Effects of phosphate concentration on the growth of Scenedesmus obliquus

doi:10.14088/j.cnki.issn0439-8114.2021.16.006

Abstract

Abstract: The effects of different phosphorus concentration gradients levels on the growth of Scenedesmus obliquus was studied by setting up culture experiments with concentration gradients of 0.01, 0.05, 0.10, 0.15, 0.20 mg/L. The results showed that Scenedesmus obliquus growth associated with the phosphorus concentration in water body, in culture period, compared with the reference group, different phosphorus concentration on Scenedesmus obliquus growth had a promoting effect, under the condition of phosphorus concentration was 0.15 mg/L, the algal density maximum of 129.25×10⁴ cells/mL, when the concentration of phosphorus increased to 0.20 mg/L, the algal density reduced to 108.18×10⁴ cells/mL, instructions in five phosphorus concentration gradient, when the phosphorus concentration was 0.15 mg/L for Scenedesmus obliquus growth optimal concentration, when it higher than this concentration, the growth of Scenedesmus obliquus was restricted. According to one-way ANOVA, under the condition of sufficient nutrient nitrogen, the increase of phosphorus concentration promoted the explosive growth of algae, indicating that the increase of phosphorus concentration in water was an important factor for the generation of algal bloom.

Key words: Scenedesmus obliquus, phosphorus concentration, algal density, eutrophication

CLC Number:

X524
X835

CHEN Xiao-jiang, DONG Fu-yu, LIU Xiao-feng. Effects of phosphate concentration on the growth of Scenedesmus obliquus[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(16): 28-32.

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