曝气扰动促进高营养的饲料腐烂液中绿藻生长  

Aeration disturbance promotes the growth of green algae at high nutrients level from fish feed decomposition

作　　者：王小冬[1] 车轩[1] 刘兴国[1] 顾兆俊[1] 丁艳青 陈晓龙[1] WANG Xiaodong;CHE Xuan;LIU Xingguo;GU Zhaojun;DING Yanqing;CHEN Xiaolong(Fishery Machinery and Instrument Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200092,China;School of Resources and Geoscience,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]中国水产科学研究院渔业机械仪器研究所,上海200092 [2]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《上海海洋大学学报》2023年第1期142-149,共8页Journal of Shanghai Ocean University

基　　金：国家重点研发计划“蓝色粮仓科技创新”专项(2020YFD0900502,2019YFD0900305);中国水产科学研究院基本科研业务费项目(2020TD63)。

摘　　要：为了研究饲料腐烂形成的高氮、磷营养盐条件下浮游植物的自发生长,夏季在玻璃温室进行了以鱼类配合饲料腐烂液为营养源的实验。实验设1个对照组和1个处理组,对照组中不曝气,处理组在12 d起进行持续曝气扰动。结果表明,曝气显著提高了水中溶解氧、pH、氧化还原电位、叶绿素a和浮游植物总生物量。对照组叶绿素a较低,在第10~17天形成峰值,处理组叶绿素a在第27天达到最高值(1169.57±1133.01)μg/L,藻生物量在第25天达到最高值(279.07±339.83)mg/L。第21~31天,处理组中绿藻门的栅藻属(Scenedesmus spp.)为优势种,而对照组中绿藻门的衣藻属(Chlamydomonas spp.)和绿球藻(Chroococcus sp.)为优势种。在曝气条件下,以鱼类配合饲料腐烂降解形成总氮、总磷质量浓度分别为3.8~22.1、2.1~16.9 mg/L的高营养水平,出现绿藻门栅藻属优势。In order to study what kinds of phytoplankton can grow spontaneously at high nitrogen and phosphorus levels formed from compound fishing feed decomposition,an experiment was carried out in a greenhouse during summer.The experiment included a control group with no aeration and a treatment group aerated continuously from day 12.The results revealed that the aeration significantly improved dissolved oxygen,pH,oxidation reduction potential values,chlorophyll a,and total algal biomass in the water.Chlorophyll a in the control was low but formed a peak from days 10 to 17,while that in the treatment reached its highest value of(1169.57±1133.01)μg/L on day 27,and the highest algal biomass was(279.07±339.83)mg/L on day 25.Green algae particularly Scenedesmus spp.dominated in the treatment,and green algae particularly Chlamydomonas spp.and Chroococcus sp.dominated in the control,from days 21 to 31.Therefore,green algae dominated under aeration at high nutrient level of 3.8-22.1 mg/L total nitrogen and 2.1-16.9 mg/L total phosphorus,which was derived from decomposing compound fish feed.

关 键 词：藻类水华 蓝藻 绿藻 富营养化 栅藻 

分 类 号：X52[环境科学与工程—环境工程]