灌导致在典型的Se-toxicity区域内和周围出现新的Se-toxicity田
Yuanzhe Ma1, Fei Zhou1, Dasong Yu1
1College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.
The Science of the total environment
|May 28, 2023
概括
用高的河水灌农田,在22%的田中造成新的 (Se) 毒性. 这种由酸盐驱动的污染突显了需要在富含的地区仔细选择水源的必要性.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 农业科学 农业科学
背景情况:
- 农田中的过量 (Se) 仍然是一个环境问题,特别是在Se毒性地区.
- 农田利用显著影响的行为和土壤中的生物可用性.
研究的目的:
- 调查农田新污染的来源和机制.
- 评估用高河水灌对土壤的影响Se-毒性.
- 了解土壤特性在固定和可用性中的作用.
主要方法:
- 在典型的Se毒性地区进行了为期八年的现场监测和农田土壤调查.
- 在灌和自然水道上追踪了新的Se污染源.
- 分析了河水中占主导地位的Se物种及其与地质背景的关系.
- 研究了土壤有机物和无形铁对Se固定的影响.
主要成果:
- 22%的田显示,由于用高Se河水灌,表面土壤中的Se毒性增加.
- 在来自高Se地质区域的河流中,酸盐占主导性Se物种的90%.
- 土壤有机物和无形铁含量在固定输入方面发挥了关键作用.
- 可用Se在田增加了两倍以上,建议长期可持续的可用性.
结论:
- 高的河水灌是中国新农田Se毒性的重要原因.
- 土壤有机物和铁含量影响的固定和长期可用性.
- 在高地质地区,精心选择灌水是必不可少的,以防止进一步污染.
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