1. 内蒙古河套灌区农田地膜残留量分布特征及影响因素.
- Author
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包明哲, 红梅, 赵巴音那木拉, 兴安, 叶贺, 沈钦国, and 王力群
- Subjects
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PLASTIC films , *BIODEGRADABLE plastics , *PLASTIC mulching , *SOIL texture , *PLASTIC recycling , *SANDY loam soils - Abstract
A questionnaire survey was conducted in different crop-planting areas, and typical sample points were analyzed according to the present situation of plastic film and the residue in soil in the Hetao irrigation area. The results showed that the level of plastic film pollution was moderate, and that the residual amount of plastic film in farmland was 18.20-418.60 kg∙hm-2, with an average value of 131.11 kg∙ hm-2. The residual amount of plastic film was affected by the age of the plastic film mulching, crop type, recovery, soil texture, and other factors, among which the contribution rate of plastic film mulching age was the highest. With the increasing age of plastic film mulching, the residual amount of plastic film increased significantly, and the residual amount of plastic film in plots covered for more than 20 years was significantly higher than that in plots covered for less than 20 years (P<0.05) . The residual amount of plastic film in maize planting areas (132.77 kg∙hm-2) was higher than that in sunflower planting areas (127.88 kg∙hm-2) . Awareness of plastic film recovery was an important factor affecting the residual amount of plastic film in Hetao irrigation area. Recovery methods mainly include manual picking or raking out of farmland. The recovery rate of plastic film in the study area was only 38.10%, and the residual amount of plastic film recycled plots (108.28 kg∙hm-2) was significantly lower than that of non-recycled plots (145.03 kg∙hm-2) . Under the same conditions, the amount of residual film in sandy loam soil with different texture was the highest (153.84 kg∙hm-2) . The investigation results show that Hetao irrigation area can adjust planting structure, strengthen recycling awareness and recycling methods, popularize biodegradable plastic film to reduce plastic film pollution. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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