Table 1.

Experimental treatments.

Treatment	Abbreviation	Treatment
		${\text{NH}}_{\text{4}}^{+}$ addition*	Inhibitor (μmol g−1)
Positive control	CK-N	+	0
Negative control	CK-0	−	0
PHENYLHYDRAZINE (PH)
Low	PH-L	+	1
Medium	PH-M	+	10
High	PH-H	+	100
METHYLHYDRAZINE (MH)
Low	MH-L	+	1
Medium	MH-M	+	10
High	MH-H	+	100
2-HYDROXYETHYLHYDRAZINE (HH)
Low	HH-L	+	1
Medium	HH-M	+	10
High	HH-H	+	100

* The final concentration of ammonium was 1.4 mg ${\text{NH}}_{\text{4}}^{+}-\text{N}{\text{g}}^{-\text{1}}$ soil in ${\text{NH}}_{\text{4}}^{+}$-amended microcosms.