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不同土地用途下的土壤的抗氧化能力来源

Irmina Ćwieląg-Piasecka¹, Jacek Łyczko², Elżbieta Jamroz³

¹Institute of Soil Science, Plant Nutrition and Environmental Protection, Wroclaw University of Environmental and Life Sciences, Grunwaldzka 53 St., 50-357, Wroclaw, Poland. irmina.cwielag-piasecka@upwr.edu.pl.

Scientific reports

|April 10, 2024

概括

土壤抗氧化剂 (AOX) 对土壤健康至关重要,但土地使用会影响土壤的抗氧化水平. 森林土壤表现出最高的抗氧化能力和含量,主要来自酸,影响土壤质量.

科学领域:

土壤科学土壤科学
环境化学环境化学
生物地质化学生物地质化学

背景情况:

来自植物代谢物的抗氧化剂 (AOX) 对土壤的氧化还原过程和质量至关重要.
关于土地利用对土壤抗氧化剂积累的影响的了解有限.
土壤有机物成分和抗氧化剂水平是土壤健康的关键指标.

研究的目的:

量化抗氧化剂含量和能力在不同的土地用途的地平线:废弃的地,耕地和林地土壤.
评估酸对抗氧化剂总能力 (TAC) 的贡献.
确定特定的化合物及其在各种土地管理实践下的分布.

主要方法:

在各种土壤提取物中使用Folin-Ciocâlteu方法评估的总抗氧化能力 (TAC).
酸对TAC的贡献量化.
通过气相色谱-质谱法 (GC-MS) 确定的抗氧化剂概况.

主要成果:

森林土壤表现出最高的 TAC (15.5 mg g−1) 和 AOX 含量 (4.34 mg g−1),与土壤有机碳正相关.
胺酸占土壤总抗氧化能力的50%以上.
主要的化合物因土地用途而有所不同:森林中的异黄和p-基酸 (p-HA);沉地中的 esculetin 和 p-HA;在耕地中丰富的 p-HA.

结论:

土地使用显著影响土壤抗氧化剂水平和成分,森林土壤是最丰富的.
湿性物质是土壤抗氧化能力的主要贡献者.
需要进一步的研究来阐明形有机物在土壤氧化还原过程中的作用.

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