Soil associations and soil mapping units (including their clay and silt contents) in Thuringia, Saxony-Anhalt and Saxony (according to the revised FAO Legend (1990))

The Table shows the areas that the six soil associations and their assigned soil mapping units cover in the investigated regions of the three German Federal States of Thuringia, Saxony-Anhalt and Saxony. The table also includes information about the clay and silt contents of these soils, which is necessary for the assessment of the soil organic matter (Franko et al., 2011). This high degree of soil information is necessary because it allows a spatial differentiation in the landscape (not all soil associations are homogeneous) - which is important with regard to the designation of hot spots of high carbon demand. Large parts of the arable land in the study area are located on loess sediments. Soils in loess areas – where also chernosems can be found - cover 31.9% of the study area. All of these soils show high clay and silt contents, reaching from over 50 to 90%. The regional pattern of soil texture has been taken from the German soil map (BUEK1000; scale 1:1,000,000; Hartwich et al., 1998), which includes 72 soil mapping units in total. The mapping units are summarized to seven soil associations. This is a genetic-oriented approach, where the soils are grouped due to their different parent material and conditions relevant for soil formation (topography, climate, etc.) in the corresponding landscape.<br>49 of these 72 different soil mapping units can be found in our study area. Each soil unit has been assigned a characteristic soil profile (“Leitprofil”) where soil texture was derived by using the guidelines for soil mapping (Eckelmann et al., 2005). References: Eckelmann. W., Sponagel, H., Grottenthaler, W., Hartmann, K.-J., Hartwich, R., Janetzko, P., Joisten, H., Kühn, D., Sabel, K.-J., Traidl, R. (2005): Bodenkundliche Kartieranleitung. 5. verbesserte und erweiterte Auflage, Schweizerbart'sche Verlagsbuchhandlung, Stuttgart. Franko, U., Kolbe, H., Thiel, E., Ließ, E. (2011): Multi-site validation of a soil organic matter model for arable fields based on generally available input data. Geoderma 166, 119-134. Hartwich, R., Behrens, J., Eckelmann, W., Haase, G., Richter, A., Roeschmann, G., Schmidt, R. (1998): Bodenübersichtskarte der Bundesrepublik Deutschland. Bundesanstalt für Geologie und Rohstoffe, Hannover.本表格展示了德国三个联邦州——图林根州、萨克森-安哈尔特州与萨克森州——调查区域内，6个土壤群系（soil association）及其对应土壤制图单元（soil mapping unit）的覆盖范围。本表格同时包含这些土壤的黏粒与粉粒含量数据，该数据是评估土壤有机质（Franko等，2011）的必要参数。 此类高精度土壤信息的必要性在于，其可实现景观的空间差异化区分（并非所有土壤群系均为均质体），这对于划定高碳需求热点区域至关重要。 研究区域内的大片耕地分布于黄土沉积物之上。黄土区域（亦可发育黑钙土（chernozem））的土壤面积占研究区总面积的31.9%，此类土壤均具有较高的黏粒与粉粒含量，占比介于50%至90%之间。 本研究的土壤质地（soil texture）区域分布数据源自德国土壤图（BUEK1000；比例尺1:1000000；Hartwich等，1998），该图集总计包含72个土壤制图单元（soil mapping unit）。这些制图单元被归纳为7个土壤群系（soil association），该分类方法属于发生学导向的分类体系，依据对应景观内不同的成土母质与成土相关条件（地形、气候等）对土壤进行分组。 72个制图单元中有49个分布于本研究区域内。每个土壤单元均对应特征土壤剖面（"Leitprofil"），其土壤质地数据依据土壤制图指南（Eckelmann等，2005）获取。 参考文献： Eckelmann, W., Sponagel, H., Grottenthaler, W., Hartmann, K.-J., Hartwich, R., Janetzko, P., Joisten, H., Kühn, D., Sabel, K.-J., Traidl, R. (2005): 土壤制图指南（Bodenkundliche Kartieranleitung）。第5次修订扩充版，斯图加特施魏策尔巴特出版社。 Franko, U., Kolbe, H., Thiel, E., Ließ, E. (2011): 基于通用输入数据的耕地土壤有机质模型多站点验证。《Geoderma》166，119-134。 Hartwich, R., Behrens, J., Eckelmann, W., Haase, G., Richter, A., Roeschmann, G., Schmidt, R. (1998): 德意志联邦共和国土壤概图（Bodenübersichtskarte der Bundesrepublik Deutschland）。联邦地质与原材料研究所，汉诺威。