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因为在有关土层制图单元和景观图斑内容的土壤调查说明中,相似土壤和相异土壤的现行定义存在局限性.所以,我们设计了一种描述土壤差异的新方法。根据土壤的本质属性的不同,定义了6级(或水平)土壤差异。根据土壤质地、粗碎屑、生根深度、排水性、透水性、pH、盐溃度、坡度、侵蚀相和受淹情况,为土壤比较确定12个参数,将每一参数的取值范围划分为几个离散的等级以便比较,差异等级分为很相似、相似、稍微不同、不同或很不相同。对于一个给定的参数(如表层质地),差异等级的确定取决于属性值是否处于同一等级、相邻等级、附近等级或疏远等级内,对每一参数重复应用此种方法,对被比较的两种土壤可得到12个差异参数,差异水平中差异的分布决定着两种土壤的总差异程度,在一、二个参数的差异比其它任何参数大的情况下,这一、二个参数的差异水平就成为土壤的总差异程度,在几种参数都在同一水平上变化的情况下,多属性变异的累积影响则通过提高总差异程度到离一级差异水平来表达,新模型的优点包括:多等级,根据土壤属性定义土壤差异,方法精确,由任何两人重复测试同一组数据都可得到相同的结论。
Because of the limitations of the current definition of similar and dissimilar soils in soil survey descriptions of soil mapping units and landscape patches, we have devised a new method to describe soil differences. Depending on the nature of the soil, a 6th (or horizontal) soil difference is defined. According to the soil texture, coarse debris, rooting depth, drainage, water permeability, pH, salinity, salt gradient, slope, erosion phase and flooded conditions, 12 parameters were determined for soil comparison. The range of each parameter was divided into There are several discrete levels for comparison, and the level of difference is very similar, similar, slightly different, different or very different. For a given parameter (such as surface texture), the level of discrepancy is determined by whether the attribute value is within the same level, adjacent level, nearby level, or alienated level, applying this method to each parameter repeatedly, Twelve different parameters can be obtained in the two soils. The distribution of the differences in the differences determines the total degree of difference between the two soils. When the difference between one or two parameters is larger than any other, the two parameters The level of difference becomes the total degree of soil difference. When several parameters all change at the same level, the cumulative effect of multiple attribute variability is expressed by increasing the degree of total variance to a level different from the first level. The advantages of the new model include : Multilevel, soil differences are defined based on soil properties and the method is accurate. The same conclusion can be drawn from any two people testing the same set of data repeatedly.