伊乐藻和固定化细菌对富营养化水体中氮循环菌的影响

本试验研究了沉水植物伊乐藻(Elodea nuttallii)和固定化微生物两者相结合对富营养化水体和底泥中4种菌群的氮循环微生物(氨化细菌、亚硝化细菌、硝化细菌、反硝化细菌)分布的影响。试验结果表明:种植沉水植物和接种固定化微生物无论对水体还是底泥都有利于4种微生物数量的增加,而且两者相结合的处理效果最为明显。与对照组相比,除氨化细菌外,其余菌群都有10~100倍的增长。虽然不同时期受环境因素的影响,各种群微生物变化并不一致,但总体上底泥中氮循环微生物的分布多于水体。研究结果显示:优化种植水生植物和固定化微生物的镶嵌技术或许是促进氮循环微生物增长,加速富营养化水体中氮素转化的有效手段。

Effects of Elodea nuttallii and Immobilized Bacteria on the Distribution of Nitrogen Cycling-Bacteria in eutrophicated Water

The paper studied the effects of submerged macrophyte and immobilized bacteria on the distribution of four bacteria communities:ammonifying bacteria;nitrosobacteria;nitrobacteria and denitrifying bacteria in water column and sediment of eutrophicted water.The results showed that both planting submerged macrophyte and inoculating bacteria could benefit the increase of four communities,and combining use of the two factors gave the best the result.Compared with CK,there were tenfold to hundredfold increase for all the bacteria except ammonifying bacteria.Though the change of four bacterial communities is not identical with the time change,but as a whole there were more nitrogen cycling-bacteria in sediment than in water body in the eutrophicated water.The results suggested that planting submerged macrophyte and inoculating nitrogen cycling bacteria may be a efficient approach for increasing the INCB and accelerating the nitrogen translation.