Suitable Density of Morning Glory together with the Nile Tilapia Culture in an Aquaponics System

Abstract

The objectives of this research were (1) to design and develop growing beds for an aquaponics system together with fish tanks in PVC pipes and (2) to study the suitable number of morning glory plants in the aquaponics system that cultured Nile tilapia, which consisted of three main parts: 1) The growing tables were made of box steel, sized 0.80x1.50x0.80 m, 2) The growing beds were made of        2-inch blue PVC pipe, and 3) The 120-liter black plastic fish tank, with 30 fish per tank, together with 1, 2, 3, and 4 plants of morning glory/a growing pot, a completely randomized design (CRD) trial was conducted, with three repetitions each. Regarding the analysis of the morning glory production efficiency, the results showed that the Nile tilapia cultivation in a growing pot of two morning glory plants trended to increase height and had the Average Daily Gain (ADG) of the morning glory at 35.81 cm and 1.19 g/plant/day, respectively. Meanwhile, in the analysis of the Nile tilapia production efficiency, the results revealed that four plants per growing pot of morning glory trended to increase weight gain, and the AGDs of the Nile tilapia were at 13.30 g and 0.44 g/day, respectively. Moreover, one and four plants in a growing pot had the highest survival rates of the Nile tilapia, at 79.05% and 79.05%, respectively. The feed conversion ratio of the Nile tilapia was the least at 1.25 for four plants in a growing pot of morning glory, which had no statistically significant differences from other experiments.