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

Table 4

Comparison of soil carbon storage in different stands (mean ± SD, 𝑛 = 30).

	Soil layer						Total
	0–10 cm	10–20 cm	20–30 cm	30–40 cm	40–50 cm	50–60 cm
UR (t·hm^−2)	25.56±3.72^A	15.07±2.74^a	12.88±1.34	13.99±1.53	12.23±2.18	11.86±2.33	91.59^a
CK (t·hm^−2)	40.95±4.19^B	26.65±4.01^b	18.09±3.78	18.06±5.65	13.62±4.31	12.10±4.20	129.47^b
Difference relative to CK (%)	37.58	43.45	28.80	22.54	10.21	1.98	29.26
Annual variation (t·hm^−2·y^−1)	−0.32	−0.24	−0.11	−0.08	−0.03	−0.01	−0.79

Values within the same column with different lowercase letters are significantly different at 𝑃<0.05.
Values within the same column with different uppercase letters are significantly different at 𝑃<0.01.