ZHANG Da-geng,LI Jie.Influence of Different Iron Oxides on Magnetic Susceptibility of Brown Earth Profile[J].Northern Horticulture,2014,38(04):144-148.
不同形态氧化铁对棕壤剖面磁化率的影响
- Title:
- Influence of Different Iron Oxides on Magnetic Susceptibility of Brown Earth Profile
- 文章编号:
- 1001-0009(2014)04-0144-05
- Keywords:
- iron oxides; brown soil profile; magnetic susceptibility
- 分类号:
- S 153
- 文献标志码:
- A
- 摘要:
- 以典型棕壤为研究对象，在分析棕壤剖面土壤磁化率及不同形态氧化铁分布特征的基础上，进一步探讨了不同形态氧化铁对棕壤剖面磁化率的影响。结果表明：棕壤剖面土壤磁化率变化趋势大致为表土磁化率最高，淋溶淀积引起土壤磁化率局部增大，在母质层土壤磁化率相对较低。棕壤剖面的频率磁化率的平均值为9.08%，说明土壤中含有大量的风化成土作用产生的超细顺磁颗粒。棕壤剖面磁化率与游离态铁、铁的游离度和络合态铁含量之间呈极显著的正相关，与无定形铁之间的相关性不显著；60～200 cm土层土壤磁化率与土壤全铁含量之间呈显著正相关。其中游离氧化铁含量是影响棕壤剖面磁化率分布的重要因素。
- Abstract:
- Taking brown soil as research object,through measurement and analysis of magnetic susceptibility of brown soil profile and morphologically different iron oxides，the influence of iron oxides with chemically different morphologies on magnetic susceptibility of brown soil were studied.The results showed that magnetic susceptibility changing trended of brown soil profile generally was that surface soil magnetic susceptibility was the highest，magnetic susceptibility of deposition layer was locally greatened，in the parent material layer soil susceptibility was relatively low.The average frequency magnetic susceptibility of brown soil was 9.08%，so brown soil contains a lot of ultrafine paramagnetic particle produced by weathering pedogenesis.Free iron oxides and amorphous iron oxides were highly significantly correlated with magnetic susceptibility；total iron was significantly correlated with magnetic susceptibility on 60～200 cm layer.In terms of magnetic susceptibility of brown soil，the content of free iron oxides had more influences than that of amorphous iron oxides and organic combination iron oxides.
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备注/Memo
第一作者简介：张大庚（1975-），女，博士，副教授，现主要从事土壤肥力和农业环境与生态等教学与科研工作。E-mail:zdg111@126.com.