Utilization of biofloc pond water as a substitute for nutrition in the pak choi hydroponic system

Abstract

Increased fish consumption needs can be overcome by high stocking density in fish farming. Stocking density and high feeding rise the problem of increasing organic waste which can reduce water quality. Biofloc technology is one alternative that can overcome this problem by adding the amount of organic carbon in the pond, thereby increasing the C / N ratio of water that will grow heterotrophic bacteria. The basic principle of biofloc technology is the assimilation of inorganic nitrogen by heterotrophic microbial communities in cultivation media which can then be utilized by aquatic organisms as a food source. The government through the Ministry of Marine Affairs and Fisheries promotes freshwater fish farming with biofloc technology. The objective of this research was to assessing the effect of biofloc pond water on pak choi growth. The research was conducted for two months, planting the pak choi in pipe line using rockwool as its growth media. The cultivation used two treatments, biofloc pond water and ab mix as its nutrition. The result showed that pak choi growth with biofloc pond water was lower than ab mix nutrition.