Skip to main content

Table 2 Effects of crop residue incorporation and K fertilization on soil WSOC/SOC ratio (%)

From: Comparative effects of crop residue incorporation and inorganic potassium fertilization on soil C and N characteristics and microbial activities in cotton field

TreatmentNanjingDafeng
SSFSBSBOSSSFSBSBOS
Control0.36 ± 0.02b0.50 ± 0.02ab0.58 ± 0.01c0.35 ± 0.01c0.32 ± 0.02c0.50 ± 0.02ab0.53 ± 0.02c0.39 ± 0.02c
W0C10.39 ± 0.02b0.47 ± 0.02bc0.63 ± 0.03bc0.37 ± 0.02c0.35 ± 0.03bc0.47 ± 0.02b0.55 ± 0.02bc0.42 ± 0.01bc
W1C00.38 ± 0.00b0.49 ± 0.02b0.65 ± 0.03b0.43 ± 0.03b0.36 ± 0.02b0.47 ± 0.03b0.60 ± 0.03b0.45 ± 0.03b
W1C10.42 ± 0.01a0.54 ± 0.03a0.77 ± 0.03a0.49 ± 0.02a0.41 ± 0.02a0.53 ± 0.02a0.69 ± 0.04a0.51 ± 0.02a
K1500.37 ± 0.01b0.46 ± 0.02bc0.61 ± 0.04bc0.37 ± 0.01c0.33 ± 0.01bc0.48 ± 0.03b0.57 ± 0.02bc0.42 ± 0.02bc
K3000.37 ± 0.01b0.44 ± 0.02c0.62 ± 0.02bc0.38 ± 0.02c0.33 ± 0.02bc0.47 ± 0.03b0.56 ± 0.02bc0.41 ± 0.02bc
F value5.87**6.27**17.55**19.60**8.89**3.12*12.25**13.56**
  1. WSOC, water-soluble organic carbon content; SOC, soil organic carbon; SS, seedling stage; FS, flowering stage; BS, boll-setting stage; BOS, boll-opening stage. Control, neither crop residue nor K fertilizer; W1C0, 0.9 t·ha−1 wheat straw incorporation alone, W0C1, 0.7 t·ha− 1 cotton straw incorporation alone; W1C1, 0.9 t·ha− 1 wheat straw incorporation + 0.7 t·ha− 1 cotton straw incorporation; K150, 150 kg·ha− 1of K2O; K300, 300 kg·ha− 1 of K2O
  2. F values and significance levels (**P < 0.01, *P < 0.05)