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Table 3 Effects of crop residue incorporation and K fertilization on soil MBC/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
Control2.95 ± 0.20b3.94 ± 0.13b4.96 ± 0.18b3.45 ± 0.17b3.47 ± 0.18b4.07 ± 0.11b4.77 ± 0.24b4.06 ± 0.20b
W0C13.01 ± 0.13b3.99 ± 0.25b5.02 ± 0.22b3.63 ± 0.14b3.68 ± 0.18ab4.31 ± 0.11a5.05 ± 0.14b4.09 ± 0.06b
W1C03.01 ± 0.15b4.08 ± 0.08ab5.02 ± 0.23b3.57 ± 0.16b3.52 ± 0.06b4.36 ± 0.10a4.87 ± 0.15b4.26 ± 0.08ab
W1C13.34 ± 0.20a4.36 ± 0.25a5.87 ± 0.25a4.15 ± 0.11a3.86 ± 0.11a4.49 ± 0.13a5.44 ± 0.11a4.49 ± 0.20a
K1503.01 ± 0.15b3.98 ± 0.15b5.04 ± 0.17b3.50 ± 0.17b3.57 ± 0.06b4.27 ± 0.11ab4.91 ± 0.18b4.20 ± 0.09b
K3003.03 ± 0.18b3.96 ± 0.20b5.10 ± 0.19b3.53 ± 0.13b3.56 ± 0.18b4.33 ± 0.14a4.90 ± 0.22b4.15 ± 0.08b
F value2.062.148.23**8.83**3.064.02*5.37**4.12*
  1. MBC, microbial biomass carbon; SOC, soil organic carbon; SS, seedling stage; FS, flowering stage; BS, boll-setting stage; BOS, boll-opening stage. Different treatments are defined in the Table 2
  2. F values and significance levels (**P < 0.01, *P < 0.05)