Productivity and Elemental/Chlorophyll Composition of Collard Greens in an Aquaponic System at Different Combinations of Media and Black Soldier Fly (Hermetia illucens) Larvae Frass Supplementations

Table 5

Mean (±SE) composition of elements (mg/kg on “as is basis”) in collard greens aquaponically grown with or without media and with or without black soldier fly (Hermetia illucens) frass after 10 weeks.

	No media/no frass	No media frass	Media/no frass	Media/frass	SEM	Media	Frass	Interaction
Phosphorus	192.3	173.8	147.0	167.0	10.9	0.045	0.944	0.117
Sodium	15325.7	12171.5	10909.6	9486.3	1315.6	0.059	0.194	0.606
Calcium	2639.9	2353.7	2576.0	2363.8	275.2	0.932	0.435	0.906
Sulfur	53.3	37.7	33.5	32.3	5.2	0.062	0.188	0.254
Iron	90.9	44.8	1080.0	178.2	45.0	0.857	0.278	0.395
Manganese	93.3	445.6	122.2	457.1	86.9	0.861	0.016	0.940
Zinc	1530.6	498.1	443.2	594.3	168.8	0.034	0.021	0.009
Strontium	763.1	659.8	549.9	676.8	90.8	0.321	0.902	0.250
Aluminum	382.8	295.1	283.6	292.0	27.5	0.144	0.244	0.167

bold font indicates significant differences.