In experiment two,ponds 3,5 and 7 with 7.5 h HRT had more abundant ERIC-PCR fingerprinting bands than ponds 2,4 and 6 ponds with 4 h HRT. The HRT had less influence on root biofilm microbial community structure.

• 在工况2中；HRT为7.；5h的3号、5号和7号反应池填料生物膜ERIC-PCR指纹图条带数比HRT为4h的2号、4号和6号要多；而根系生物膜上的微生物群落结构受HRT的影响小