游离氧化铁对土壤粒径分布特征的影响  

Effects of Free Iron Oxide on Particle Size Distribution of Soil

作　　者：刘艳秋[1] 黄成敏[1] 赵赫[1] 

机构地区：[1]四川大学建筑与环境学院,成都610065

出　　处：《湖北农业科学》2015年第8期1840-1844,共5页Hubei Agricultural Sciences

基　　金：国家科技支撑计划项目(2012BAC06B02);国家自然科学基金项目(41371225)

摘　　要：选取游离氧化铁含量为6．14—46．14g／kg的土壤样品，研究了游离氧化铁去除对土壤粒径分布特征的影响。结果表明，游离氧化铁含量小于27．4g／kg时，是否去除游离氧化铁不影响土壤粒径分布；而当游离氧化铁含量大于27．4g/kg时，表征土壤颗粒分布的各项指标在去除游离氧化铁后有了很大变化，表明游离氧化铁对于土壤粒径分析的影响已不可忽略。因此，游离氧化铁含量大于27．4g／kg的土壤在进行土壤粒径分析时．需考虑去除游离氧化铁。Soils with 6.14-46.14 g/kg free iron oxide were chosen for study to explore the efffect of free iron oxide on soil particle size distribution. The results indicated that the removal of free iron oxide had no effect on soil particle size distribution in case of low free iron oxide content（〈27.4 g/kg）.When the free iron oxide content was greater than 27.4 g/kg,however, the parameters of soil particle size distribution changed greatly after the free iron oxide removal, showing that the impact of the removal of free iron oxide on soil particle size distribution could not be ignored. It is concluded that free iron oxides should be removed from the soil in case of the content is higher than 27.4 g/kg for soil particle size distribution analysis.

关 键 词：游离氧化铁 分散 粒径分析 

分 类 号：S152.3[农业科学—土壤学]