Chronosequence of soil degradation and wind erosion and in the semi-arid Kulunda steppe in Western Siberia

半干旱草原地区的农用土壤尤其受到侵蚀过程的威胁。一个例子是调查地区，西西伯利亚东南部的库伦达草原。关于半干旱草原地区风蚀和土壤退化的知识很少，特别是西伯利亚草原地区。许多研究调查了土壤有机质的损失，但只有少数研究还考虑了风蚀对养分供应的影响。拟议的短期项目侧重于风蚀对库伦达草原表层土壤的影响和土壤质量的变化，主要目的是量化侵蚀沉积物、有机和矿物土壤成分。利用土壤学和地球化学方法（主要是粒度分布和元素分析），以137Cs浓度为年代学标志，将保护区土壤表层土与农田表层土进行了比较。研究结果将作为一项完整提案的基础，在该提案中，将使用其他方法沿着气候梯度调查风蚀的影响。

The agriculturally used soils in semi-arid steppe regions are especially threatened by erosion processes. An example is the investigation area, the Kulunda steppe in the south-eastern part of Western Siberia. Knowledge concerning wind erosion and soil degradation in the semi-arid steppe areas is scarce, especially for the steppe areas in Siberia. Many studies investigated losses of soil organic matter, but only few considered also the effect of wind erosion on nutrient availability. The proposed short project focuses on the effects of wind erosion on topsoil horizons and changes in soil quality in the Kulunda steppe, a main aim will be to quantify the eroded sediments, the organic and mineral soil components. The buried topsoils of soils in protected areas at the edges of the fields are compared with topsoils of cropped fields using pedological and geochemical methods (mainly particle size distribution and elemental analysis), and using 137Cs concentrations as chronological marker. The results will be the base for a full proposal in which the effects of wind erosion would be investigated using additional methods along a climatic gradient.