Responses of Soil Organic Carbon to Long-Term Understory Removal in Subtropical Cinnamomum camphora Stands

Table 3

Comparison of SOC content in different stands (mean ± SD, 𝑛 = 30).

	Soil layer
	0–10 cm	10–20 cm	20–30 cm	30–40 cm	40–50 cm	50–60 cm
UR (g·kg^−1)	26.08±3.79^a	16.56±3.01^a	13.42±1.40	12.38±1.36	11.32±2.02	11.52±2.26
CK (g·kg^−1)	36.24±3.71^b	25.14±3.79^b	18.84±3.93	15.84±4.96	13.49±4.27	12.10±4.20
Difference relative to CK (%)	28.04	34.13	28.77	21.84	16.09	4.79
Annual variation (g·kg^−1·y^−1)	−0.21	−0.18	−0.11	−0.07	−0.05	−0.01

Values within the same column with different lowercase letters are significantly different at 𝑃<0.05.