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中文摘要：
基于Mastersizer2000激光粒度仪测定的土壤颗粒体积分布信息,研究了杨凌地区土壤粒径分布体积分形维数与土壤基本物理特性之间的关系,建立了该地区土壤粒径分布体积分形维数的估算函数。结果表明,杨凌地区0～20cm和20～40cm土层土壤粒径分布体积分形维数的平均值分别为2.649 1和2.626 2;0～20cm和20～40cm土层土壤粒径分布体积分形维数都与粘粒质量分数的相关性最为显著,与砂粒质量分数的相关性次之;建立的估算函数预测精度较高,其中0～20cm和20～40cm土层土壤粒径分布体积分形维数预测值的相对误差分别介于-0.298%～0.726%和-0.179%～0.772%之间。
英文摘要：
Based on soil particle volume distribution,the paper studied relationship between volume fractal dimension of soil particle-size distribution and soil physical properties,and established its estimation function.The results showed that average values of volume fractal dimension of soil particle-size distribution in 0~20 cm and 20~40 cm soil layers were respectively 2.649 1 and 2.626 2 in Yangling;correlation between volume fractal dimension of soil particle-size distribution in 0~20 cm and 20~40 cm soil layers and clay content was most significant,and correlation between them and sand content took second place;relative error of forecasted volume fractal dimension of soil particle-size distribution in 0~20 cm soil layers was between-0.298% and 0.726%,the one in 0~20 cm soil layers was from-0.179% to 0.772%,which illustrated that forecasting precision of established model was very high.
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