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Table 2 The effects of soil type, season, and fertilization treatment on the changes of alpha diversity of bacterial, fungal, and protist communities based on linear mixed model (LMM)

From: Protist communities are more sensitive to nitrogen fertilization than other microorganisms in diverse agricultural soils

Alpha diversity   Fertilization Soil type Season Fertilization × soil type Fertilization × season Soil type × season Fertilization × soil type × season
Bacterial community F 4.473 98.300 2.188 0.757 0.327 0.242 0.754
P 0.065 < 0.001 0.150 0.561 0.724 0.787 0.563
Fungal community F 7.056 117.140 0.0305 0.565 0.367 1.220 2.942
P 0.027 < 0.001 0.862 0.690 0.696 0.309 0.037
Protist community F 13.163 10.253 142.357 1.536 0.218 5.969 1.475
P 0.006 < 0.001 < 0.001 0.217 0.805 0.007 0.235
  1. With the plot position serial number (i _ j, where i and j are the row and column number of the plot, respectively) in the field as a random effect