周  阳^{1, 2}，陈有光¹，段登选¹，王  妹²，刘红彩¹ ，陈金萍¹
（1 山东省淡水水产研究所，济南 250117；2 上海海洋大学，上海 201306）

摘要：为进一步研究凤眼莲漂浮密度与水体净化效果，在100 L水体中进行了凤眼莲100 g、200 g、300 g、400 g和500 g的梯度水培试验。经过10 d养殖试验，凤眼莲均相对增重80.9%以上。根据漂浮密度与相对增重率关系式y = 6×10－6x2 －0.005x + 1.850 7（r=0.998 9），凤眼莲最大漂浮密度为1.3 kg/m2。试验组对水体总氮、总磷最大降解速率为33.8 mg/kg?d和8.4 mg/ kg?d，为把凤眼莲控制在合理漂浮密度并有效净化水质提供了实验依据。

关键词：凤眼莲；漂浮密度；总氮；总磷；净化能力
 

Study on the float density and purification capacity of Eichhornia crassipes
ZHOU Yang² ,CHEN Youguang¹ ,DUAN Dengxuan¹ ,WANG Mei²  ,LIU Hongcai¹, CHEN Jinping¹
( 1 Fresh Water Fisheries Research Institute Of Shandong Provinces1  jinan 250117;
2 Shanghai Fisheries University2 shanghai 200090 )

Abstract: It carried on single factor gradient water experiment that 100g, 200g, 300g, 400g and 500g Eichhornia crassipes was separately put into the small water body . After 10 days of cultivation, the experiment indicated that the Eichhornia crassipes all relatively increased weight above 80.9%. According to the relationship between the float density and the rate of relatively increased weight y=6×10-6x2 - 0.005x + 1.8507 (r=0.9989), the greatest float density of Eichhornia crassipes is 1.3㎏/㎡. During the experiment, the maximum degeneration speed of total nitrogen and the total phosphorus that Eichhornia crassipes roles in the water body is 33.8 mg/㎏?d and 8.4mg/㎏?d. It had provided the effective scientific basis for controlling the reasonable float density of Eichhornia crassipes and purifying the water quality.

Key words: Eichhornia crassipes, float density, TN, TP, purification capacity

基金项目：山东省农业重大应用技术创新课题“淡水池塘节水生态高效养殖关键技术研究”（20080001）

作者简介：周阳（1982—），男，上海水产大学在读硕士，从事生态渔业研究。

通讯作者：陈有光（1961—），男，研究员，从事水产养殖与设施渔业专业研究。E-mail: chenyouguang2000@yahoo.com.cn

                                       （摘自《渔业现代化》 2008，35（4），32-35）