草鱼放养密度对南四湖菹草的治理效果  

Control Effect of Grass Carp with Different Density on Potamogeton crispus in Nansi Lake

作　　者：王妹[1] 段登选 杜兴华 胡秀梅[1] 蔡新华[1] 

机构地区：[1]山东省济宁市任城区水产局,山东济宁272000 [2]山东省淡水渔业研究院,济南250013

出　　处：《湖北农业科学》2016年第16期4234-4236,4240,共4页Hubei Agricultural Sciences

基　　金：山东省现代农业产业技术体系鱼类创新团队项目(SDAIT-12-07);山东省农业重大应用技术创新项目(20140903);山东省农业科技成果转化项目(20141020);山东省西部经济隆起带科技创新人才联合基金项目(XB2014FW024)

摘　　要：近年来,随着南四湖水体富营养化的加剧,菹草(Potamogeton crispus)出现疯长现象,给湖区生态环境造成了严重破坏。试验研究了不同放养密度的草鱼对南四湖菹草的治理效果。结果表明,当草鱼的放养密度为10 000尾/hm^2时,对菹草的治理效果最好,去除率为87.9%;能够提高水中的溶氧、降低COD、氨氮和亚硝酸盐的含量,因此降低了湖泊水体的富营养化程度,有效地保护了湖区生态环境。In recent years, with the process of water eutrophication, potamogeton crispus grew wild in the Nansi lake which caused serious damage to the lake ecological environment. In this paper the control effect of grass carp with different density on potamogeton crispus in the Nansi Lake was studied. The results showed that the control effect was the best when the density of grass carp was 10 000 / hm2,and the removal rate was 87.9%. It could increase the dissolved oxygen,and reduce COD,Ammonia nitrogen, Nitrite and so on in the lake which contributed to the reduction of water eutrophication,and protected the ecological environment of the lake.

关 键 词：草鱼 菹草(Potamogeton crispus) 南四湖 治理效果 

分 类 号：X524[环境科学与工程—环境工程] Q949.71[生物学—植物学]