河南省表层土壤全碳与有机碳地球化学背景值研究.

Based on the results of the 1 ∶ 250 000 regional geochemical survey projects completed in Henan Province from 2003 to 2020, the geochemical background values of total carbon and organic carbon in surface soil in Henan Province were systematically studied. The results showed that there were significant differences in the geochemical background values of total carbon and organic carbon in the surface soil of Henan Province in different administrative regions, watersheds and soils with different parent materials. The overall spatial distribution of the total carbon background value of surface soil in administrative regions showed that it was higher in the western mountainous areas and lower in the eastern plains, higher in the northern alkaline soil areas and lower in the southern acidic soil areas; the distribution of river basins decreased in sequence from the Haihe River Basin to the Yellow River Basin, then to the Huaihe River Basin, and finally to the Yangtze River Basin; the total carbon background value of soil developed from residual and residual slope deposits, river alluvial deposits, alluvial deposits, aeolian deposits, loess and red soil, and river lake sediments gradually decreases. The background values of surface soil organic carbon in administrative regions were generally higher in mountainous areas and lower in plains, and there were significant differences in the background values of surface soil organic carbon in different watersheds;the background value of soil organic carbon developed from residual and residual slope deposits, alluvial deposits, river lake sediments, loess and red soil, river alluvial deposits, and aeolian deposits gradually decreased. [ABSTRACT FROM AUTHOR]