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在研究黄土剖面中有机物质（含微生物）与黄土层磁化率关系时，发现黄土层，特别是所夹古土壤层中存在含磁小体的趋磁细菌，古土壤层中趋磁细菌及磁小体含量均高于相邻的黄土层。磁小体形成和铁源关系测试结果揭示了趋磁细菌的生长与有机盐有关，较低浓度的有机铁更有利于趋磁
When studying the relationship between the organic matter (including microorganisms) and the susceptibility of loess layer in the loess section, it is found that there are magnetotactic magnetotactic bacteria in the loess layer, especially in the clayey soil layer, magnetotactic bacteria and magnetism in the paleosol layer Body contents are higher than the adjacent loess layer. The results of the relationship between magnetosome formation and iron source reveal that the growth of magnetotactic bacteria is related to organic salts. The lower concentration of organic iron is more conducive to magnetism