主养草鱼(Ctenopharyngodon idellus)池塘3种混养模式下氮含量的比较  

Comparison in Nitrogen Content Between Ctenopharyngodon idellus Dominated Fish Ponds Different in Polyculture Model

作　　者：朱玉婷[1] 杨学芬[1] 王琴[1] 陈洁[1] 施培松[1] 熊邦喜[1] 

机构地区：[1]华中农业大学水产学院,湖北武汉430070

出　　处：《生态与农村环境学报》2012年第3期329-332,共4页Journal of Ecology and Rural Environment

基　　金：国家重点基础研究发展计划(2009CB118706);"十一五"国家科技支撑计划(2006BAD03B02-04)

摘　　要：对主养草鱼(Ctenopharyngodon idellus)池塘3种混养模式(模式Ⅰ,草鱼、鲢、鳙、鲫分别为250、35、40、15尾;模式Ⅱ,草鱼、鲢、鳙、匙吻鲟、鲫分别为250、35、20、20、15尾;模式Ⅲ,草鱼、鲢、鲫分别为250、35、15尾)水体和底泥中氮含量进行比较分析。结果表明,模式Ⅰ、Ⅱ、Ⅲ水体TN含量均值分别为1.251、1.001和1.228 mg.L-1,NH4+-N含量均值分别为0.391、0.345和0.319 mg.L-1,NO3--N含量由高到低为模式Ⅰ、Ⅱ和Ⅲ,NO2--N含量由高到低为模式Ⅱ、Ⅰ和Ⅲ。模式Ⅰ、Ⅱ、Ⅲ底泥TN含量均值分别为0.793、0.910和0.963 mg.g-1,NH4+-N含量均值分别为0.005、0.006和0.004 mg.g-1。模式Ⅱ水体TN含量显著低于模式Ⅰ和Ⅲ(P<0.05),底泥中氮营养盐的转化也优于其他2种模式,可见模式Ⅱ最有利于水体中氮营养盐的转化和利用。Nitrogen contents in the waters and sediments collected from three fish ponds dominated with grass carp but slightly different in polyculture model （ Model I , containing 250 grass carps, 35 silver carps, 40 bighead carps, and 15 crucian carps; Model lI , 250 grass carps, 25 silver carps, 20 bighead carps, 20 paddlefishes, and 15 crucian carps; Model Ⅲ, 250 grass carps, 35 silver carps and 15 crucian carps） were analyzed for comparison. Results show that in wa- ters that the mean total nitrogen content of Model Ⅰ , Model Ⅱ , Model m was 1 251, 1. 001 and 1. 228 mg·L^-1, re- spectively; and the mean ammonium nitrogen content, 0. 391, 0. 345 and 0. 319 mg·L^-1 , respectively; the content of nitrate showed a decreasing order of Model I 〉 Model Ⅱ 〉 Model m, and the content of nitrite followed a different order, i.e. Model Ⅱ 〉 Model Ⅰ 〉 Model Ⅲ. And in sediments, the mean total nitrogen content of Model Ⅰ , Model Ⅲ and Model Ⅲ was 0. 793, 0. 910 and 0. 963 mg ·L^-1, respectively; and the mean ammonium nitrogen content, 0. 005, 0. 006 and 0. 004 mg·L^-1 , respectively. TN in water was significantly lower in Model Ⅱ than in Models I and m （ P 〈 0. 05 ）, and the transformation of nitrogen nutrients in the sediment was quicker too. Obviously, Model Ⅱ is the most con- ducive to transformation and utilization of nitrogen nutrients in the waterbody.

关 键 词：草鱼 氮 混养模式 池塘 

分 类 号：X524[环境科学与工程—环境工程]