水源水库中藻类生长及分布特征

对西安市地表水源水中的藻类进行了监测,结果表明,2007年3-5月藻种主要为绿藻、硅藻,其优势种属分别为星球藻、直链藻,含藻量峰值出现在5月底,细胞密度为2 254 × 104个/L:6-9月藻种主要为蓝藻、绿藻,其优势种分别为微囊藻、栅列藻,含藻量峰值出现在7月中旬,细胞密度为3 009×104个/L.监测期间水源水的总氮平均含量为1.54 mg/L,总磷平均含量为0.015 mg/L,N/P较高,表现为氮过量,磷为限制因子.藻种群密度高峰值主要受磷含量、水温及光照的影响.黑河库区水体已为中营养状态,并出现了富营养型浮游植物指示种类,水体向富营养化发展趋势明显.

Character of algae variety and distribution of source water

The experimental results of algae monitoring of source water in Xi'an City showed that algae species were green algae and Diatom from March to May in 2007,of which the dominant species were Limneticus and Melosira respectively,and the peak value of algae amount appeared in the end of May and algae cell density was 22.54 million cells per liter water,while algae species were Cyanobacteria and green algae from June to September,of which the dominant species were Microcystis and Scenedesmus respectively,and th...