Water use efficiency in aquaponic

The experiment was implemented in Minya Governorate, at N 30°47'51" and E 30°28'12'', during the period from June to December 2023. The experiment was designed using (NFT) Nutrient Film Technique. The study included four variables; the first treatment (T1) is the use of water produced from fish tank to the planting unit. Second treatment (T2) is the use of water produced from fish tank to mechanical filter to the planting unit. Third treatment (T3) the use of water produced from fish tank to biological filter for the planting unit. Pepper seedlings were grown in tube, the length of the cultivation tube 3m, the distance between plants 25 cm. A separate fish tank was also added as the fourth treatment (T4). At every treatment, was measured (dissolved oxygen, Water temperature, TDS, PH, ammonia (NH3-N), WUE). Results indicated that the water use efficiency compared to (T1, T2, and T3) (2.76, 3.23, and 4.38) Kg/m3, respectively. However, the highest water use efficiency was used (T3) and the lowest (T1). where (T3) was higher than (T1) by up to 57.7%, and higher than (T2) by up to 20.23%. production of catfish in (T1, T2, and T3) 8.838 kg/m3, Compared with (T4), where the production value of animal protein for catfish is 2.096 kg/m3. saving water in (T1, T2, and T3) Compared with (T4) 321%. At the end of the experiment, the ammonia (NH3-N) percentage in average ammonia in (T1, T2, and T3) Compared with (T4) reached (3.99 and 9.99) ppm, respectively.