基于生物絮团技术的碳源添加对池塘养殖水质的影响

Effect of the adding of carbon resource on water quality of pond aquaculture in bio-flocs technology

为研究基于生物絮团技术的碳源添加对池塘养殖水质的影响,分别在长春、沈阳、天津选取养殖水体中氨氮、亚硝酸盐氮浓度较高的池塘,实时测定水体中氨氮浓度,并按照公式计算出所需碳源(糖蜜)添加量,用养殖池塘水溶解均匀后全池泼洒。结果发现,添加碳源后,在长春养殖站,试验组氨氮有明显下降趋势,而对照组逐渐升高;在沈阳养殖站,实验组亚硝酸盐氮有下降趋势,但对照组缓慢升高,实验组的COD一直处于下降趋势,对照组COD先降低后升高;在天津养殖站,试验组氨氮有明显下降趋势,而对照组却一直升高。研究结果表明,向水体中添加碳源可以明显降低池塘水体中过高的氨氮,并对降低亚硝酸盐氮和COD有一定的作用。

The higher concentration of ammonia nitrogen and nitrite nitrogen water of aquaculture ponds were selected to evaluate its effect on the pond aquaculture water quality by adding carbon resource in bio -flocs technology aquaculture system .The results found that with the carbon source added , in the Changchun experimental station, experimental group ammonia nitrogen significantly declined , while the control group increased;in the Shenyang experimental station,experimental group nitrite nitrogen and COD had a downward trend, but the control group increased slowly , while, the control group COD began to rise on August 17; in the Tianjin experimental station , test group had a obvious downward trend , but the control group increased constantly.The results showed that the adding of carbon resource can significantly reduce the high levels of ammonia nitrogen in the pond, and had a certain effect on reducing the concentration of nitrite nitrogen and COD.