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选取位于新疆伊犁塔克尔莫乎尔沙漠中部的可克达拉剖面作为研究对象,分析了该剖面不同深度土壤有机碳和碳酸钙的组成变化。该剖面的土壤有机碳含量变化范围为1.02g/kg～4.97g/kg,平均值2.52g/kg,标准偏差1.04g/kg,变异系数41.3%;碳酸钙含量变化范围为8.71%～15.99%,平均值13.44%,标准偏差1.94%,变异系数14.4%。整个剖面有机碳的含量较碳酸钙的含量有较大的变化,二者随剖面深度变化的总体趋势比较相似,但仍有较大差异。对有机碳和碳酸钙含量进行相关性分析,通过了0.01极显著水平的检验,呈正相关,相关系数R2=0.498。结合两种物质在剖面不同深度的含量变化,探讨了它们所对应的环境信息;结果表明有机碳、碳酸钙含量变化可以作为分析沙漠古环境的有效代用指标。
The Keke Dala section located in the central part of the Taklimakul Desert in Ili, Xinjiang was selected as the research object, and the composition changes of soil organic carbon and calcium carbonate at different depths of the section were analyzed. The soil organic carbon content in the section varied from 1.02g / kg to 4.97g / kg with an average of 2.52g / kg with a standard deviation of 1.04g / kg and a coefficient of variation of 41.3%. The content of calcium carbonate varied from 8.71% to 15.99% , Average 13.44%, standard deviation 1.94%, coefficient of variation 14.4%. The content of organic carbon in the whole section has a larger change than the content of calcium carbonate. The overall trends of the two sections vary with the depth of section, but there is still a big difference. Correlation analysis of organic carbon and calcium carbonate content, through a 0.01 significant level of test, was positively correlated, the correlation coefficient R2 = 0.498. Combined with the changes of the contents of the two substances at different depths of the profiles, the environmental information corresponding to them was discussed. The results showed that the changes of organic carbon and calcium carbonate could be used as effective proxy indicators for the analysis of desert paleoenvironment.