The species composition and biomass of phytoplankton were monthly monitored in a sea cucumber Apos-tichopus japonicus culture pond of 600 m in length×80 m in width×1.2－2.0 m in depth in coastal Dalian 3－5 days before high tide from October of 2015 to September of 2016 under three water quality regulation methods including a 750 W water quality regulator, a micropore aeration system, and natural pond without any aeration system. It was found that there were the same trends of species composition and annual biomass of the same phylum in the phyto-plankton in the three ponds with different water quality regulation methods, even though 7 phyla of phytoplankton including Bacillariophyta, Pyrrophyta, Chlorophyta, Cyanophyta, Euglenophyta, Chrysophyta, and Cryptophyta) , and 79 species were observed in all ponds. The annual average biomass of phytoplankton was (16.67±0.19) mg/L in the natural pond without any aeration system, (17.44±0.16) mg/L in the pond with a micropore aeration sys-tem, and (20.10±0.13) mg/L in the pond with a 750 W water quality regulator, significantly higher than that in the natural pond without any aeration system. The maximal biomass of phytoplankton was Bacillariophyta, followed by Euglenophyta and Pyrrhophyta in the three regulation pattern ponds. There were higher biomasses of Bacillario-phyta, Euglenophyta, Chlorophyta and Cryptophyta in the pond with a 750 W water quality regulator than that in the natural pond without any aeration system in which the biomasses of Cyanophyta and Chrysophyta were higher than those in the pond with a micropore aeration system, and in the pond with a 750 W water quality regulator. Sta-tistical analysis revealed that the main factors influencing phytoplankton biomass were temperature, salinity, and levels of active phosphate and nitrite. The findings showed that water quality in the pond with a 750 W water quality regulator was better for phytoplankton growth.%为了研究水质调控技术对养殖池塘浮游植物种群结构的影响,分析测定了自然纳潮、微孔曝气(空压机0. 1 kW/667 m2) 及自制的养水机 (功率750 W) 3种水质调控方式池塘 (600 m×80 m) 中浮游植物的种类及生物量.结果表明: 3种水质调控方式下的池塘水中,浮游植物种群组成和同一藻门月平均生物量的周年变化趋势一致; 3个试验池塘中均检测到浮游植物7门 (硅藻门、甲藻门、绿藻门、蓝藻门、裸藻门、金藻门、隐藻门) 79种;自然纳潮池塘、微孔曝气池塘、养水机池塘浮游植物年平均生物量分别为(16. 67±0. 19)、 (17. 44±0. 16)、 (20. 10±0. 13) mg/L,养水机池塘生物量显著高于自然纳潮和微孔曝气池塘 (P<0. 05);各池塘浮游植物生物量均以硅藻门最高,其次是裸藻门和甲藻门;养水机池塘中硅藻门、裸藻门、绿藻门、隐藻门含量高于微孔曝气池塘和自然纳潮池塘,自然纳潮池塘中蓝藻门、金藻门含量高于养水机池塘和微孔曝气池塘;统计分析显示,浮游植物各藻门生物量的主要影响因子为温度、盐度、活性磷酸盐、亚硝酸盐.研究表明,使用新式水质改良设备养水机的池塘水质环境更利于浮游植物的生长.
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