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中文摘要：
用激光衍射法（LD法）和吸管法实测了60个富铁土土样的颗粒粒径分布（PSD）数据，在此基础上分别计算了颗粒的质量分形维数Dm和体积分形维数Dv。结果发现：由于LD法“低估”了黏粒部分，因此Dv相对低于Dm；由于D。和Dm之间呈现出了一定的正相关性（P〈0．001），且Dv与其实测黏粒之间呈一定的正相关性，因此Dv在一定程度上也能够用于表征土壤的某些基本属性；LD法可以对粒径进行更多的分级，但不同的粒径分级会对Dv产生影响，对粒径的再细分会导致Dv略微降低。
英文摘要：
Laser diffraction （LD） technique and pipette method were used to measure particle size distributions （PSD） of 60 ferrosol samples. Based on the measurements, mass fractal dimension, Dm, and volume fractal dimension, Dv, were calculated and compared. Results show that Dv is lower than Dm because the laser diffraction technique ＂underestimated＂ the clay fraction compared to the pipette method. As significant linear correlations were observed between Dvand Dm as well as between Dvand its measured clay fraction, Dv could also be used to characterize some basic soil properties. The LD method could divide soil particle size into more classes with distinctive Dv value. Further division of particle size classes might lead to slight decrease in Dv.
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