磷和铁对洋河水库螺旋鱼腥藻生长的影响

以有机磷(β-甘油磷酸二钠盐)为磷源, 通过添加的不同营养物质(高浓度铁、厌氧底泥浸出液、微量元素), 比较螺旋鱼腥藻的生长差异, 找寻洋河水库限制螺旋鱼腥藻最大生物量的营养因素, 进而评价磷和铁对螺旋鱼腥藻生长的影响。结果表明:磷和铁同时限制了螺旋鱼腥藻的生长, 且磷的促进作用大于铁;螺旋鱼腥藻在磷浓度为0.1 mg/L, 添加高铁条件下获得最大生物量。添加磷浓度为0.02 mg/L时, 磷和铁之间不存在交互作用;而当添加磷浓度>0.02 mg/L时, 磷和铁之间存在交互作用。而加磷的同时添加厌氧底泥浸出液及微量元素对螺旋鱼腥藻生长则有抑制作用。

Effect of phosphorous and iron on the growth of Anabaena Spiroides from the Yanghe Reservoir

The growth difference of Anabaena spiroides was investigated using organic phosphorous (β-Glycerol phosphate disodium salt pentahydrate) with different nutrition (high iron concentration, anaerobic leachate, trace element) enrichment. We also determined which nutrient limited the maximum biomass of Anabaena spiroides in the Yanghe Reservoir and assessed the interaction between phosphorus and iron. The results showed that phosphorus limited the growth of Anabaena spiroides, as did iron in the Yanghe Reservoir. Moreover, the effect of phosphorus was more significant than that of iron. When the concentration of phosphorus was 0.1 mg/L, after the addition of iron, Anabaena spiroides had the maximum biomass. When the concentration of phosphorus was 0.02 mg/L, there was no interaction between phosphorus and iron. However, when the concentration of phosphorus was higher than 0.02 mg/L, there was interaction between phosphorus and iron. The growth of Anabaena spiroides was inhibited when adding phosphorus and anaerobic leachate or trace element.