Experimental treatments

Bacterial biomass (×10⁸ cells g⁻¹)

NH+ 4 oxidation activity (point)

NO− 2 oxidation activity (point)

N circulation activity (point)

P circulation activity (point)

Organic fertilizer

18.6 ± 4.54^z

**

^y

60.8 ± 28.5

n.s.

69.5 ± 23.1

*

55.8 ± 11.2

**

15.0 ± 1.7

**

Chemical fertilizer

n.d

83.0 ± 17.6

32.3 ± 1.5

8.8 ± 1.6

n.d