剩余塑料薄膜通过对土壤物理化学性质和根生长的直接负面影响,降低了作物产量和用水效率
Xiaobo Gu1, Rui Yin1, Wenjing Cai1
1Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, Shaanxi Province, China.
The Science of the total environment
|June 24, 2024
概括
农田中的塑料覆盖物残留物通过降低土壤特性和阻碍根生长,严重损害作物产量和用水效率 (WUE). 减少皮膜积累对于可持续农业至关重要.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 薄膜覆盖对于干旱地区的作物生产至关重要.
- 积累的塑料土残留物对作物产量和用水效率 (WUE) 有负面影响.
- 了解剩余薄膜影响的机制对于可持续农业至关重要.
研究的目的:
- 综合分析残留膜对土壤特性,作物根生长,产量和WUE的影响.
- 阐明残余薄膜污染的影响机制.
- 为减轻残余薄膜污染提供理论基础.
主要方法:
- 现有研究的元分析.
- 系统评估剩余薄膜的影响.
- 结构方程建模以确定影响路径.
主要成果:
- 剩余薄膜改变了土壤的物理化学特性,增加了土壤散密度和表土湿度,同时减少了多孔性,有机物质和更深的土壤湿度.
- 农作物的根生长 (干重,长度,直径,体积,表面积) 显著减少.
- 农作物产量和WUE平均下降了13.46%和9.21%,对现金作物的影响更大.
结论:
- 剩余薄膜污染对作物产量和WUE构成重大威胁.
- 负面影响是通过土壤退化和根部发育受损的介导.
- 减少塑料积对于可持续的农业实践至关重要.
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