Uptake of Urea Nitrogen by Oocystis borgei in Prawn (Litopenaeus vannamei) Aquaculture Ponds
The goal of this study was to assess the rate of urea nitrogen uptake (ρ) by Oocystis borgei and the relationship between environmental factors and ρ. Light intensity, temperature, pH, salinity, and algal concentration, were used to construct an empirical model. The results showed that light intensity, algal concentration, pH and salinity had significant effects on ρ, and the optimal combination of environmental conditions for ρ was a temperature of 25°C, pH of 7.0, light intensity of 81 µmol m−2 s−1, salinity of 15‰, and algal concentration of 4.5 × 108 cell L−1–5.5 × 108 cell L−1. The model equation was ρ = 2 × 10−5 × (A0.363B0.783C0.045D−0.503E) + 0.0017, with a coefficient of determination (R2) of 0.83. No significant difference in variance was observed between the model-predicted values and the measured values (F = 0.238, p > 0.05), which demonstrated the high fitting degree of the simulation equation. This study provided valuable insight into the reduction of urea nitrogen levels in aquaculture water by O. borgei.
KeywordsOocystis borgei Aquaculture Urea nitrogen Uptake rate Model
This study was supported by the Research and Demonstration of Key Technologies in The Industrialization of Active Microalgae Products (KY 20180112), which is funded by Shenzhen Dapeng New Area industry Development Special, and also supported by the Future Industrial Development Project Foundation of Shenzhen (JCYJ 20170413111950426), which is funded by the Shenzhen Science and Technology Innovation Commission.
- Cai Y, Liu JY, Qin JL, Sun SG, Duan SS, Xu N (2016) Effects of environmental factors on growth and urease activity of the harmful dinoflagellate Prorocentrum donghaiense. Acta Ecol Sin 36:2–9Google Scholar
- Chen JY, Sun LS, Wu J, Yang JW (2015) Acute toxic effects of NH3-N and NO2-N on Macrobrachium rosenbergii larva at different development stages. J Aquac 36:1–6Google Scholar
- Gu BH (2006) Stable isotope labeling technique in ecosystem ecology research. Lecture on modern ecology (3): subject progress and hot topic. Higher Education Press, Beijing, pp 202–227Google Scholar
- Gu BH, Alexander V (1993) Dissolved nitrogen uptake by a cyanobacterical bloom (Anabaena flos-aquae) in a Subarctic Lake. Appl Environ Microbiol 59:422–430Google Scholar
- Huang XH (2013) Culture pollution and ecological control mechanisms using planktonic microalgae in high level prawn ponds. Doctoral dissertation of Donghua University, ShanghaiGoogle Scholar
- Huang XH, Li CL, Liu CW, Zeng DS (2002) Study on the ecological factors of Oocystis borgei. J Zhanjiang Ocean Univ 22:8–12Google Scholar
- Huang XH, Liu M, Zhou MH, Gu BH (2012a) The uptake rate and selectivity of dissolved nitrogen by Oocystis borgei in prawn pond. Fish Mod 39:34–38Google Scholar
- Li ZL, Zhou YL, Wang XJ, Shi XY, Zhang CS (2017) Effect of urea on the growth of Skeletonema costatum and Karenia mikimotoi. Acta Ecol Sin 37:3193–3200Google Scholar
- Wang ZH, Cui FY, Wei CH, Chen MM (2006) A new comprehensive factor predication model of algae biomass in local lake area. Acta Scientiae Circum stantiae 26:1379–1385Google Scholar
- Wang YQ, Huang XH, Li CL (2010) Main water quality factors in intensive prawn aquaculture pond in subtropical zone. Fish Mod 37:15–19Google Scholar
- Zou WS, Zhang JL, Liu LG, Deng WJ (2010) Effect research of immobilized algae bacteria removal ammonia nitrogen of aquaculture wastewater and proposed model. J Anhui Agric Sci 38:12650–12652Google Scholar