The Effects of Nitrogen and Phosphorus Concentrations on the Growth of Four Bait Microalgae
Based on the f/2 medium,this study varied the nitrogen and phosphorus nutrient concentrations by enrichment and halving to examine their effects on the growth of Chaetoceros muelleri,Isochrysis galbana,Chlorel-la and Platymonas subcordiformis.Results indicate that all four species of bait microalgae can grow under differ ent nitrogen and phosphorus conditions,showing significant growth differences(P<0.05).The findings reveal that higher concentrations of nitrogen and phosphorus do not necessarily equate to better growth rates.Excess nutri-ents not consumed during the microalgae culturing process may enter the bivalve hatchery system through the feeding of bait,adversely affecting the growth and survival of the larvae.Optimal nutrient concentrations are i dentified as 1.760 and 0.074 mol/L for Chaetoceros muelleri,0.441 and 0.074 mol/L for Isochrysis galbana,0.880 and 0.019 mol/L for Chlorella,and 0.882 and 0.074 mol/L for Platymonas subcordiformis.
万方数据
维普
