围滩鱼塘中藻类生物量与水体养分关系的研究

Algae Biomass and Nutrient Condition in Fish Ponds in Coastal Polders.

通过大塘试验和围格试验,研究了围滩鱼塘生态系统中藻类的种群分布、变化及其与环境因子的关系。结果表明:鱼塘藻类共有7门127种,年平均(4月～10月)数量11939×106个L、平均生物量9060mgL;藻类种群数量、生物量等存在动态变化;组成、生物量都以蓝、绿、硅藻门为主;影响藻类种群的主要水环境因子是氮磷比和总磷。在本试验范围内,藻类生物量与氮磷比呈极显著负相关关系。

The relationship between Algae biomass and nutrient condition of the water body was studied in the fishpond ecosystem in coastal polders in Jiangsu Province. The results showed that there were 7 phyla and 127 species of algae in the fishponds. During 7 months of a year (from April to October), the average population and biomass of algae were 119.39×10 6 entries/L and 90.6 mg/L, respectively, which varied dynamically. Cyanophyta, Chlorophyta and Bacillariophyta were the dominant phyla of algae in the ecosystem. The major water environment factors influencing the composition of populations were N/P ratio and total P. The results of this experiment showed an extremely significant negative correlation between algae biomass and N/P ratio.