Differences of SOC storage and stability between soil layers influenced by long-term fertilization in a typical paddy soil of Southern China

Chemical and Biological Technologies in Agriculture

Table 2 Carbon input and SOC storages of 0–60 cm soil depth in different treatments

Treatment	C_input-root (t C ha⁻¹ year⁻¹)	C_{input-stubble} (t C ha⁻¹ year⁻¹)	C_{input-organic fert} (t C ha⁻¹ year⁻¹)	C_input-total (t C ha⁻¹ year⁻¹)	SOC storage (t C ha⁻¹)	ACR_soc (t C ha⁻¹ year⁻¹)
CK	2.13 ± 0.47 c	0.15 ± 0.05 c	——	2.29 ± 0.52 d	69.9 ± 2.08 b	0.126 ± 0.072 b
NPK	2.44 ± 0.55 bc	0.24 ± 0.08 b	——	2.68 ± 0.63 c	70.2 ± 0.33 b	0.134 ± 0.012 b
2NPK	2.88 ± 0.68 a	0.29 ± 0.11 a	——	3.17 ± 0.78 b	72.4 ± 1.21 ab	0.212 ± 0.042 ab
NPKM	2.75 ± 0.71 ab	0.28 ± 0.12 ab	3.48	6.51 ± 0.82 a	75.2 ± 3.85 a	0.307 ± 0.133 a

Different lowercase letters indicate significant differences among treatments, p < 0.05