铁石和红泥障碍物,以减少土壤的地下移动
Samantha Smith1, Lewis Gaston1, Jeffery Beasley2
1School of Plant, Environmental and Soil Sciences, LSU Agricultural Center, Baton Rouge, Louisiana, USA.
Journal of environmental quality
|July 24, 2024
概括
生性铁石和红色泥土显示出减轻水中的损失的潜力. 红色的泥,特别是低pH值的泥,在土壤修改中表现出优异的保留和增强植物生长.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 水质管理水质管理
背景情况:
- (P) 通过漏的损失有助于优化.
- 透反应屏障 (PRB) 是减轻营养损失的潜在解决方案.
- 铁石和红泥 (石精炼残留物) 被研究为P剂.
研究的目的:
- 在PRB中评估小动物性铁石和未经处理的红泥作为P吸收剂.
- 评估它们对P吸收,运输,液压导电性和植物生长的影响.
主要方法:
- 批量和列实验被用来研究P吸收和运输.
- 和液压导电性 (KS) 被测量.
- 温室实验评估了对普通百慕大草 (Cynodon dactylon) 生长的影响.
主要成果:
- 铁石和红泥都表现出高的P吸附最大值 (∼30 mmol P kg-1),超过了P丰富的土壤.
- 红泥的P吸收随着pH值的下降而显著增加.
- 当红色泥与pH值较低的土壤混合时,与铁石 (13%) 相比,红色泥显示出更高的P保留率 (76%).
- 红泥添加 (≥5%) 降低了和液压导电性,而铁石 (高达20%) 没有.
- 用红色泥土修补土壤增强了百慕大草的生长和P吸收.
结论:
- 红色泥显示出高的P吸收能力和增强植物生长的潜力.
- 它在PRB中的适用性取决于对液压导电性及其在酸性土壤中的潜在长期中和的影响的管理.
- 低的合并率或与粗材料的共同合并可能会优化PRB中红泥的使用,以减轻.
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