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Table 3 Analysis of the variance of the effects of different treatments, soil layers, and time after organic mulching on soil organic carbon fractions in the rhizosphere and bulk soil

From: Organic mulching promotes soil organic carbon accumulation to deep soil layer in an urban plantation forest

  df Soil organic carbon Dissolved organic carbon Easily-oxidised organic carbon Microbial biomass carbon
Bulk Soil Rhizosphere Bulk Soil Rhizosphere Bulk Soil Rhizosphere Bulk Soil Rhizosphere
Time 2 9.73*** 10.69*** 114.48*** 82.63*** 7.28** 1.41 96.71*** 136.83***
Soil layer 1 10.40** 4.49* 25.49*** 13.59*** 83.73*** 74.29*** 29.61*** 17.31***
Treatment 3 0.48 0.15 5.06** 4.12* 1.27 0.83 0.30 0.37
Time × Soil layer 2 5.99** 3.01 0.55 0.09 0.75 1.65 0.04 2.67
Time ×Treatment 6 1.02 0.86 0.92 2.11 2.94* 1.74 0.17 0.29
Soil layer × Treatment 3 0.97 0.62 1.78 0.87 3.62* 0.20 2.22 1.18
Time × Soil layer × Treatment 6 1.08 0.44 0.98 0.89 0.73 0.60 1.36 0.66
  1. Note: * P < 0.05; ** P < 0.01; *** P < 0.001