中文摘要：

为了探明盐分对土壤孔隙特征及分形特征的影响,采用CT（computed tomography）扫描技术获取了6个盐分处理（ECe：S1=8.52 d S/m,S2=21.89 d S/m,S3=24.78 d S/m,S4=25.71 d S/m,S5=26.36 d S/m,S6=33.26 d S/m）的土壤分层剖面图像,并结合Image J软件提取分析了土壤孔隙数目、孔隙面积等参数在土壤剖面上的分布特征,同时,采用杨培岭模型计算了土壤分形维数。结果表明：盐分影响土壤孔隙结构的形成和分布,具体而言,从S1到S6,随着盐分的增加,土壤孔隙度先减小后增加,S1盐分处理（ECe=8.52 d S/m）的孔隙度明显大于其他盐分处理,并且,S1盐分处理的孔隙度波动也大于其余5个盐分处理,S4（ECe=25.71 d S/m）盐分处理的孔隙度最小;此外,土壤孔隙数也表现为先减少后增加的趋势,S4（ECe=25.71 d S/m）总孔隙数最少（481）。在本次土样深度分析范围（6.3~44.1 mm）内,土壤孔隙结构随深度并无明显的关系。土壤分形维数计算结果表明,盐分影响土壤的分形维数,随着盐分的增加,分形维数先减小后增大,S4最小（2.58）,同盐分对土壤孔隙的影响规律一致,进一步说明盐分影响土壤的物理性质,同时壤土（S1和S6）的分形维数大于粉质壤土（S2~S5）,说明土壤质地变细,分形维数有增大的趋势。同时,和其他获取土壤孔隙结构特征的方法相比,CT结合Image J的方法可以快速准确地获取土壤孔隙的大小、数目等几何参数,处理过程方便快捷,操作简单,更能批量处理。

英文摘要：

To find out the influence of salts on the soil pore characteristics and fractal feature, CT （computed tomography） scanning technology was used for the six salt treatments （ECe： S1 = 8.52 dS/m, S2 = 21.89 dS/m, S3 = 24.78 dS/m, S4 = 25.71 dS/m,S5 = 26.36 dS/m,S6 = 33.26 dS/m）. Soil profile images, combined with ImageJ software extraction of the soil parameters such as pore number, pore size distribution on soil profile were analyzed, with using Yang-model to compute soil fractal dimension. Results show that Ihe sah affects the formation and distribution of soil pore structure, in particular, from S1 to S6, with the increase of salinity, soil porosity increasc after decrease first, soil porosity of S1 salt treatment （ECe = 8.52 dS/m） is significantly greater than other salt treatments, the same time, the soil porosity volatility of S1 salt treatment is greater than the rest of the five salt treatments, S4 （ECe = 25.71 dS/m） salt treatment with the minimal porosity; In addition, the soil pore numbers also show a trend of increase the first, the total pore number of S4 （ECe = 25.71 dS/m） is minimum（481）. In the depth of the soil sample analysis within the range （6.3 to 44.1 mm）, soil pore structure and has no obvious relation with depth. Soil fractal dimension calculation results show that the soil salt influences fraetal dimension, with the increase of salinity, fractal dimension, and increase with the decrease of the first, and S4 has the minimum （2.58） , which is the same as soil porosity, further illustrate salt affects the physical properties of soil, loam （S1 and S6） of the fractal dimension is greater than the sihy loam （S2-S5 ）, shows that the soil texture and fractal dimension has a tendency to increase. Besides, compared with other access methods of soil pore structure characteristics, CT combined with ImageJ method can quickly and accurately obtain the soil pore size, number, geometric parameters, such as process convenient and quick, easy operation, better batch p