Nitrogen Release in Pristine and Drained Peat Profiles in Response to Water Table Fluctuations: A Mesocosm Experiment

Table 3

Contrasts between experimental groups for DON and NH₄⁺-N.

		PrCtrl versus DrCtrl	PrFluc versus DrFluc	PrCtrl versus PrFluc	DrCtrl versus DrFluc
DON	DF	16	16	16	16
	𝑡 value	2.95	0.58	3.51	0.04
	P value	0.0094	n.s.	0.0029	n.s.
NH4^+-N	DF	16	16	16	16
	𝑡 value	2.58	12.01	11.30	1.86
	P value	0.0201	<0.0001	<0.0001	n.s.

𝑁=5 for each group and phase, except for DON at phases 3 and 4 in DrCtrl, where 𝑛=4. Pr: pristine; Dr: drained; Ctrl: control; Fluc: fluctuating water table. n.s.: nonsignificant.