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| Current scenario and future trends of plastic film residue in farmland topsoil in Inner Mongolia,China |
| Received:March 07, 2022 |
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| KeyWord:residual film;temporal and spatial variation;residual membrane distribution;influence factor |
| Author Name | Affiliation | E-mail | | YIN Shaoyuan | College of Agriculture, Inner Mongolia Agricultural University, Hohhot 010019, China | | | ZHAO Baoping | College of Agriculture, Inner Mongolia Agricultural University, Hohhot 010019, China | zhaobaoping82@163.com | | MI Junzhen | College of Agriculture, Inner Mongolia Agricultural University, Hohhot 010019, China | | | LIU Hongjin | Inner Mongolia Agriculture and Animal Husbandry Ecology and Resource Protection Center, Hohhot 010010, China | | | GUO Xiaoyu | Inner Mongolia Agriculture and Animal Husbandry Ecology and Resource Protection Center, Hohhot 010010, China | | | WU Yan | Inner Mongolia Agriculture and Animal Husbandry Ecology and Resource Protection Center, Hohhot 010010, China | | | BAO Han | Inner Mongolia Agriculture and Animal Husbandry Ecology and Resource Protection Center, Hohhot 010010, China | | | YANG Fan | Inner Mongolia Agriculture and Animal Husbandry Ecology and Resource Protection Center, Hohhot 010010, China | | | WU Junying | College of Agriculture, Inner Mongolia Agricultural University, Hohhot 010019, China | | | LIU Jinghui | College of Agriculture, Inner Mongolia Agricultural University, Hohhot 010019, China | |
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| Abstract: |
| To evaluate the current situation of farmland plastic film residue pollution in Inner Mongolia and provide a scientific basis for the prevention, control, and treatment of farmland plastic film pollution, in April 2021, 30 farmland plastic film residue monitoring points in 10 banners and counties with a history of film covering usage of 1~40 years were selected. The distribution characteristics and influencing factors of farmland plastic film residue in each monitoring point were determined. The average residue of plastic film in the cultivated layer (0~30 cm)of Inner Mongolia has been higher than the limit of farmland residue in China, and the difference in residue in the three regions is noticeable, indicating that plastic residues in the northern plateau and mountain region were highest, followed by the northeast humid, northwest arid, and semi-arid plain regions. Farmers' awareness of recycling has a considerable impact on the amount of residual film in farmland. Additionally, residual soil film is mainly concentrated in the 0~10 cm soil layer, and the proportion of residual film in the 0~10 cm soil layer decreases with the increase of film covering years. The content of residual film in the 10~30 cm soil layer increases with the increase of film covering years. With the increase of planting years, the amount of residual film(<4 cm2)in a small area increases in deep soil. The residual film pollution of farmland in Inner Mongolia is concerning, and the amount and fragmentation of residual film in the soil layer below 10 cm is increasing. Measures such as plastic film recovery and biodegradable film replacement should be strengthened to alleviate the residual film pollution in the regional crop planting system. |
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