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选择臭氧仪合适工作条件 :流速为 3L/ min,O3与水的混合时间为 6～ 8min。首先以臭氧仪全循环处理罗氏沼虾育苗池水 ,布苗后每天以臭氧仪原池循环处理池水 3～ 4 h。育苗周期内 ,试验池不换水、不添加任何药物 ,测得其 NO2 -- N、NH3- N和 COD等各指标的变化范围较对照池相应指标分别下降了 18.2 %～ 91.7%、2 5.0 %～ 39.3%和 16.5%～ 50 .0 %。试验池幼体较对照池的强壮、变态率高、变态速率快。出苗率为对照组的 1.7倍 ,出池仔虾平均体长与体重分别为对照池的 1.2与 1.4倍。
Select the appropriate ozone operating conditions: flow rate of 3L / min, O3 and water mixing time of 6 ~ 8min. First of all, the entire cycle of ozone instrument treatment of Macrobrachium rosenii nursery pond water, cloth seedlings daily ozone device to deal with the original pond water 3 ~ 4 h. During the period of seedling raising, the test cell did not change the water and did not add any drugs, and the range of change of each index such as NO2 - N, NH3-N and COD was 18.2% ~ 91.7%, 2 5.0 % ~ 39.3% and 16.5% ~ 50.0%. The test pond larvae were stronger than the control ponds with high metamorphosis rate and fast metamorphosis rate. The emergence rate was 1.7 times that of the control group. The average body length and body weight of the larvae in the ponds were 1.2 and 1.4 times of that in the control pool respectively.