Abstract: Lettuce(Sativa L. var. longigolia lam.) has been planted in a floating phytoremediation system for the decontamination of piggery wastewater. The results show that after lettuce has been planted for 28 days, the removing rates of total N(TN), ammonia-nitrogen(NH₄⁺-N), nitrate-nitrogen(NO₃^--N), total P(TP), soluble P(SP), chemical oxygen demand(COD) by the plant are 51.73%, 59.45%, 57.52%, 41.11% and 60.15% respectively, and contribution rates of TN, NH₄⁺-N, TP, SP and COD are 27.95%, 30.08%, 21.02%, 15.56% and 20.64% respectively. The biomass of lettuce planted in the wastewater for experiments is obviously higher than that of lettuce planted in soils. Furthermore, the contents of NO₃^--N, P, Zn, Cu, etc. in the body of the plant in the floating phytoremediation system are significantly lower than that in soils.

Key words: nitrogen and phosphorus removal, lettuce(Sativa L. var. longigolia lam.), floating-bed

摘要： 在漂浮植物修复系统中种植直叶生菜对猪场废水进行净化试验。结果表明：经过28 d种植之后，生菜对供试猪场废水中总氮、氨氮、总磷、可溶性磷、COD的去除率分别达51.73%、59.45%、57.52%、41.11%、60.15%，其贡献量分别达27.95%、30.08%、21.02%、15.56%、20.64%；在供试废水中栽培直叶生菜的生物量显著高于土壤栽培的生物量，而且生产植株体内NO₃^--N、P、Zn、Cu等含量均显著低于土培后的生菜。

关键词: 脱氮除磷, 直叶生菜, 浮床

CLC Number: 

• X703.1