池塘养殖增氧方式效果比较

为了解微孔增氧对池塘水体能量流动、水质及养殖效益的影响,对2种不同增氧方式下3个河蟹养殖池塘的养殖周期(4—9月份)进行了水质测定,获得了池塘不同水层的水温、溶氧、氨氮、亚硝酸盐及高锰酸钾盐指数数据。结果表明,夏季高温时采用微孔管道增氧能有效降低表层、底层的温差,一定程度上降低底层水温。微孔管道增氧能有效增加水体溶氧,开机90min水体底层溶氧增加速率是普通增氧机的5倍;6—9月份采用微孔增氧的池塘水体较普通增氧,NO2-N低70﹪以上,NH3-N低22.9﹪以上,高锰酸钾盐指数低20﹪以上,取得了较高的经济效益。

Contrastive study on the effects of different methods of aeration

In order to know the effects of micropore oxygen aeration on the water quality and economic out- put, indexs of two different aeration methods waters were detected, such as water temperature, dissolved oxygen, ammonia and nitrite. Results showed that, the micropore oxygen aeration could oxygenate the water quickly and effectively, had the 5 times dissolved oxygen increase velocity than common aeration. Under the condition of high temperature in summer, the difference in temperature of water between the surface and the bottom, could be effectively reduced down, especially to the temperature of the bottom water. The aquaculture water with the micropore pulp aeration was of lower concentration of NH3-H and NO2-N, but more economic output than the one with common aeration.