红壤及其同源红壤性水稻土各粒级磁化率分布规律的研究

The Magnetic Susceptibility Distribution of Particle Fractions from Red Earthes and Corresponding Submerged Paddy Soils

红壤经水耕熟化作用后各粒级磁化率大幅度下降，粒级间磁化率差异变小，分布曲线趋于平缓。母质对各粒级磁化率的分布曲线的形状影响颇大。铁子、假砂和铁质岩屑之含量决定着粗砂粒级（０．

This paper dealing with the magnetic susceptibility distribution of particle fractions from three red earthes and three corresponding submerged paddy soils. After the three red earthes were ploughed for growing rice, the magnetic susceptibility of particle fractions decreased greatly and the magnetic susceptibility curve went smoothly. The patterns of parent material had great effect on the shape of magnetic susceptibility curve.The contents of ferric Particle, pseudosand and ferruginous rock debris determined the magnetic susceptibility of coarse sand fraction.