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为了定量描述重庆山地血橙园土壤粒径分形维数特征,本试验以重庆山地血橙园内血橙-红薯、血橙-花生、血橙-玉米、血橙纯林、血橙-茄子5种模式下的土壤为研究对象,通过野外调查及室内分析试验,测定了不同模式土壤的粒径分布及理化性质,计算了分形维数,探讨了分形维数与土壤粒径分布及理化性质的关系,结果表明:血橙园不同模式下土壤质地可分为砂质粘壤土和壤质粘土两类,分形维数与土壤质地具有很好的一致性;土壤砂粒与分形维数达到显著相关(p<0.05),土壤粘粒含量与分形维数达到极显著相关(p<0.01),分形维数大小首先决定于粘粒含量、其次为砂粒含量和粉粒含量;分形维数与土壤容质量、毛管孔隙度呈正相关,与土壤pH值呈极显著正相关(p<0.01),与非毛管孔隙度、总孔隙度、有机质、全氮、全磷、全钾含量呈负相关.土壤分形维数能客观表征血橙园土壤粒径分布,反映土壤肥力特征.
In order to quantitatively describe the characteristics of soil particle size fractal dimension of blooming orange orchard in Chongqing, blood orange-sweet potato, blood orange-peanut, blood orange-corn, blood orange- The soil under different soil types was selected as the research object. Through field investigation and laboratory analysis, the particle size distribution and physicochemical properties of different soil types were determined. The fractal dimension was calculated. The fractal dimension, soil particle size distribution and physicochemical properties The results showed that soil texture in the different modes of blood orange garden could be divided into sandy clay loam and loamy clay. The fractal dimension was in good agreement with soil texture. The correlation between soil sand and fractal dimension was significant (p <0.01). The fractal dimension was first determined by clay content, followed by sand content and grain content. The fractal dimension and soil bulk density (P <0.01), and was negatively correlated with the content of non-capillary porosity, total porosity, organic matter, total nitrogen, total phosphorus and total potassium, and that of soil fractal dimension Number can objectively characterize Orange Orange Garden soil Soil particle size distribution, reflecting the characteristics of soil fertility.