Effects of Different Improvement Measures on Particle Composition and Fractal Characteristics of Sandy Soil

【Objective】 The objective of this work is to study the texture changes of sandy soil under different improvement measures with the view of providing scientific theoretical basis for the improvement of sandy soil in Southern Xinjiang. 【Methods】 Five different improvement measures were applied to the sandy soils of southern Xinjiang, namely, planting oats (A₁), planting rape + oats (A₂), planting oats + rape straw tillage + biofertilizer (A₃), planting oats + agrofertilizer (A₄), planting oats + agrofertilizer + biofertilizer (A₅), and the effect of the five different improvement measures on the sandy soils was analyzed through the field tests. 【Results】 The results showed that the fractal dimension D values of the soil under different improvement measures ranged from 2.35 to 2.49. As the soil layer deepened, the fractal dimension values of fine particulate matter in the soil tended to increase compared to the control. The fractal dimension D of soil particles was positively correlated with clay particles and with fine powder particles, and negatively correlated with sand particles. 【Conclusion】 Comprehensive analysis showed that the combination of farm manure or green manure with biological bacteria fertilizer can effectively improve the physical and chemical properties of the sandy soil.