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Table 5 Effects of crop residue incorporation and K fertilization on soil MBN/TN 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
Control6.00 ± 0.29a7.76 ± 0.39a10.78 ± 0.69a7.23 ± 0.07a6.67 ± 0.30a7.78 ± 0.45ab10.22 ± 0.22ab8.34 ± 0.57a
W0C15.63 ± 0.19a8.09 ± 0.30a10.65 ± 0.90a7.51 ± 0.21a6.57 ± 0.34a8.04 ± 0.36a10.52 ± 0.20a8.47 ± 0.48a
W1C05.63 ± 0.24a6.44 ± 0.29b8.95 ± 0.14b6.75 ± 0.15b6.30 ± 0.15a7.26 ± 0.23bc9.22 ± 0.40c8.22 ± 0.49a
W1C15.72 ± 0.24a6.45 ± 0.14b9.98 ± 0.26ab7.52 ± 0.19a6.52 ± 0.16a7.01 ± 0.36c9.67 ± 0.41bc8.30 ± 0.05a
K1505.96 ± 0.25a7.82 ± 0.05a10.80 ± 0.63a7.28 ± 0.34a6.78 ± 0.33a7.77 ± 0.17ab10.28 ± 0.58ab8.62 ± 0.32a
K3006.00 ± 0.28a7.76 ± 0.45a10.84 ± 0.63a7.23 ± 0.23a6.71 ± 0.16a8.01 ± 0.44a10.45 ± 0.47a8.45 ± 0.30a
F value1.6317.71**4.65*5.55**1.394.44*4.85*0.38
  1. MBN, microbial biomass nitrogen; TN, total 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, *P < 0.05)