赣南地区南方红壤粒度与磁化率特征研究  

Study on Grain Size and Magnetic Susceptibility of South Red Soil in Southern Jiangxi Province

作　　者：李红琼 韩荣培 Li Hongqiong;Han Rongpei(School of Geography and Environmental Science,Guizhou Normal University,Guiyang,Guizhou 550025,China;Guizhou Institute of Nationalities,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州师范大学地理与环境科学学院,贵州贵阳550025 [2]贵州省民族研究院,贵州贵阳550025

出　　处：《绿色科技》2020年第20期34-38,共5页Journal of Green Science and Technology

摘　　要：以赣南红壤剖面土为研究对象,分别测了定其粒度和磁化率,探究了该地区土壤粒度和磁化率关系,以期为关于气候变化、土壤侵蚀、环境污染等相关方面的研究提供基本参考。对一定间距连续进行剖面采样取样所得的43个样品总数,采用Mastersize2000激光粒度仪和卡帕桥多频各向异性磁化率仪(MFK1-FA)两种仪器进行了实验,在实验数据基础上运用偏度、峰度、磁化率等方法进行了定量分析与评价,结果表明:剖面土以粉砂质地为主具有分选性差,偏度为正偏并属于窄峰态特点;剖面土壤磁化率与深度呈正相关变化,其磁化率值介于23.560×10^-8~87.615×10^-8 m^3/kg之间,波动变化范围较小且随深度增加不断增大。通过对比分析,得出了以下基本结论:①剖面磁化率主要受控于砂岩母质成分及其岩性变化,且随深度增加而递增;②频率磁化率和质量磁化率与粉砂含量、平均粒径、峰度呈负相关关系;与砂粒含量、中值粒径、标准差呈正相关关系;③细颗粒物对磁化率影响不大。Taking the soil of the red soil as the research object,the grain size and magnetic susceptibility were measured respectively,and the relationship between soil particle size and magnetic susceptibility was explored in order to provide a basic reference for the research on climate change,soil erosion and environmental pollution.The total number of 43 samples obtained by continuous sampling at a certain interval was tested by Mastersize2000 laser particle size analyzer and Kappa bridge multi-frequency anisotropic magnetic susceptibility meter(MFK1-FA).The skewness was applied based on the experimental data.Quantitative analysis and evaluation of methods such as kurtosis and magnetic susceptibility.The results show that the profile soil is dominated by silt texture,and the classification is poor.The skewness is positively biased and belongs to the narrow peak state.The soil magnetic susceptibility and depth of the profile are positively correlated,and the magnetic susceptibility value is between 23.560×10^-8.Between^87.615×10^-8 m^3/kg,the fluctuation range is small and increases with depth.Through comparative analysis,the following basic conclusions are drawn:①The magnetic susceptibility of the profile is mainly controlled by the composition of the parent material of the sandstone and its lithology,and increases with the increase of depth;②the frequency magnetic susceptibility and the mass magnetic susceptibility are both the silt content and the average grain.The diameter and kurtosis are inversely correlated,and positively correlated with silt content,median diameter and standard deviation;③fine particles have little effect on magnetic susceptibility.

关 键 词：红壤 粒度 磁化率 相关性 赣南 

分 类 号：S151.9[农业科学—土壤学]