The aim of present study is to compare the roots - leaf nitrite and nitrate level of
Nores spinach (Spinacia oleracea), grown in an aquaponic system along with
rainbow trout (Onchorhynchus mykiss), under three plant densities (V1 - 59
plants/m2, V2 – 48 plants/m2 and V3 – 39 plants/m2). The second objective is to
compare the results obtained for the spinach grown in the integrated rainbow trout
– spinach aquaponic system to those of marketable spinach, grown under
conventional condition, in the field.