Microbial carbon use efficiency and soil carbon storage

The sample sites were located along a north-to-south transect spanning Chongqing, Guizhou, and Guangxi provinces (21°84′–29°11′ N, 106°93′–108°75′ E) in southwest China. Six distinct areas with varying climatic gradients were carefully chosen along this transect. Sampling sites were specifically established within secondary forests situated on carbonate rocks (karst) and clastic rocks (non-karst) within each designated area. This dataset primarily focuses on soil organic carbon-related data while encompassing comprehensive information on climate, vegetation, soil physicochemical properties, microbiology, and more.