Table 3 Relative abundance of phylogenetic order under the Phylum of Proteobacteria at each experimental site (relative abundance > 1%)

Rhizobiales

1.86^b

5.74^a

5.83^a

6.22^a

5.16^a

4.95^a

4.97^a

5.32^a

4.82^a

5.82^a

Myxococcales

2.16^b

4.45^a

5.84^a

5.53^a

3.97^a

4.08^a

4.40^a

4.65^a

4.43^a

4.81^a

Sphingomonadales

0.98^c

5.58^ab

6.84^a

5.07^ab

4.64^b

3.72^b

4.54^b

4.50^b

4.27^b

3.74^b

Xanthomonadales

1.34^d

5.48^b

7.19^a

4.68^bc

3.16^c

2.98^cd

3.86^bc

3.38^c

4.43^bc

3.48^c

Burkholderiales

1.74^e

4.87^a

3.98^abc

4.27^ab

3.12^bcd

2.04^de

2.15^de

3.02^cd

1.38^e

1.68^e

Rhodospirillales

0.77^c

2.71^b

2.77^b

3.03^b

3.64^ab

3.28^ab

3.44^ab

3.51^ab

3.41^ab

4.37^a