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绿洲化进程加剧导致绿洲边缘土地覆被状况发生变化,为探讨绿洲边缘不同土地利用方式对土壤属性及土壤质量的影响,以塔里木盆地南缘策勒绿洲边缘人为垦殖的棉田、果园、沙拐枣林地及自然状态下骆驼刺覆被样地等4种土地利用方式为研究对象,利用土壤质量相对指数(RI)及土壤质量综合指数(SQI)分别探讨各样地间在0～20 cm、20～40 cm、40～60 cm内土壤质量变化状况;同时利用分形理论对各样地表层土壤的粒径分布(PSD)属性进行分析.结果表明,土壤有机质及总氮指标在各样地间均存在显著性差异;各样地每层土壤的RI及SQI排序相同,棉田及果园利用方式对0～20 cm的土壤质量有明显促进作用;但随着土壤深度增加,自然覆被骆驼刺样地土壤质量逐渐高于其余样地;而对自然植被进行替代的沙拐枣林地,其各层土壤指标及土壤质量均处于最低水平,表层土壤PSD分形维数分析也表明沙拐枣林地保持土壤细粒成分能力最差.
In order to explore the influence of different land use patterns on soil properties and soil quality at the edge of oasis, the cotton fields, orchards and Calligonum mongolicatum cultivated on the edge of Cele Oasis in the southern margin of Tarim Basin were changed. The land use types of four kinds of land such as alpine larvae, forest land and natural alpine meadow were studied. The soil quality index (RI) and soil quality index (SQI) ~ 40 cm and 40 ~ 60 cm, respectively.At the same time, the fractal theory was used to analyze the properties of soil particle size distribution (PSD) of various soils.The results showed that soil organic matter There was a significant difference among them. The RI and SQI rankings of soils in each plot were the same. The cotton field and orchard ways promoted the soil quality at 0 ~ 20 cm. However, with the increase of soil depth, Soil quality gradually higher than the rest of the plots; and for the natural vegetation replacement jujube woodland, its various soil indicators and soil quality indicators are at the lowest level, the surface soil PSD fractal dimension Analysis also Table Sha Shui zaolin ability to keep the soil particle component worst.