Published in Scientific Papers. Series "Journal of Young Scientist", Vol. 7
Written by Manuela ROTARU, Luima MANUEL, Aurelian IOAN, Dan SÎRBU
The study was designed to investigate the effect of the two systems (aquaponic and hydroponic) on lettuce yield and quality. The experiment was conducted within the laboratory C01 Environmental Sciences, FIFIM. The two systems were monitored weekly through the following parameters: pH, CE, NH4, NO2, NO3, KH, PO4 using colorimetric kits named, JBL test. Regarding the growth and development of the lettuce, the length of the lettuce was measured every three days. In addition to measuring the growth of the leaves, the lettuce was also analyzed in the form of dry substance. As a result, it was proved that at pH values were generally between 6.5-8.4 pH and CE between 1.37-1.43 dS / m-1. For the aquaponic tank, the concentration of nitrates decreased from 240mg / l to 60mg / l and phosphates at 3.6 - 2.0 mg / l. This results in a good absorption of the roots of the lettuce plant. In comparison to the hydroponic system, where the concentration of nitrates and phosphates was higher. in the hydroponic system, the lettuce had an average growth of two cm every three days, and in the aquaponic system it had an average growth of three cm every three days.
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