Period

Experimental treatments

Bacterial biomass (×10⁸ cells∙g⁻¹)

${\text{NH}}_4^{\text{+}}$ oxidation activity (point)

${\text{NO}}_2^{-}$ oxidation activity (point)

N circulation activity (point)

P circulation activity (point)

September 2019

Before cultivation

0.3 ± 0.2^zb^y

51.3 ± 12.5b

66.0 ± 6.5b

13.3 ± 5.4b

0.7 ± 0.9b

May 2020

Organic

16.1 ± 4.1a

72.0 ± 2.1a

83.3 ± 5.1a

67.8 ± 4.7a

4.5 ± 0.9a

Chemical

n.d.c

58.0 ± 4.5ab

55.0 ± 4.8b

10.6 ± 0.5b

0.0 ± 0.0c