土壤的差异 Cd 米的固定和阻塞 Cd 由作物残留物和骨头获得的生物炭的吸收 - 一个为期2年的实地实验
Zhongjun Xue1, Fengfeng Sui2, Yanjie Qi1
1Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China.
Ecotoxicology and environmental safety
|December 14, 2024
概括
不同的生物炭有效地降低了米粒和土壤中的 (Cd). 骨炭 (BOC) 显示出优异的Cd固定,而大麻草生物炭 (REB) 和大米生物炭 (RHB) 增强了土壤Cd固定和减少了植物吸收.
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:
- 土中的 (Cd) 污染对大米安全构成风险.
- 生物炭修正案因其有可能固定土壤Cd.的潜力而得到认可.
- 生物炭特性和元素组成的变化会影响Cd在土壤-大米系统中的转移.
研究的目的:
- 评估不同生物炭 (大麻草生物炭 - REB,大米生物炭 - RHB,骨炭 - BOC) 在固定土壤Cd和减少大米Cd吸收方面的有效性.
- 调查生物炭元素组成和特性对Cd转化和在土中的生物利用性的影响.
主要方法:
- 在Cd污染的土中进行了为期两年的实地试验.
- REB,RHB和BOC在15t ha-1.1时被应用.
- 分析了谷物和土壤中的Cd度,以及土壤中的Cd分数和化学特性.
主要成果:
- 所有生物炭处理都显著降低了谷物Cd度.
- 骨炭 (BOC) 最有效地降低了CaCl2可提取的Cd,与土壤Ca增加和溶解的P相关.
- 草生物炭 (REB) 在IP分数中增强了Cd固定,这与较高的硫含量和电子捐赠能力有关.
- 皮生物炭 (RHB) 减少了Cd从根部转移到芽部的转移,可能是由于根中的含量较高.
结论:
- 生物炭的元素组成和特性对于土壤Cd固定和缓解大米中Cd积累至关重要.
- BOC在降低Cd生物可用性方面表现出色,而REB和RHB则为Cd固定和减少植物吸收提供了不同的机制.
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