作　　者： ; ; ; ; (黎春昶）;

机构地区： 广东海洋大学水产学院

出　　处： 《广东海洋大学学报》 2016年第6期52-58,共7页

摘　　要： 对广东省中山市三角镇的低盐度鱼虾混养池进行连续采样分析，结果表明，混养池中的蓝藻主要有螺旋藻（Spirulinasp.），鱼腥藻（Anabaenasp.），颤藻（Oscillatoriasp.）、铜绿微囊藻（Microcystisaeruginosa）等，其中盐泽螺旋藻的优势度为0.52~0.73。蓝藻是水体中的优势微藻种群，蓝藻细胞数量占微藻细胞数量的88%~99%，蓝藻细胞数为0.99×109~5.89×l09cell/L。混养池微藻多样性指数（H’）为1.16～2.49，养殖水体处于中度污染状态。溶解性无机氮的质量浓度为0.13~2.30mg/L，正磷酸盐质量浓度为0.25~2.39mg/L，化学需氧量的质量浓度为1.94~13.79mg/L。微囊藻毒素（MC-LR）在水中质量浓度为0.18～0.79μg/L。蓝藻细胞数量与化学需氧量之间呈显著的正相关关系，表明蓝藻的生长情况与养殖池中的有机污染程度有密切联系，低盐度的富营养化的水体能促进蓝藻的生长，成为微藻群落中的优势种群。MC-LR的质量浓度与蓝藻细胞数量之间无显著相关。 Farming often fails because of mass-production of cyanobacteria in low-salinity ponds withhigh density. By sampling continuously in low-salinity shrimp ponds of Sanjiao Town, Zhongshan City,Guangdong Province, we found that the main cyanobacteria in the shrimp pond were Spirulina sp.,Anabaena sp., Oscillatoria sp., Microcystis aeruginosa and so on, and the dominance of Spirulinasubsalsa was 0.52–0.73. Cyanobacteria became dominant species in the water body,accounting 88% –99% of microalgae quantity. Cyanobacteria quantity ranged from 0.99×109–5.89×l09 cell/L.Shannon-Wiener index of microalgae ranged from 1.16 – 2.49, the state of shrimp pond was moderatepollution. The concentration of DIN, PO4-P and COD were 0.13 – 2.30 mg/L,0.25 – 2.39 mg/L and1.94 – 13.79 mg/L,respectively. The concentration of MC-LR was 0.18 – 0.79 μg/L. According to theresults of multiple regression analysis, cyanobacteria quantities was positively correlated with COD.The results indicated that the growth condition of cyanobacteria was closely related to organic pollutionin shrimp ponds, and low-salinity eutrophicatived water body can accelerate the growth ofcyanobacteria, which made it become the dominant species in microalgae community. However,theconcentration of MC-LR was not sinificantly correlated with cyanobacteria quantity.

关 键 词： 蓝藻 环境因子 微囊藻毒素 鱼虾混养

领　　域： [农业科学]