Application of Combustion Module Coupled with Cavity Ring-Down Spectroscopy for Simultaneous Measurement of SOC and δ¹³C-SOC

Table 1

Site information.

Site	Location	MAT (°C)	MAP (mm)	Planted (years)	Vegetation	Soil type	Soil texture	C3 to C4 vegetation switch
Shenyang	42.7°N 125.1°E	5.2	1518	1961	Zea mays L.	Aquic brown soil	Sandy loam	15 years
Haerbin	45.6°N 126.6°E	3.1	530	1988	Zea mays L.	Terra nera	Sandy loam	23 years
Guigang	22.9°N 109.5°E	22.0	653	1956	Saccharum officinarum L.	Laterite	Clay loam	55 years

MAP: mean annual precipitation; MAT: mean annual temperature.