湖北农业科学 ›› 2021, Vol. 60 ›› Issue (16): 28-32.doi: 10.14088/j.cnki.issn0439-8114.2021.16.006

• 资环∙环境 • 上一篇    下一篇

营养盐磷浓度对斜生栅藻生长的影响

陈晓江1, 董芙羽1, 刘晓峰2   

  1. 1.忻州师范学院生物系,山西 忻州 034000;
    2.山西臭冷杉省级自然保护区,山西 忻州 034000
  • 收稿日期:2020-08-08 出版日期:2021-08-25 发布日期:2021-09-09
  • 作者简介:陈晓江(1974-),男,山西大同人,讲师,博士,主要从事湖泊富营养化和水环境生态功能研究,(电话)17835020418(电子信箱)cxjmy@126.com。
  • 基金资助:
    博士科研启动项目(047/00000415); 忻州师范学院基金项目(047/00000443); 国家自然科学基金项目(51469026)

Effects of phosphate concentration on the growth of Scenedesmus obliquus

CHEN Xiao-jiang1, DONG Fu-yu1, LIU Xiao-feng2   

  1. 1. Department of Biology,Xinzhou Teachers University,Xinzhou 034000, Shanxi,China;
    2. Shanxi Province Nature Reserve of Smelly Fir,Xinzhou 034000,Shanxi,China
  • Received:2020-08-08 Online:2021-08-25 Published:2021-09-09

摘要: 设置0.01、0.05、0.10、0.15、0.20 mg/L 5个不同营养盐磷浓度梯度培养试验,研究不同磷水平对斜生栅藻(Scenedesmus obliquus)生长速率的影响。结果表明,斜生栅藻的生长与水体中磷浓度相关,在培养周期内,与对照组相比,不同磷浓度对斜生栅藻生长有促进作用,在磷浓度0.15 mg/L条件下,藻密度达到最高值,为129.25×104 个细胞/mL,当磷浓度提高到0.20 mg/L时,藻密度降低到108.18×104 个细胞/mL,说明在5个磷浓度梯度中,磷浓度0.15 mg/L为斜生栅藻生长最适浓度,而高于该浓度时会限制斜生栅藻的生长。单因素方差分析表明,在营养盐氮充足条件下,磷浓度提高促进了藻类暴发式生长,说明水体中磷浓度升高是水华产生的重要因素。

关键词: 斜生栅藻(Scenedesmus obliquus), 磷浓度, 藻密度, 富营养化

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

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