Organic carbon source and C/N ratio affect inorganic nitrogen profile in the biofloc-based culture media of Pacific white shrimp (Litopenaeus vannamei)
Abstract: Organic carbon
source and C/N ratio play an important role in aquaculture system with biofloc
technology application. Nitrogen control by adding carbohydrates to the water
to stimulate heterotrophic bacterial growth by converting nitrogen into
bacterial biomass. The study investigated the effect molasses, tapioca, tapioca
by product and rice bran as carbon sources in a biofloc media at three
different C/N ratios i.e. 10, 15, and 20 on total ammonia reduction in biofloc
media. Five liters of biofloc media in a conical tank was prepared for each
replicate, which consisted of 500 mL of biofloc suspension collected from a
shrimp culture unit with biofloc technology application and 4.5 L seawater.
Pacific white shrimp culture was performed in 40L glass aquaria at a shrimp
density of 30/aquarium. There was a significant interaction between carbon
source and the C/N ratio applied (P<0.05). The use of molasses resulted in
the highest reduction rate irrespective to the C/N ratio.
Author: Muhammad Hanif Azhar,
Eddy Supriyono, Kukuh Nirmala, Julie Ekasari
Journal Code: jpperikanangg160011
