A Comparison of Three Different Hydroponic Sub-systems (gravel bed, floating and nutrient film technique) in an Aquaponic Test System

摘要: Murray Cod, Maccullochella peelii (Mitchell), and Green Oak lettuce, Lactuca sativa, were used to test for differences between three hydroponic subsystems, Gravel Bed, Floating Raft Nutrient Film Technique (NFT), in a freshwater Aquaponic system, where plant nutrients supplied from fish wastes while plants stripped the waste water before it was returned fish. The Cod had FCR's biomass gains that statistically identical all systems. Lettuce yields good, terms of gain yield, followed relationship bed > NFT, with significant seen treatments. NFT treatment significantly less efficient than other two treatments nitrate removal (20% efficient), whilst no difference any phosphate removal. In dissolved oxygen, replacement conductivity, observed Overall, results suggest sub-systems are at both removing culture producing or yield an context. system designers need take these into account when designing components within aquaponic