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Table 6 Effects of crop residue incorporation and K fertilization on soil MBC/MBN ratio

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

Treatment

Nanjing

Dafeng

SS

FS

BS

BOS

SS

FS

BS

BOS

Control

5.46 ± 0.21b

5.65 ± 0.20b

5.11 ± 0.25b

5.30 ± 0.21ab

5.60 ± 0.27c

5.55 ± 0.25b

5.03 ± 0.27c

5.24 ± 0.23a

W0C1

5.95 ± 0.18a

5.51 ± 0.27b

5.26 ± 0.24b

5.39 ± 0.23ab

6.05 ± 0.28ab

5.79 ± 0.29b

5.17 ± 0.19bc

5.22 ± 0.25a

W1C0

5.62 ± 0.11b

6.65 ± 0.35a

5.87 ± 0.19a

5.56 ± 0.20ab

5.85 ± 0.21abc

6.30 ± 0.32a

5.53 ± 0.22ab

5.43 ± 0.22a

W1C1

6.06 ± 0.16a

7.02 ± 0.31a

6.09 ± 0.14a

5.73 ± 0.26a

6.11 ± 0.16a

6.61 ± 0.20a

5.81 ± 0.21a

5.58 ± 0.22a

K150

5.51 ± 0.19b

5.55 ± 0.23b

5.10 ± 0.26b

5.26 ± 0.20b

5.63 ± 0.22bc

5.87 ± 0.15b

5.10 ± 0.29c

5.20 ± 0.24a

K300

5.52 ± 0.18b

5.58 ± 0.12b

5.14 ± 0.22b

5.33 ± 0.21ab

5.70 ± 0.19abc

5.81 ± 0.14b

5.04 ± 0.14c

5.27 ± 0.21a

F value

6.55**

20.34**

11.79**

2.03

2.76

8.14**

6.15**

1.25

  1. MBC, microbial biomass carbon; MBN, microbial biomass nitrogen; 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)