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Table 1 Chemical properties of long-term fertilizer treatments

From: Influence of long-term fertilization on soil microbial biomass, dehydrogenase activity, and bacterial and fungal community structure in a brown soil of northeast China

Treatment pH (H2O) TN (g kg−1) SOC (g kg−1) TP (g kg−1) TK (g kg−1) AP (mg kg−1) AK (mg kg−1) AHN (mg kg−1)
NP 5.32 ± 0.07 d 1.60 ± 0.01 d 11.04 ± 0.08 f 0.51 ± 0.005 c 13.50 ± 0.07 f 31.34 ± 0.50 e 85.09 ± 1.17 f 138.40 ± 2.51 e
NPK 5.17 ± 0.13 e 1.74 ± 0.06 c 10.96 ± 0.15 f 0.53 ± 0.002 c 13.34 ± 0.10 g 29.49 ± 1.16 e 88.48 ± 2.03 e 151.37 ± 2.17 d
N 5.30 ± 0.10 d 1.63 ± 0.03 d 11.47 ± 0.17 e 0.30 ± 0.003 d 13.73 ± 0.09 e 2.28 ± 0.30 f 86.44 ± 1.02 ef 137.09 ± 5.26 e
C 5.95 ± 0.13 c 1.55 ± 0.03 e 9.93 ± 0.06 g 0.31 ± 0.005 d 13.39 ± 0.03 fg 0.90 ± 0.11 f 96.59 ± 1.07 d 113.29 ± 2.27 f
MNP 6.23 ± 0.08 ab 1.86 ± 0.03 b 16.19 ± 0.16 c 0.87 ± 0.037 a 14.51 ± 0.09 b 172.16 ± 6.08 a 122.99 ± 2.11 b 193.73 ± 0.90 a
MNPK 6.12 ± 0.12 b 1.97 ± 0.02 a 17.63 ± 0.10 a 0.85 ± 0.031 a 14.79 ± 0.05 a 162.94 ± 2.97 b 137.21 ± 1.01 a 163.15 ± 3.05 c
MN 6.23 ± 0.07 ab 1.92 ± 0.03 ab 14.98 ± 0.02 d 0.76 ± 0.027 b 14.08 ± 0.04 c 140.80 ± 2.18 c 105.74 ± 2.68 c 179.09 ± 8.41 b
M 6.42 ± 0.09 a 1.99 ± 0.09 a 16.45 ± 0.13 b 0.54 ± 0.001 c 13.86 ± 0.10 d 126.97 ± 1.14 d 103.03 ± 2.11 c 149.23 ± 0.36 d
  1. The mean value ± standard deviation (n = 4)
  2. TN total N, SOC soil organic C, TP total P, TK total K, AP available P, AK available K, AHN alkali-hydrolyzable N
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