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为了定量侵蚀引起的土壤流失程度,建立了一个新的x射线光谱法。按顶土厚度,或者粘粒含量最大层顶,或者粘化层顶估计的方法对加速侵蚀引起的土壤流失量的估计偏低.被测的每一土壤有一特殊的质量吸收系数(μM)线,并可按土壤深度绘制成曲线。当土壤被侵蚀时,质量吸收系数线就发生变化。最大μM值反映了高原子质量元素包括铁(Fe)和盐基等风化产物的聚积.对所有被测的单个土体,最大μM亚层的下界与粘化层下界相一致。最大μM值位于最大粘粒含量和离子交换量(CEC)层以下1或2亚层。当粘粒含量最大层的一部分由于耕作混入顶土时,最大粘粒含量层的深度的改变导致对侵蚀量估计偏低。与轻度侵蚀的单个土体(对照)比较,粘化层和最大μM亚层下界的变化是侵蚀单个土体土壤流失量的最好指标。由于它们在土壤剖面中分布深,因而这些参数比粘粒含量最大层稳定,不易被加速侵蚀移去。这种方法经具有粘化层的土壤试验,适用于具有粘化层的淋溶土、老成土和软土地区土壤侵蚀研究。
In order to quantify the degree of soil erosion caused by erosion, a new x-ray spectrometry was established. Estimates of soil erosion due to accelerated erosion are under-estimated for topsoil or maximally clay-containing tops, or top-of-clay estimates, and each soil tested has a special mass absorption coefficient (μM) line , And according to the depth of soil drawn into a curve. When the soil is eroded, the mass absorption coefficient line changes. The maximum μM value reflects the accumulation of high atomic mass elements including weathering products such as iron (Fe) and bases.For all tested individual soils, the lower bound of the maximum μM sublayer is consistent with the lower bound of the adhesive layer. The maximum μM value lies in the 1 or 2 sub-layers below the maximum clay content and ion exchange capacity (CEC) layer. When a part of the maximum layer of clay content is mixed into the top soil due to tillage, a change in the depth of the maximum clay content layer results in a low estimation of the amount of erosion. Changes in the lower bound of the mucilage layer and the maximum [mu] M sublayer are the best indicators of soil erosion loss of a single soil, compared to the lightly eroded individual soil (control). Because of their deep distribution in the soil profile, these parameters are more stable than the largest layer of clay and are not easily removed by accelerated erosion. This method is tested on soils with a sticky layer and is suitable for soil erosion studies in leaching soils with clayey soils, in older soils and in soft soils.