活体和施肥管理体系下锦鲤池塘产量、水质及细菌学参数(英文).pdf

动 物 学 研 究 2008，Apr. 29(2) ：165—173 CN 53-1040/Q ISSN 0254-5853 Zoological Research Fish Production, Water Quality and Bacteriological Parameters of Koi Carp Ponds Under Live-food and Manure Based Management Regimes Prithwiraj Jha1）* ）Sudip Barat1 ）Chitta R. Nayak2 (1. Department of Zoology, University of North Bengal, Siliguri 734013, District Darjeeling, West Bengal, India ; 2.Computer Centre, University of North Bengal, Siliguri 734 013, District Darjeeling, West Bengal, India) Abstract ：To test the effectiveness of introducing live zooplankton against direct manuring in ornamental fish ponds upon their survival and production, larvae of koi carp, Cyprinus carpio L., were cultured for 11 weeks in earthen ponds maintained according to four management regimes: (1) live zooplankton fed to carp larvae (LF); (2) direct fertilization with poultry manure (PM); (3) direct fertilization with cowdung (CD); and (4) a control treatment (C). There were three replicates for each treatment. The growth of heterotrophic bacteria and pathogenic microorganisms like Aeromonas sp. and Pseudomonas sp. were also examined in response to pond management. Values of dissolved oxygen were significantly higher (P0.05) in the water of LF ponds, compared to other treatments, while the PM and CD treatments recorded were significantly higher (P0.05) values of PO4 – P, NH4 – N, NO3 – N, NO2 – N, specific conductivity, alkalinity, and BOD, compared to the LF and C treatments. The percentages of organic carbon and total nitrogen in the bottom sediments were higher in the PM and CD treat