CAJ | 학술논문

试验池面积0.53hm2，池深2.5m，每0.067hm2放养全长3cm 草鱼 Ctenopharyngodon idellus 0.31万尾、鳙Aristichthys nobilis 0.11万尾、白鲢 Hypophthalmichthys molitrix 0.11万尾，每15d 泼洒复合芽孢杆菌 Bacillus；对照池面积0.667hm2，池深2.5m，每0.067hm2放养草鱼0.29万尾、鳙0.15万尾、白鲢0.15万尾，不泼洒复合芽孢杆菌。在泼洒复合芽孢杆菌3d 后，检测试验池和对照池水质，研究复合芽孢杆菌对水质净化的作用。结果表明：试验池塘全年 COD、氨氮和非离子氨水平分别比对照池低6％、18％和41％，而透明度（28％）和溶解氧则增加。复合芽孢杆菌对养鱼池塘水质具有明显的净化作用。
시험지면적0.53hm2，지심2.5m，매0.067hm2방양전장3cm 초어 Ctenopharyngodon idellus 0.31만미、용Aristichthys nobilis 0.11만미、백련 Hypophthalmichthys molitrix 0.11만미，매15d 발쇄복합아포간균 Bacillus；대조지면적0.667hm2，지심2.5m，매0.067hm2방양초어0.29만미、용0.15만미、백련0.15만미，불발쇄복합아포간균。재발쇄복합아포간균3d 후，검측시험지화대조지수질，연구복합아포간균대수질정화적작용。결과표명：시험지당전년 COD、안담화비리자안수평분별비대조지저6％、18％화41％，이투명도（28％）화용해양칙증가。복합아포간균대양어지당수질구유명현적정화작용。
Grass carp Ctenopharyngodon idellus juveniles with total length of 3 cm were polycultured with bighead carp Aristichthys nobilis juveniles and silver carp Hypophthalmichthys molitrix at a initial density of 3100 grass carp juveniles, 1100 bighead carp juve-niles, and 1100 silver carp juveniles in a 0.53 hm2 test pond where a mixture of Bacillus was administrated once every 15 d and at a ini-tial density of 2900 grass carp juveniles, 1500 bighead carp juveniles, and 1500 silver carp juveniles in a 0.667 hm2 control pond where no mixture of Bacillus was administrated. Water quality indicators were monitored in the test and control ponds 3 d after administrat ion of the Bacillus mixture. It was found that the water quality indicators was shown to be 18% lower COD, 6% lower ammonia nitro-gen level, and 41% lower unionized ammonia level in the test pond than in the control pond. However, higher Secchi disk transparency (28%)and dissolved oxygen level were observed in the test pond compared with those in the control pond, indicating that the mixture of Bacillus has purification effect on the water in an aquaculture pond.