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

Table 2

Results of Proc mixed for DON, NH₄⁺-N, and NO₂⁻ + NO₃⁻-N.

		Experimental groups	Phases	Interaction
DON	Num DF	3	3	9
	Den DF	16	46	46
	𝐹 value	5.06	9.85	0.72
	P value	0.0118	<0.0001	n.s.
NH4^+-N	Num DF	3	3	9
	Den DF	16	16	16
	𝐹 value	79.20	0.25	1.37
	P value	<0.0001	n.s.	n.s.
NO2^− + NO3^−-N	Num DF	3	3	9
	Den DF	16	48	48
	𝐹 value	2.78	2.02	1.92
	𝑃 value	n.s.	n.s.	n.s.

The results present the fixed effects of experimental groups (PrCtrl, PrFluc, DrCtrl, and DrFluc), phases (1, 2, 3, and 4), and interaction of the experimental groups and phases. 𝑁=5 for each experimental group and each phase, except for DON at phases 3 and 4 in DrCtrl, where 𝑛=4. n.s.: nonsignificant.