不同浓度蓝藻水华在好氧条件下的光合作用

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摘要为研究不同浓度蓝藻水华在曝气形成的好氧条件下的光合作用，本文按叶绿素a（Chla）浓度32.5，346.8，1413.7和14250.0μg/L设4个处理组（从低到高编号依次为I、Ⅱ、Ⅲ和IV）进行实验.结果表明，各处理Chla浓度均总体呈下降趋势，但均未出现发黑或发褐现象；各处理溶氧、pH值、NH₄⁺-N浓度和最大光合作用能力F_v/F_m均有一定差异（P<0.05）.快速光响应曲线的特征参数α、ETR_max和I_k表明，处理I、Ⅱ和Ⅲ中出现较高的绿藻、硅/甲藻的光能利用效率（P<0.05），而处理IV中所有藻类的光能利用效率较低（P<0.05）.曝气增氧可以防止高浓度蓝藻水华形成黑水团；蓝藻水华初始Chla浓度约为32.5、346.8、1413.7μg/L时，在曝气形成的好氧条件下，蓝藻水华中会出现其它藻类如绿藻、硅/甲藻的生长，即藻类群落结构朝着多样化变化，对蓝藻水华形成控制.

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	王小冬
	刘兴国
	陆诗敏
	秦伯强
	刘翀
	曾宪磊
	顾兆俊

关键词 ：曝气, 好氧, 光合作用活性, 蓝藻水华, 硅藻

Abstract：An experiment was conducted to study the photosynthetic activity of different concentrations of cyanobacterial blooms under aerobic conditions formed by aeration. Four treatments (I, Ⅱ, Ⅲ and IV) were set up according to chlorophyll a (Chla) concentration, which was 32.5, 346.8, 1413.7 and 14250.0ug/L, respectively.The results showed that the Chla concentration of all treatments decreased, but no blackening or browning phenomenon occurred. There were some differences in DO, pH value, NH₄⁺-N concentration and maximum photosynthetic capacity F_v/F_m among the treatments (P<0.05).The characteristic parameters α, ETR_max and I_k of the algal Rapid Response Light Curve showed that higher photosynthetic efficiency of green algae, diatom/dinoflagellate was achieved in treatments I, Ⅱ and Ⅲ, but lower photosynthetic efficiency of all algae in treatment IV (P<0.05). Aeration can prevent high concentration of cyanobacterial bloom from forming black bloom. When the initial Chla concentration of cyanobacterial bloom was 32.5, 346.8 and 1413.7ug/L, respectively, the growth of green algae and diatom/dinoflagellate would occur in cyanobacterial bloom, showing that the algal community composition diversified under aerobic conditions, which can control the cyanobacterial blooms.

Key words： aeration aerobic photosynthetic activity cyanobacterial blooms diatom

收稿日期: 2019-01-22

PACS:

X172

基金资助:国家自然科学基金资助项目（41401580）；国家科技基础条件平台资助项目（2019DKA30470）；中国水产科学研究院国际合作资助项目（2017GH10）

通讯作者: 秦伯强,研究员,qinbq@niglas.ac.cn E-mail: qinbq@niglas.ac.cn

作者简介: 王小冬(1981-),女,湖南隆回人,副研究员,博士,主要从事水环境生态与工程研究.发表论文50余篇.

引用本文:

王小冬, 刘兴国, 陆诗敏, 秦伯强, 刘翀, 曾宪磊, 顾兆俊. 不同浓度蓝藻水华在好氧条件下的光合作用[J]. 中国环境科学, 2019, 39(8): 3412-3419. WANG Xiao-dong, LIU Xing-guo, LU Shi-min, QIN Bo-qiang, LIU Chong, ZENG Xian-lei, GU Zhao-jun. Photosynthetic activities of cyanobacterial blooms of different concentrations under aerobic conditions with aeration. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3412-3419.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I8/3412

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