Effects of Different Land Use Types on Soil Particle Distribution and Fractal Dimension in Plain Afforestation Area of Beijing
In order to study the effects of different land use types on soil particle composition,the soil particles of five different land use types were selected,including farmland,abandoned grassland,artifi-cial arbor forest,artificial shrub forest and secondary forest.The particle size of soil samples was meas-ured by Microtrac S3500 laser particle sizer,and fractal characteristics were analyzed by using soil fractal theory and method.The results revealed that there were significant differences in soil particle size among different land use types,in which abandoned grassland was dominated by sand,while farmland,artificial arbor forest,artificial shrub forest and secondary forest was dominated by silt;the clay volume fraction of secondary forest and artificial arbor forest was the highest,which was significantly higher than that of oth-er land use types,and the abandoned grassland was the lowest;the silt volume fraction of secondary for-est,artificial arbor forest and artificial shrub forest was the highest,which was significantly higher than that of farmland and abandoned grassland;the sand volume fraction was opposite to the silt volume frac-tion;the order of soil fractal dimension from high to low was abandoned grassland<farmland<artificial shrub forest<secondary forest<artificial arbor forest;soil fractal dimension was significantly positively correlated with soil clay content and silt content,but significantly negatively correlated with soil sand content.
land use typesoil particle sizefractal dimensionvolume fraction
NETL
NSTL
万方数据
维普
