Summary of the effects of fertilizer-phosphorus (P) source on season-long methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) emissions, and total global warming potential (GWP) and CO2-excluded GWP using the IPCC sixth (IPCC, 2021) assessment conversion factors during 2023 in the greenhouse.

Table 5: Summary of the effects of fertilizer-phosphorus (P) source on season-long methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) emissions, and total global warming potential (GWP) and CO2-excluded GWP using the IPCC sixth (IPCC, 2021) assessment conversion factors during 2023 in the greenhouse.

Greenhouse gas property	P	Fertilizer-P source					Overall mean
Greenhouse gas property	P	ECST_Real^a	ECST_Syn^a	CPST^a	MAP^a	UC^a	Overall mean
Season-long Emissions
CH₄ (kg ha^-1)	0.28	0.65	0.26	0.88	0.47	0.67	0.59
N₂O (kg ha^-1)	< 0.01	1.9 b^*	1.6 b	2.2 b	1.8 b	6.1 a	-
CO₂ (Mg ha^-1)	0.01	23.0 a	22.0 a	22.0 a	23.3 a	13.6 b	-
Total GWP (kg CO₂-equivalents ha^-1 season^-1)
	0.02	23487 a	22458 a	22655 a	23819 a	15215 b	-
CO₂-excluded GWP (kg CO₂-equivalents ha^-1 season^-1)
	< 0.01	530.3 b	425.1 b	608.7 b	488.0 b	1622.7 a	-

^a Electrochemically precipitated struvite made from a synthetic solution, ECST_Syn; electrochemically precipitated struvite made from a real wastewater, ECST_Real; chemically precipitated struvite, CPST; monoammonium phosphate, MAP; unamended control, UC

^* Means followed by a letter with the same case do not differ (P > 0.05)