| 罗晓霞1，刘锦上2，李长玲1.不同氮营养盐浓度对斜生栅藻生长及化学组成的影响[J].广东农业科学,2018,45(1):64-69 |
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不同氮营养盐浓度对斜生栅藻生长及化学组成的影响 |
| Effects of different nitrogen concentrations on growth and chemical composition of a freshwater microalgaScenedesmus obliqnus |
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| DOI：10.16768/j.issn.1004-874X.2018.01.011 |
| 中文关键词: 斜生栅藻 氮质量浓度 生长率 藻体N 含量 藻体P 含量 |
| 英文关键词: Scenedesmus obliqnus nitrogen concentration growth rate N content of algae P content of algae |
| 基金项目:广东省海洋渔业科技与产业发展专项(A201508B08); 广东海洋大学博士启动项目（R17039） |
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| 中文摘要: |
| 研究不同氮质量浓度（0.247、2.47、24.7、123.5、247、370.5、740 mg/L）营养盐对斜生栅藻
（Scenedesmus obliqnus）生长和化学组成的影响，结果表明，不同初始氮质量浓度对栅藻生长及藻体C、N、
P 含量有显著影响。栅藻生长率随着初始氮浓度的增加而增加，在氮浓度为247 mg/L 时达到最高值，之后
随着氮浓度的继续增加而下降。因此初始氮浓度247 mg/L 为栅藻的生长饱和浓度。藻体单位体积N 含量
（mg/L）随着初始氮浓度的增加而增加，但是随着氮浓度继续增加，各浓度处理间栅藻的N 含量差异并不
明显。因此，环境中氮浓度持续增加并不会显著增加藻体的N 含量。随着氮营养盐浓度的增加，栅藻单位体
积P 含量（mg/L）呈先增加后降低的趋势；而栅藻单位细胞P 含量（mg/cell）则随着初始氮浓度的增加而
急剧下降。因此，环境中高氮浓度会抑制藻体P 含量生成。 |
| 英文摘要: |
| An experiment was carried out to evaluate the effects of different nitrogen concentrations on growth
and chemical composition of a freshwater microalga Scenedesmus obliqnus. In this study，the culture solutions were
designated with seven nitrogen concentrations，which were 0.247 mg/L，2.47 mg/L，24.7 mg/L，123.5 mg/L，247
mg/L，370.5 mg/L and 740 mg/L，respectively. The results showed that different initial nitrogen concentrations
had significant effects on the growth and the nitrogen and phosphorus contents of S. obliqnus（ P<0.05）. The
growth rate of algae increased with the nitrogen concentrations of nutrients increasing，peaking at the 247mg/L of
nitrogen concentration and decreasing thereafter. Therefore，the nitrogen concentration of 247 mg/L is the saturation
concentration for the growth of S. obliqnus. When the nitrogen concentration was 0.247～24.7 mg/L，the N content
of unit algae volume（ mg/L） increased with the increase of nitrogen concentration of nutrients，but as the nitrogen concentration continued to increase，the N content of algae had no significant difference. With the increase of nitrogen
concentration of nutrients，the P content of unit algae volume（ mg/L） increased and then decreased，the P content of
cell（ mg/cell） declined sharply. Therefore，the high nitrogen concentration in surrounding environment would inhibit
the production of algal phosphorus composition. |
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