The effect of liquid organic plant supplements on aquaponic culture of red cabbage (Brassica oleraceae L. var. Capitata f. rubra DC.) and tilapia (Oreochromis niloticus L.)

Abstract

Abstrak. Aquaponic cultivation is an innovation in the fulfillment of fish and vegetable food needs. The types of fish and vegetables that have not been widely cultivated in aquaponics are tilapia and red cabbage. The aims of this experiment is to provides information on the best concentration of plant liquid organic suplements for the maintenance of red cabbage and tilapia in this aquaponic system. These are commodity have a variety of advantages and high production so it is necessary to conduct an aquaponic assessment of tilapia and red cabbage using liquid organic supplements of plants. This research was conducted gradually, namely the preparation of red cabbage seeds and fish seeds, fermentation of water, acclimatition of fish and research treatment. The research design uses a completely randomized design with four treatments and five replays. The treatment used by giving of liquid organic supplement concentrations merk SOC plants that differ in the integrated aquaponic tarpaulin pond system is treatment1 (0 ml/l), treatment2 (2.5 ml/l), treatment3 (5 ml/l) and treatment4 (7.5 ml/l) with each pond as much as 25 fish/pond. Aquaponic watering technique using DFT (Deep Flow Technique). Variables of red cabbage include the morphometry of the red cabbage plant (height of the plant, number of leaves, and wet weight). Tilapia variables include relative growth rate and fish survival rate. The results showed that the treatment of the concentration of liquid organic supplements of plants had a noticeable effect on the height of the plant, the number of leaves and the wet weight. Data of tilapia research with aquaponic system using tepal ponds include the relative growth rate of tilapia ranging from 2.84 - 3.90%/day and tilapia survival ranges from 88-92%.