作　　者： ; ; ; ; ; ; ; ;

机构地区： 天津农学院

出　　处： 《天津农学院学报》 2020年第1期37-43,共7页

摘　　要： 为探究放养鲤(Cyprinus carpio)对稻田水体浮游植物群落结构和水质的影响,对试验组(稻鲤)和对照组(单种稻)的浮游植物和环境因子进行了试验分析。结果表明:试验组共鉴定出浮游植物7门18种,对照组鉴定出5门24种,试验组的浮游植物密度和生物量均显著高于对照组(P<0.05);试验组优势种11种,集中于绿藻门和硅藻门,对照组优势种13种,集中于蓝藻门和硅藻门;Shannon-Weiner多样性指数和Marglef指数分析表明,稻鲤模式浮游植物多样性低于单种稻模式;试验组水体的氨氮、亚硝酸盐与对照组无显著差异(P>0.05),但硝酸盐、总氮、COD显著低于对照组(P<0.05)。研究表明,稻田养鲤可改善稻田水体浮游植物群落结构和水质。 In order to study the effect of carp(Cyprinus carpio)on the phytoplankton community structure and water quality in paddy field,the phytoplankton and environment factors of trial group(rice-carp coculture)and control group(rice-monoculture)were studied.The results showed that there were 18 species belonged to 7 phylums in the trial group and 24 species belonged to 5 phylums in the control group,and the density and biomass of phytoplankton in the trial group were significantly higher than those in the control group(P<0.05).There were 11 dominant species in the trial group,concentrated in Chlorophyta and Bacillariophyta,and 13 dominant species in the control group,concentrated in Cyanophyta and Bacillariophyta.The indexes of Shannon-Weiner and Margalef indicated that the phytoplankton diversity of the rice-carp-coculture mode was lower than that of rice-monoculture mode(P<0.05).There was no significant difference in ammonia nitrogen and nitrite between the trial group and the control group(P>0.05),but the nitrate,total nitrogen of water(WTN)and COD was significantly lower than those of the control group(P<0.05).The results showed that the phytoplankton community structure and water quality of paddy fields had been improved after the addition of carp.

关 键 词： 稻田养鱼 鲤 浮游植物 环境因子

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