根系氧气条件对李氏禾氮、磷净化能力的影响研究

Effect of Oxygen Condition of the Root of Leersiahexandra Swartzonthe Clearing up of Nitrogen and Phosphorus

采用李氏禾为挺水植物,通过人工浮床根系不同给氧条件调控其对富营养化水体中的氮、磷进行了净化能力研究。结果表明:经过14d的生长周期,根系贫氧条件有利于总磷(TP)的净化,比正常氧气条件下净化率提高8.76%,比富氧条件下净化率提高20.72%;但根系氧气条件的改变对总氮(TN)和化学需氧量(CODCr)的净化作用影响不大。

In this study,Leersiahexandra swartzon was plantedas emerging plant to absorb the nitrogen and phosphorus in the waterby different oxygen conditions of the artificial floating bedroot.The results indicated that poor oxygen condition was favored for the absorptive of total phosphorus(TP)after 14-daygrowingperiod,and the absorptive of TP was 8.76%and 20.72% more than that of Leersiahexandra swartzon planted under control sample and oxygen enrichment condition,respectively.However,the oxygen condition of the root did not obviously effect the absorptive of Leersiahexandra swartzon on total nitrogen(TN),as well as chemical oxygen demand(CODCr).