Lu Shao-yong, Jin Xiang-can, Guo Jian-ning, Sheng Li
State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Huan Jing Ke Xue. 2007 Oct;28(10):2169-73.
The effect of biosidal treatment of initial sediment, addition of inhibitor and addition of phosphorus on the transform of nitrogen and phosphorus in the sediment-water simulative system were studied. S. quadricaudain was cultured in overlying waters took from the above experiment sets when the above experiment completed. The result indicated that, biosidal treatment enhanced the concentration of TP while there was no obvious effect on N. The TP, DTP and TN concentrations were closely between inhibitor addition set and the control set in the sediment-water simulative system but the content of NO3(-)-N of the set with inhibitor addition reached 19.2 mg x L(-1), which was much higher than that of the control set. The sediment significantly adsorbed the P added to the system, and the content of TP decreased when the system reached balance. Algae biomass of the biosidal treatment set was higher than that of the control set, and the main cause was sterilizer leaded to higher concentration of TP of the biosidal treatment set. The highest Algae biomass of the group with inhibitor (224.5 x 10(4) unit x L(-1)) was much higher than that of the control set (26 x 10(4) unit x L(-1)), and that was 5-10 times than that of other sets (sterilized set 22.5 x 10(4) unit x L(-1), set with P added 38.5 x 10(4) uni x L(-1)). Inhibitor restrained the microorganism from using some nutrition which was important to alga's growth. At the beginning, the addition of P had no remarkable effect on the alga growth, but along with the experiment, the alga of the P addition set adapted to the environment and algae biomass exceed that of the control set. The increase of biological bioavailable phosphorus of sediment in biosidal treatment set and addition of inhibitor sets were caused by the increase of algae biomass and thus the increase of liable organic phosphorus.
研究了对初始沉积物进行生物杀灭处理、添加抑制剂和添加磷对沉积物 - 水模拟系统中氮磷转化的影响。上述实验完成后，在取自上述实验组的上覆水中培养四尾栅藻。结果表明，生物杀灭处理提高了总磷（TP）浓度，而对氮没有明显影响。在沉积物 - 水模拟系统中，添加抑制剂组与对照组的TP、溶解性总磷（DTP）和总氮（TN）浓度相近，但添加抑制剂组的硝态氮（NO3(-)-N）含量达到19.2 mg·L(-1)，远高于对照组。沉积物对添加到系统中的磷有显著吸附作用，系统达到平衡时TP含量降低。生物杀灭处理组的藻类生物量高于对照组，主要原因是杀菌剂导致生物杀灭处理组的TP浓度更高。添加抑制剂组的藻类生物量最高（224.5×10(4) 单位·L(-1)），远高于对照组（26×10(4) 单位·L(-1)），是其他组（灭菌组22.5×10(4) 单位·L(-1)，添加磷组38.5×10(4) 单位·L(-1)）的5 - 10倍。抑制剂抑制微生物利用一些对藻类生长重要的营养物质。起初，添加磷对藻类生长没有显著影响，但随着实验进行，添加磷组的藻类适应了环境，藻类生物量超过了对照组。生物杀灭处理组和添加抑制剂组沉积物中生物可利用磷的增加是由于藻类生物量增加，进而导致易分解有机磷增加。
