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<p>Environmental magnetism, with its advantages of speed, sensitivity, cost-effectiveness, and harmlessness, has extensive applications in various fields such as environmental science, climate research, and soil science. However, studies on the magnetism of agricultural are limited. This study conducted magnetic investigations on 21 agricultural soil profiles (including farmland and tea plantations) and 6 adjacent natural soil profiles (forestland) in the southwestern subtropical region of China. By analyzing and comparing the soil magnetic characteristics of natural soil and agricultural soil profiles and using the structural equation model, the influencing factors of soil magnetism in different soil layers (0–70 cm and 70–140 cm) were determined. This study revealed that soil magnetic susceptibility is influenced by soil organic carbon (SOC), drainage conditions, and weathering intensity. In the 0–70&#xa0;cm soil layer, SOC and drainage conditions were the primary factors affecting soil magnetism. The differences in soil drainage conditions result in variations in dry–wet cycling patterns, which, along with the influence of SOC on the formation and transformation of magnetic minerals in redox alternations, affects soil magnetic susceptibility. In the 70–140&#xa0;cm soil layer, weathering intensity was the primary factor influencing soil magnetism. The magnetic susceptibility of surface soil can indirectly reflect the soil organic carbon content and drainage effect, so as to judge the soil fertility and health status. The change of deep magnetic susceptibility can be used as a potential indicator of soil weathering degree to guide deep soil improvement. Through the monitoring of surface and deep soil magnetic susceptibility, it provides a low-cost, non-destructive soil health monitoring method for agricultural practice.</p>

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Magnetic properties of agricultural soils and their relationships with environmental factors in Jinghong, Yunnan, China

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Meichen Wang,
  • Haixia Li,
  • Shiyu Li,
  • Yudong Chen,
  • Gangqiang Li

摘要

Environmental magnetism, with its advantages of speed, sensitivity, cost-effectiveness, and harmlessness, has extensive applications in various fields such as environmental science, climate research, and soil science. However, studies on the magnetism of agricultural are limited. This study conducted magnetic investigations on 21 agricultural soil profiles (including farmland and tea plantations) and 6 adjacent natural soil profiles (forestland) in the southwestern subtropical region of China. By analyzing and comparing the soil magnetic characteristics of natural soil and agricultural soil profiles and using the structural equation model, the influencing factors of soil magnetism in different soil layers (0–70 cm and 70–140 cm) were determined. This study revealed that soil magnetic susceptibility is influenced by soil organic carbon (SOC), drainage conditions, and weathering intensity. In the 0–70 cm soil layer, SOC and drainage conditions were the primary factors affecting soil magnetism. The differences in soil drainage conditions result in variations in dry–wet cycling patterns, which, along with the influence of SOC on the formation and transformation of magnetic minerals in redox alternations, affects soil magnetic susceptibility. In the 70–140 cm soil layer, weathering intensity was the primary factor influencing soil magnetism. The magnetic susceptibility of surface soil can indirectly reflect the soil organic carbon content and drainage effect, so as to judge the soil fertility and health status. The change of deep magnetic susceptibility can be used as a potential indicator of soil weathering degree to guide deep soil improvement. Through the monitoring of surface and deep soil magnetic susceptibility, it provides a low-cost, non-destructive soil health monitoring method for agricultural practice.