Fractal Dimension Characteristics of Soil Particle-Size Distribution in a Blood Orange Orchard of Chongqing
In order to quantitatively describe the fractal dimension characteristics of blood orange (Citrus sinensis) orchard in hilly area of Chongqing ,soil particle size distribution and physico‐chemical properties of the soil under 5 interplanting modes (blood orange‐sweet potato ,blood orange‐peanut ,blood orange‐maize and blood orange ,blood orange‐eggplant) were tested based on field investigation and laboratory a‐nalysis .The fractal dimensions were computed and the relationships between fractal dimension and soil physico‐chemical properties were discussed .The results indicated that soil texture of different types in blood orange orchard could be divided into two categories :sandy clay loam and loamy clay ,and fractal di‐mension had the same rule as soil texture .The contents of soil sand had negative relationship with fractal dimension while contents of soil clay had a significant positive relationship with fractal dimension (p <0.01) .Fractal dimension was first determined by the content of clay ,and then by the content of sand and silt .Fractal dimension had significant positive relationship with pH values (p<0.01) and had positive re‐lationship with soil bulk density and capillary porosity while negative relationship with non‐capillary poros‐ity ,total porosity ,soil organic carbon ,total nitrogen ,total phosphorus and total potassium .In conclu‐sion ,soil fractal dimension can objectively characterize blood orange orchard soil particle size distribution and reflect the characteristics of soil fertility .
soil particle-size distributionphysical and chemical propertiesfractal dimensionCitrus sinensis (L. ) Osbeckmountainous region
NETL
NSTL
万方数据
维普
