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,和铜的泄率用大型单体溶解仪确定
Matthias Wiggenhauser1, David Illmer1, Ernst Spiess2
1Institute of Agricultural Sciences, ETH Zurich, Eschikon 33, CH-8315 Lindau, Switzerland.
The Science of the total environment
|March 12, 2024
概括
从土壤中出微量金属受到天气的影响,而不是受肥. 单体溶解仪精确测量了,铜和的泄,显示出比以前建模的更低的速率.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 农业生态系统分析分析
背景情况:
- 土壤质量平衡对于评估来自肥料的微量金属风险至关重要.
- 精确测量微量金属漏率是必不可少的,但具有挑战性.
研究的目的:
- 使用单质溶解仪精确确定 (Cd),铜 (Cu) 和 (Zn) 出率.
- 评估气候和受精对微量金属出的影响.
- 为了将测量的浸出率与现有模型和化肥输入进行比较.
主要方法:
- 使用大型单体溶解仪 (n=12),具有坎比索土壤类型和独特的作物系统.
- 应用稳定同位素追踪剂来追踪微量金属从土壤表面直接转移到漏水中的情况.
- 在不同的气候条件下,收集了两年 (2021-2022) 的数据.
主要成果:
- 每年的水率各不相同:Cd (0.040.30),Cu (2.6511.7),Zn (7.2739.0 g/ha-1年-1年) 等.
- 在潮年相比于干旱年,漏水率明显高,这表明气候影响.
- 施肥策略的影响很小;泄漏率远低于施肥投入.
- 同位素追踪显示,在两年内,金属从土壤表面直接转移到漏水中很少 (<0.07%).
- 欧盟现有的Cd漏模型似乎高估了通过漏水产生的土壤产量.
结论:
- 单质溶解仪提供准确的微量金属漏数据,这对于完善土壤质量平衡评估至关重要.
- 气候,特别是大雨,对微量金属的出有很大的影响,比施肥方法更重要.
- 测量的漏率表明,一些模型之前估计的肥料引入的微量金属的风险比以前更低.
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