was the dominant polymer (91.6%). The microplastic abundance ranged from 11 347 items/kg(dw) to 78 061 items/kg(dw) (mean of 52 081.7 items/kg(dw)). The abundance and proportion of microplastics with a diameter of < 0.2 mm were significantly higher in the sunflower and maize plots (i.e., tall crops) than in the potato plots (i.e., short crops) (p < 0.05). This is due to straw residues affecting the migration and recovery of the mulch. The abundance and fragmentation of microplastics were significantly higher in the sunflower and maize plots where plastic mulch was extensively used because these tall crops anchored the mulch near their stem-root systems. The mulch was then slowly aged (e.g., via wind erosion) before being fragmented due to agricultural practices (e.g., mechanical plowing and residue retention). Although microplastics sourced from mulch are probably immobilized by straw residues in the short term, fragile and easily broken pieces of mulch are eventually released into the soil due to agricultural practices. The findings suggest that different cropping characteristics can affect the abundance and fragmentation of microplastics in agricultural soils, even within the same region, and thus the level and type of microplastic pollution. Traditional plastic mulch should be replaced with biodegradable mulch to reduce microplastic pollution in agricultural fields.
英文关键词	Agricultural soil Arid terrestrial ecosystems Cropping characteristics Microplastics Residue retention
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000792631700005
WOS关键词	ENVIRONMENTAL-SAMPLES ; POLLUTION ; ECOSYSTEM ; SHANGHAI ; PLASTICS ; FISH ; SEA
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392490
推荐引用方式 GB/T 7714	Liu, Hao,Wang, Xiyuan,Shi, Qingdong,et al. Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang)[J],2022,303.
APA	Liu, Hao,Wang, Xiyuan,Shi, Qingdong,Liu, Yuying,Lei, Haifeng,&Chen, Yutong.(2022).Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang).ENVIRONMENTAL POLLUTION,303.
MLA	Liu, Hao,et al."Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang)".ENVIRONMENTAL POLLUTION 303(2022).