CAJ | 학술논문

为探讨有效微生物( EM)对蟹塘水质和螃蟹成活率的改善作用,在南京市高淳区螃蟹文化园开展了EM应用试验研究。试验结果表明：在中华绒螯蟹养殖过程中投加EM,能有效降低水体中污染物的质量浓度,提高螃蟹成活率,但EM投加质量浓度不宜过大。当籽( EM)=1.5 mg/L时,蟹塘水体中NH+4-N、NO-2-N、COD和TP的质量浓度比不投加EM的对照塘降低12.7%~29.2%,螃蟹成活率提高2.4%；籽( EM)=6.0 mg/L时,NH+4-N、COD和TP的质量浓度分别降低1.1%、14.4%、0.03%,而NO-2-N 升高15.6%,螃蟹成活率升高1.0%。由此可见,当 EM 投加质量浓度过高(6.0 mg/L)时,水质指标及成活率改善效果不如EM投加质量浓度较低时(1.5 mg/L),且会引起NO-2-N的累积。
위탐토유효미생물( EM)대해당수질화방해성활솔적개선작용,재남경시고순구방해문화완개전료EM응용시험연구。시험결과표명：재중화융오해양식과정중투가EM,능유효강저수체중오염물적질량농도,제고방해성활솔,단EM투가질량농도불의과대。당자( EM)=1.5 mg/L시,해당수체중NH+4-N、NO-2-N、COD화TP적질량농도비불투가EM적대조당강저12.7%~29.2%,방해성활솔제고2.4%；자( EM)=6.0 mg/L시,NH+4-N、COD화TP적질량농도분별강저1.1%、14.4%、0.03%,이NO-2-N 승고15.6%,방해성활솔승고1.0%。유차가견,당 EM 투가질량농도과고(6.0 mg/L)시,수질지표급성활솔개선효과불여EM투가질량농도교저시(1.5 mg/L),차회인기NO-2-N적루적。
In order to explore the effects of effective microorganisms ( EM) on the improvement of water quality of crab ponds and survival rate of crabs, an experimental study on EM application was conducted in the Crab Cultural Park in the Gaochun District of Nanjing City. The results show that applying EM to Eriocheir sinensis culture can effectively decrease the concentration of pollutants in the water and increase the survival rate of crabs, but overdoses of EM should be avoided. With an EM concentration of 1. 5 mg/L in the crab pond, the concentrations of NH+4-N, NO-2-N, COD, and TP decreased by 12. 7% to 29. 2%, and the survival rate of crabs increased by 2. 4%, compared with the control group. However, when the concentration of EM in the crab pond increased to 6. 0 mg/L, the concentrations of NH+4-N, COD, and TP decreased by 1. 1%, 14. 4%, and 0. 03%, respectively, while the concentration of NO-2-N and the survival rate of crabs increased by 15. 6% and 1. 0%, respectively. A high EM dosage of 6. 0 mg/L resulted in poorer performance in improving the water quality and survival rate than a small EM dosage of 1. 5 mg/L, and even caused accumulation of NO-2-N.